Articles | Volume 27, issue 8
https://doi.org/10.5194/hess-27-1695-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/hess-27-1695-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
26 Apr 2023
Research article |
| 26 Apr 2023
| 26 Apr 2023
Phenophase-based comparison of field observations to satellite-based actual evaporation estimates of a natural woodland: miombo woodland, southern Africa
Henry Zimba
CORRESPONDING AUTHOR
Water Resources Section, Faculty of Civil Engineering and Geosciences, Delft University of Technology, Stevinweg 1, 2628 CN Delft, the Netherlands
Department of Agriculture, Ministry of Agriculture, P.O. Box 50595,
Mulungushi House, Independence Avenue, Lusaka, Zambia
Miriam Coenders-Gerrits
Water Resources Section, Faculty of Civil Engineering and Geosciences, Delft University of Technology, Stevinweg 1, 2628 CN Delft, the Netherlands
Kawawa Banda
Department of Geology, Integrated Water Resources Management
Centre, School of Mines, University of Zambia, Great East Road Campus, Lusaka, Zambia
Bart Schilperoort
Water Resources Section, Faculty of Civil Engineering and Geosciences, Delft University of Technology, Stevinweg 1, 2628 CN Delft, the Netherlands
Nick van de Giesen
Water Resources Section, Faculty of Civil Engineering and Geosciences, Delft University of Technology, Stevinweg 1, 2628 CN Delft, the Netherlands
Imasiku Nyambe
Department of Geology, Integrated Water Resources Management
Centre, School of Mines, University of Zambia, Great East Road Campus, Lusaka, Zambia
Hubert H. G. Savenije
Water Resources Section, Faculty of Civil Engineering and Geosciences, Delft University of Technology, Stevinweg 1, 2628 CN Delft, the Netherlands
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The fall and flushing of new leaves in the miombo woodlands co-occur in the dry season before the commencement of seasonal rainfall. The miombo species are also said to have access to soil moisture in deep soils, including groundwater in the dry season. Satellite-based evaporation estimates, temporal trends, and magnitudes differ the most in the dry season, most likely due to inadequate understanding and representation of the highlighted miombo species attributes in simulations.
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Hydrol. Earth Syst. Sci., 24, 4587–4599, https://doi.org/10.5194/hess-24-4587-2020, https://doi.org/10.5194/hess-24-4587-2020, 2020
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Where plants exist, rain must pass through canopies to reach soils. We studied how rain interacts with dogfennel – a highly problematic weed that is abundant in pastures, grasslands, rangelands, urban forests and along highways. Dogfennels evaporated large portions (approx. one-fifth) of rain and drained significant (at times > 25 %) rain (and dew) down their stems to their roots (via stemflow). This may explain how dogfennel survives and even invades managed landscapes during extended droughts.
Petra Hulsman, Hessel C. Winsemius, Claire I. Michailovsky, Hubert H. G. Savenije, and Markus Hrachowitz
Hydrol. Earth Syst. Sci., 24, 3331–3359, https://doi.org/10.5194/hess-24-3331-2020, https://doi.org/10.5194/hess-24-3331-2020, 2020
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In the absence of discharge data in ungauged basins, remotely sensed river water level data, i.e. altimetry, may provide valuable information to calibrate hydrological models. This study illustrated that for large rivers in data-scarce regions, river altimetry data from multiple locations combined with GRACE data have the potential to fill this gap when combined with estimates of the river geometry, thereby allowing a step towards more reliable hydrological modelling in data-scarce regions.
César Dionisio Jiménez-Rodríguez, Miriam Coenders-Gerrits, Jochen Wenninger, Adriana Gonzalez-Angarita, and Hubert Savenije
Hydrol. Earth Syst. Sci., 24, 2179–2206, https://doi.org/10.5194/hess-24-2179-2020, https://doi.org/10.5194/hess-24-2179-2020, 2020
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Tropical forest ecosystems are able to export a lot of water to the atmosphere by means of evaporation. However, little is known on how their complex structure affects this water flux. This paper analyzes the contribution of three canopy layers in terms of water fluxes and stable water isotope signatures. During the dry season in 2018 the two lower canopy layers provide 20 % of measured evaporation, highlighting the importance of knowing how forest structure can affect the hydrological cycle.
Nutchanart Sriwongsitanon, Wasana Jandang, Thienchart Suwawong, and Hubert H.~G. Savenije
Hydrol. Earth Syst. Sci. Discuss., https://doi.org/10.5194/hess-2020-82, https://doi.org/10.5194/hess-2020-82, 2020
Manuscript not accepted for further review
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In this paper we present a method to distribute crucial model parameters over subcatchments so as to enhance overall rainfall-runoff performance. We also analyse how soil moisture indicators can be used to distribute root zone moisture capacity over subcatchments. NDII proves to be very effective for this purpose, resulting in better overall model performance, good temporal correspondence between modelled soil moisture and the SWI, and improved recession behavior and dry season flow.
Ameneh Mianabadi, Miriam Coenders-Gerrits, Pooya Shirazi, Bijan Ghahraman, and Amin Alizadeh
Hydrol. Earth Syst. Sci., 23, 4983–5000, https://doi.org/10.5194/hess-23-4983-2019, https://doi.org/10.5194/hess-23-4983-2019, 2019
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Evaporation is the biggest water consumer of the rainfall that falls on the land. Knowing its magnitude will help water resources to develop water use strategies. This study describes a model that can estimate the magnitude of evaporation on a global level. It does not use local information, only information from rainfall and vegetation patterns derived from satellites.
Zhilin Zhang and Hubert Savenije
Earth Syst. Dynam., 10, 667–684, https://doi.org/10.5194/esd-10-667-2019, https://doi.org/10.5194/esd-10-667-2019, 2019
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Natural systems evolve towards a state of maximum power, including estuarine circulation. The energy of lighter fresh water drives circulation, while it dissipates by friction. This rotational flow causes the spread of salinity, which is represented by the dispersion coefficient. In this paper, the maximum power concept provides a new equation for this coefficient. Together with the steady-state equation, this results in a new analytical model for density-driven salinity intrusion.
Paul C. Stoy, Tarek S. El-Madany, Joshua B. Fisher, Pierre Gentine, Tobias Gerken, Stephen P. Good, Anne Klosterhalfen, Shuguang Liu, Diego G. Miralles, Oscar Perez-Priego, Angela J. Rigden, Todd H. Skaggs, Georg Wohlfahrt, Ray G. Anderson, A. Miriam J. Coenders-Gerrits, Martin Jung, Wouter H. Maes, Ivan Mammarella, Matthias Mauder, Mirco Migliavacca, Jacob A. Nelson, Rafael Poyatos, Markus Reichstein, Russell L. Scott, and Sebastian Wolf
Biogeosciences, 16, 3747–3775, https://doi.org/10.5194/bg-16-3747-2019, https://doi.org/10.5194/bg-16-3747-2019, 2019
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Key findings are the nearly optimal response of T to atmospheric water vapor pressure deficits across methods and scales. Additionally, the notion that T / ET intermittently approaches 1, which is a basis for many partitioning methods, does not hold for certain methods and ecosystems. To better constrain estimates of E and T from combined ET measurements, we propose a combination of independent measurement techniques to better constrain E and T at the ecosystem scale.
César Dionisio Jiménez-Rodríguez, Miriam Coenders-Gerrits, Thom Bogaard, Erika Vatiero, and Hubert Savenije
Hydrol. Earth Syst. Sci. Discuss., https://doi.org/10.5194/hess-2019-344, https://doi.org/10.5194/hess-2019-344, 2019
Revised manuscript not accepted
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Knowing the isotopic composition of water vapor in the air is a difficult task. The estimation of δ18O and δ2H has to be done carefully, because it is accompanied by a high risk of methodological errors (if it is sampled) or wrong assumptions that can lead to incorrect values (if it is modeled). The aim of this work was to compare available sampling methods for water vapor in the air and estimate their isotopic composition, comparing the results against direct measurements of the sampled air.
Huayang Cai, Hubert H. G. Savenije, Erwan Garel, Xianyi Zhang, Leicheng Guo, Min Zhang, Feng Liu, and Qingshu Yang
Hydrol. Earth Syst. Sci., 23, 2779–2794, https://doi.org/10.5194/hess-23-2779-2019, https://doi.org/10.5194/hess-23-2779-2019, 2019
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Tide–river dynamics play an essential role in large-scale river deltas as they exert a tremendous impact on delta morphodynamics, salt intrusion and deltaic ecosystems. For the first time, we illustrate that there is a critical river discharge, beyond which tidal damping is reduced with increasing river discharge, and we explore the underlying mechanism using an analytical model. The results are useful for guiding sustainable water management and sediment transport in tidal rivers.
Jeffrey C. Davids, Martine M. Rutten, Anusha Pandey, Nischal Devkota, Wessel David van Oyen, Rajaram Prajapati, and Nick van de Giesen
Hydrol. Earth Syst. Sci., 23, 1045–1065, https://doi.org/10.5194/hess-23-1045-2019, https://doi.org/10.5194/hess-23-1045-2019, 2019
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Wise management of water resources requires data. Nevertheless, the amount of water data being collected continues to decline. We evaluated potential citizen science approaches for measuring flows of headwater streams and springs. After selecting salt dilution as the preferred approach, we partnered with Nepali students to cost-effectively measure flows and water quality with smartphones at 264 springs and streams which provide crucial water supplies to the rapidly expanding Kathmandu Valley.
Erwin Zehe, Ralf Loritz, Conrad Jackisch, Martijn Westhoff, Axel Kleidon, Theresa Blume, Sibylle K. Hassler, and Hubert H. Savenije
Hydrol. Earth Syst. Sci., 23, 971–987, https://doi.org/10.5194/hess-23-971-2019, https://doi.org/10.5194/hess-23-971-2019, 2019
Martijn Westhoff, Axel Kleidon, Stan Schymanski, Benjamin Dewals, Femke Nijsse, Maik Renner, Henk Dijkstra, Hisashi Ozawa, Hubert Savenije, Han Dolman, Antoon Meesters, and Erwin Zehe
Earth Syst. Dynam. Discuss., https://doi.org/10.5194/esd-2019-6, https://doi.org/10.5194/esd-2019-6, 2019
Publication in ESD not foreseen
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Even models relying on physical laws have parameters that need to be measured or estimated. Thermodynamic optimality principles potentially offer a way to reduce the number of estimated parameters by stating that a system evolves to an optimum state. These principles have been applied successfully within the Earth system, but it is often unclear what to optimize and how. In this review paper we identify commonalities between different successful applications as well as some doubtful applications.
Hongkai Gao, Christian Birkel, Markus Hrachowitz, Doerthe Tetzlaff, Chris Soulsby, and Hubert H. G. Savenije
Hydrol. Earth Syst. Sci., 23, 787–809, https://doi.org/10.5194/hess-23-787-2019, https://doi.org/10.5194/hess-23-787-2019, 2019
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Supported by large-sample ecological observations, a novel, simple and topography-driven runoff generation module (HSC-MCT) was created. The HSC-MCT is calibration-free, and therefore it can be used to predict in ungauged basins, and has great potential to be generalized at the global scale. Also, it allows us to reproduce the variation of saturation areas, which has great potential to be used for broader hydrological, ecological, climatological, and biogeochemical studies.
Nevil Quinn, Günter Blöschl, András Bárdossy, Attilio Castellarin, Martyn Clark, Christophe Cudennec, Demetris Koutsoyiannis, Upmanu Lall, Lubomir Lichner, Juraj Parajka, Christa D. Peters-Lidard, Graham Sander, Hubert Savenije, Keith Smettem, Harry Vereecken, Alberto Viglione, Patrick Willems, Andy Wood, Ross Woods, Chong-Yu Xu, and Erwin Zehe
Proc. IAHS, 380, 3–8, https://doi.org/10.5194/piahs-380-3-2018, https://doi.org/10.5194/piahs-380-3-2018, 2018
Laurène Bouaziz, Albrecht Weerts, Jaap Schellekens, Eric Sprokkereef, Jasper Stam, Hubert Savenije, and Markus Hrachowitz
Hydrol. Earth Syst. Sci., 22, 6415–6434, https://doi.org/10.5194/hess-22-6415-2018, https://doi.org/10.5194/hess-22-6415-2018, 2018
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We quantify net intercatchment groundwater flows in the Meuse basin in a complementary three-step approach through (1) water budget accounting, (2) testing a set of conceptual hydrological models and (3) evaluating against remote sensing actual evaporation data. We show that net intercatchment groundwater flows can make up as much as 25 % of mean annual precipitation in the headwaters and should therefore be accounted for in conceptual models to prevent overestimating actual evaporation rates.
Dirk-Jan D. Kok, Saket Pande, Jules B. van Lier, Angela R. C. Ortigara, Hubert Savenije, and Stefan Uhlenbrook
Hydrol. Earth Syst. Sci., 22, 5781–5799, https://doi.org/10.5194/hess-22-5781-2018, https://doi.org/10.5194/hess-22-5781-2018, 2018
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Phosphorus (P) is important to global food security. Thus it is concerning that natural P reserves are predicted to deplete within the century. Here we explore the potential of P recovery from wastewater (WW) at global scale. We identify high production and demand sites to determine optimal market prices and trade flows. We show that 20 % of the agricultural demand can be met, yet only 4 % can be met economically. Nonetheless, this recovery stimulates circular economic development in WW treatment.
Nevil Quinn, Günter Blöschl, András Bárdossy, Attilio Castellarin, Martyn Clark, Christophe Cudennec, Demetris Koutsoyiannis, Upmanu Lall, Lubomir Lichner, Juraj Parajka, Christa D. Peters-Lidard, Graham Sander, Hubert Savenije, Keith Smettem, Harry Vereecken, Alberto Viglione, Patrick Willems, Andy Wood, Ross Woods, Chong-Yu Xu, and Erwin Zehe
Hydrol. Earth Syst. Sci., 22, 5735–5739, https://doi.org/10.5194/hess-22-5735-2018, https://doi.org/10.5194/hess-22-5735-2018, 2018
Tim van Emmerik, Susan Steele-Dunne, Pierre Gentine, Rafael S. Oliveira, Paulo Bittencourt, Fernanda Barros, and Nick van de Giesen
Biogeosciences, 15, 6439–6449, https://doi.org/10.5194/bg-15-6439-2018, https://doi.org/10.5194/bg-15-6439-2018, 2018
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Trees are very important for the water and carbon cycles. Climate and weather models often assume constant vegetation parameters because good measurements are missing. We used affordable accelerometers to measure tree sway of 19 trees in the Amazon rainforest. We show that trees respond very differently to the same weather conditions, which means that vegetation parameters are dynamic. With our measurements trees can be accounted for more realistically, improving climate and weather models.
César~Dionisio Jiménez-Rodríguez, Miriam Coenders-Gerrits, Thom Bogaard, Erika Vatiero, and Hubert Savenije
Hydrol. Earth Syst. Sci. Discuss., https://doi.org/10.5194/hess-2018-538, https://doi.org/10.5194/hess-2018-538, 2018
Manuscript not accepted for further review
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The measurement of stable isotopes in water vapor has been improved with the use of laser technologies. Its direct application in the field depends on the availability of infrastructure or the budget of the project. For those cases when it is not possible, we provide an alternative method to sample the air for its later measurement. This method is based on the use of a low-cost polyethylene bag, getting stable measurements with a volume of 450 mL of air reducing the risk of sample deterioration.
Petra Hulsman, Thom A. Bogaard, and Hubert H. G. Savenije
Hydrol. Earth Syst. Sci., 22, 5081–5095, https://doi.org/10.5194/hess-22-5081-2018, https://doi.org/10.5194/hess-22-5081-2018, 2018
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In many river basins, the development of hydrological models is challenged by poor discharge data availability and quality. In contrast, water level data are more reliable, as these are direct measurements and are unprocessed. In this study, an alternative calibration method is presented using water-level time series and the Strickler–Manning formula instead of discharge. This is applied to a semi-distributed rainfall-runoff model for the semi-arid, poorly gauged Mara River basin in Kenya.
Lan Wang-Erlandsson, Ingo Fetzer, Patrick W. Keys, Ruud J. van der Ent, Hubert H. G. Savenije, and Line J. Gordon
Hydrol. Earth Syst. Sci., 22, 4311–4328, https://doi.org/10.5194/hess-22-4311-2018, https://doi.org/10.5194/hess-22-4311-2018, 2018
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Winds carry air moisture from one place to another. Thus, land-use change that alters air moisture content can also modify downwind rainfall and distant river flows. This aspect has rarely been taken into account in studies of river flow changes. We show here that remote land-use change effect on rainfall can exceed that of local, and that foreign nation influence on river flows is much more prevalent than previously thought. This has important implications for both land and water governance.
Huayang Cai, Marco Toffolon, Hubert H. G. Savenije, Qingshu Yang, and Erwan Garel
Ocean Sci., 14, 769–782, https://doi.org/10.5194/os-14-769-2018, https://doi.org/10.5194/os-14-769-2018, 2018
Stefanie R. Lutz, Andrea Popp, Tim van Emmerik, Tom Gleeson, Liz Kalaugher, Karsten Möbius, Tonie Mudde, Brett Walton, Rolf Hut, Hubert Savenije, Louise J. Slater, Anna Solcerova, Cathelijne R. Stoof, and Matthias Zink
Hydrol. Earth Syst. Sci., 22, 3589–3599, https://doi.org/10.5194/hess-22-3589-2018, https://doi.org/10.5194/hess-22-3589-2018, 2018
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Media play a key role in the communication between scientists and the general public. However, the interaction between scientists and journalists is not always straightforward. In this opinion paper, we present insights from hydrologists and journalists into the benefits, aftermath and potential pitfalls of science–media interaction. We aim to encourage scientists to participate in the diverse and evolving media landscape, and we call on the scientific community to support scientists who do so.
Elena Cristiano, Marie-Claire ten Veldhuis, Santiago Gaitan, Susana Ochoa Rodriguez, and Nick van de Giesen
Hydrol. Earth Syst. Sci., 22, 2425–2447, https://doi.org/10.5194/hess-22-2425-2018, https://doi.org/10.5194/hess-22-2425-2018, 2018
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In this work we investigate the influence rainfall and catchment scales have on hydrological response. This problem is quite relevant in urban areas, where the response is fast due to the high degree of imperviousness. We presented a new approach to classify rainfall variability in space and time and use this classification to investigate rainfall aggregation effects on urban hydrological response. This classification allows the spatial extension of the main core of the storm to be identified.
Hubert H. G. Savenije
Hydrol. Earth Syst. Sci., 22, 1911–1916, https://doi.org/10.5194/hess-22-1911-2018, https://doi.org/10.5194/hess-22-1911-2018, 2018
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This paper provides the connection between two simple equations describing groundwater flow at different scales: the Darcy equation describes groundwater flow at pore scale, the linear reservoir equation at catchment scale. The connection between the two appears to be very simple. The two parameters of the equations are proportional, depending on the porosity of the subsoil and the resistance for the groundwater to enter the surface drainage network.
Zhilin Zhang and Hubert H. G. Savenije
Earth Syst. Dynam., 9, 241–247, https://doi.org/10.5194/esd-9-241-2018, https://doi.org/10.5194/esd-9-241-2018, 2018
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This paper presents a new equation for the dispersion of salinity in alluvial estuaries based on the maximum power concept. The new equation is physically based and replaces previous empirical equations. It is very useful for application in practice because in contrast to previous methods it no longer requires a calibration parameter, turning the method into a predictive method. The paper presents successful applications in more than 23 estuaries in different parts of the world.
Koen Hilgersom, Marcel Zijlema, and Nick van de Giesen
Geosci. Model Dev., 11, 521–540, https://doi.org/10.5194/gmd-11-521-2018, https://doi.org/10.5194/gmd-11-521-2018, 2018
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This study models the local inflow of groundwater at the bottom of a stream with large density gradients between the groundwater and surface water. Modelling salt and heat transport in a water body is very challenging, as it requires large computation times. Due to the circular local groundwater inflow and a negligible stream discharge, we assume axisymmetry around the inflow, which is easily implemented in an existing model, largely reduces the computation times, and still performs accurately.
Dirk-Jan Daniel Kok, Saket Pande, Angela Renata Cordeiro Ortigara, Hubert Savenije, and Stefan Uhlenbrook
Proc. IAHS, 376, 83–86, https://doi.org/10.5194/piahs-376-83-2018, https://doi.org/10.5194/piahs-376-83-2018, 2018
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Phosphorus is necessary for the development of crops and is therefore essential in safeguarding our food security. Several studies predict that our rock phosphate reserves, used to create synthetic, phosphatic fertilizers, may become depleted within this century. This study roughly approximates for which areas in Africa we can instead recover phosphorus from wastewater in order to reduce our dependancy on unsustainable rock phosphate.
Hubertus M. Coerver, Martine M. Rutten, and Nick C. van de Giesen
Hydrol. Earth Syst. Sci., 22, 831–851, https://doi.org/10.5194/hess-22-831-2018, https://doi.org/10.5194/hess-22-831-2018, 2018
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Global hydrological models aim to model hydrological processes, like flows in a river, on a global scale, as opposed to traditional models which are regional. A big challenge in creating these models is the inclusion of impacts on the hydrological cycle caused by humans, for example by the operation of large (hydropower) dams. The presented study investigates a new way to include these impacts by dams into global hydrological models.
Bart Schilperoort, Miriam Coenders-Gerrits, Willem Luxemburg, César Jiménez Rodríguez, César Cisneros Vaca, and Hubert Savenije
Hydrol. Earth Syst. Sci., 22, 819–830, https://doi.org/10.5194/hess-22-819-2018, https://doi.org/10.5194/hess-22-819-2018, 2018
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Using the
DTStechnology, we measured the evaporation of a forest using fibre optic cables. The cables work like long thermometers, with a measurement every 12.5 cm. We placed the cables vertically along the tower, one cable being dry, the other kept wet. By looking at the dry and wet cable temperatures over the height we are able to study heat storage and the amount of water the forest is evaporating. These results can be used to better understand the storage and heat exchange of forests.
Axel Kleidon and Hubert H. G. Savenije
Hydrol. Earth Syst. Sci. Discuss., https://doi.org/10.5194/hess-2017-674, https://doi.org/10.5194/hess-2017-674, 2017
Revised manuscript not accepted
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At larger scales, the flow of rivers can often be described by a relatively simple, exponential decay, and it is unclear how such simple behaviour can be explained given that river basins show such vast complexity. Here, we use a highly idealised model to show that such simple behaviour can be explained by viewing it as the emergent consequence of the groundwater system (which feeds river flow) minimising its energy dissipation.
Natalie C. Ceperley, Theophile Mande, Nick van de Giesen, Scott Tyler, Hamma Yacouba, and Marc B. Parlange
Hydrol. Earth Syst. Sci., 21, 4149–4167, https://doi.org/10.5194/hess-21-4149-2017, https://doi.org/10.5194/hess-21-4149-2017, 2017
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We relate land cover (savanna forest and agriculture) to evaporation in Burkina Faso, west Africa. We observe more evaporation and temperature movement over the savanna forest in the headwater area relative to the agricultural section of the watershed. We find that the fraction of available energy converted to evaporation relates to vegetation cover and soil moisture. From the results, evaporation can be calculated where ground-based measurements are lacking, frequently the case across Africa.
Elena Cristiano, Marie-Claire ten Veldhuis, and Nick van de Giesen
Hydrol. Earth Syst. Sci., 21, 3859–3878, https://doi.org/10.5194/hess-21-3859-2017, https://doi.org/10.5194/hess-21-3859-2017, 2017
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In the last decades, new instruments were developed to measure rainfall and hydrological processes at high resolution. Weather radars are used, for example, to measure how rainfall varies in space and time. At the same time, new models were proposed to reproduce and predict hydrological response, in order to prevent flooding in urban areas. This paper presents a review of our current knowledge of rainfall and hydrological processes in urban areas, focusing on their variability in time and space.
Randal D. Koster, Alan K. Betts, Paul A. Dirmeyer, Marc Bierkens, Katrina E. Bennett, Stephen J. Déry, Jason P. Evans, Rong Fu, Felipe Hernandez, L. Ruby Leung, Xu Liang, Muhammad Masood, Hubert Savenije, Guiling Wang, and Xing Yuan
Hydrol. Earth Syst. Sci., 21, 3777–3798, https://doi.org/10.5194/hess-21-3777-2017, https://doi.org/10.5194/hess-21-3777-2017, 2017
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Large-scale hydrological variability can affect society in profound ways; floods and droughts, for example, often cause major damage and hardship. A recent gathering of hydrologists at a symposium to honor the career of Professor Eric Wood motivates the present survey of recent research on this variability. The surveyed literature and the illustrative examples provided in the paper show that research into hydrological variability continues to be strong, vibrant, and multifaceted.
Zhilin Zhang and Hubert H. G. Savenije
Hydrol. Earth Syst. Sci., 21, 3287–3305, https://doi.org/10.5194/hess-21-3287-2017, https://doi.org/10.5194/hess-21-3287-2017, 2017
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An estuary is where fresh water rivers meet the salty open sea. This mixture of salty fresh water leads to a varying water quality. There a model works well showing how far the salty water can travel, with an empirical parameter that needs to be calibrated every time. This paper provides a possible solution for this parameter to make the model predictive. Also, the model was improved by considering 2-D exchange flow. This new model was supported by observations in 18 estuaries around the world.
Ameneh Mianabadi, Miriam Coenders-Gerrits, Pooya Shirazi, Bijan Ghahraman, and Amin Alizadeh
Hydrol. Earth Syst. Sci. Discuss., https://doi.org/10.5194/hess-2017-306, https://doi.org/10.5194/hess-2017-306, 2017
Manuscript not accepted for further review
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Estimating evaporation at the global scale remains challenging, while it is utmost importance for food security, hydrological modelling, and flood or drought forecasting. In this paper we present a simple analytical model that can estimate evaporation (both transpiration and interception evaporation) just based on remotely sensed data sources. Despite its simplicity it is able to model evaporation well in comparison to complex land surface models.
Catchments as meta-organisms – a new blueprint for hydrological modelling
Hubert H. G. Savenije and Markus Hrachowitz
Hydrol. Earth Syst. Sci., 21, 1107–1116, https://doi.org/10.5194/hess-21-1107-2017, https://doi.org/10.5194/hess-21-1107-2017, 2017
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The natural environment that we live in is the result of evolution. This does not only apply to ecosystems, but also to the physical environment through which the water flows. This has resulted in the formation of flow patterns that obey sometimes surprisingly simple mathematical laws. Hydrological models should represent the physics of these patterns and should account for the fact that the ecosystem adjusts itself continuously to changing circumstances. Physics-based models are alive!
Tanja de Boer-Euser, Laurène Bouaziz, Jan De Niel, Claudia Brauer, Benjamin Dewals, Gilles Drogue, Fabrizio Fenicia, Benjamin Grelier, Jiri Nossent, Fernando Pereira, Hubert Savenije, Guillaume Thirel, and Patrick Willems
Hydrol. Earth Syst. Sci., 21, 423–440, https://doi.org/10.5194/hess-21-423-2017, https://doi.org/10.5194/hess-21-423-2017, 2017
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In this study, the rainfall–runoff models of eight international research groups were compared for a set of subcatchments of the Meuse basin to investigate the influence of certain model components on the modelled discharge. Although the models showed similar performances based on general metrics, clear differences could be observed for specific events. The differences during drier conditions could indeed be linked to differences in model structures.
Remko Nijzink, Christopher Hutton, Ilias Pechlivanidis, René Capell, Berit Arheimer, Jim Freer, Dawei Han, Thorsten Wagener, Kevin McGuire, Hubert Savenije, and Markus Hrachowitz
Hydrol. Earth Syst. Sci., 20, 4775–4799, https://doi.org/10.5194/hess-20-4775-2016, https://doi.org/10.5194/hess-20-4775-2016, 2016
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The core component of many hydrological systems, the moisture storage capacity available to vegetation, is typically treated as a calibration parameter in hydrological models and often considered to remain constant in time. In this paper we test the potential of a recently introduced method to robustly estimate catchment-scale root-zone storage capacities exclusively based on climate data to reproduce the temporal evolution of root-zone storage under change (deforestation).
Rolf Hut, Niels Drost, Maarten van Meersbergen, Edwin Sutanudjaja, Marc Bierkens, and Nick van de Giesen
Geosci. Model Dev. Discuss., https://doi.org/10.5194/gmd-2016-225, https://doi.org/10.5194/gmd-2016-225, 2016
Revised manuscript not accepted
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A system that predicts the amount of water flowing in each river on earth, 9 days ahead, is build using existing parts of open source computer code build by different researchers in other projects.
The glue between all pre-existing parts are all open interfaces which means that the pieces system click together like a house of LEGOs. It is easy to remove a piece (a brick) and replace it with another, improved, piece.
The resulting predictions are available online at forecast.ewatercycle.org
Ali D. Abdullah, Jacqueline I. A. Gisen, Pieter van der Zaag, Hubert H. G. Savenije, Usama F. A. Karim, Ilyas Masih, and Ioana Popescu
Hydrol. Earth Syst. Sci., 20, 4031–4042, https://doi.org/10.5194/hess-20-4031-2016, https://doi.org/10.5194/hess-20-4031-2016, 2016
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A comprehensive and detailed data set of the salinity distribution over an entire year in a complex and dynamic (because heavily utilized and modified) deltaic river system was thoroughly analysed, and formed the basis for a validated analytical model that can predict the extent of seawater among other salinity sources in an estuary. The procedure can be applied to other estuaries.
Nutchanart Sriwongsitanon, Hongkai Gao, Hubert H. G. Savenije, Ekkarin Maekan, Sirikanya Saengsawang, and Sansarith Thianpopirug
Hydrol. Earth Syst. Sci., 20, 3361–3377, https://doi.org/10.5194/hess-20-3361-2016, https://doi.org/10.5194/hess-20-3361-2016, 2016
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We demonstrated that the readily available NDII remote sensing product is a very useful proxy for moisture storage in the root zone of vegetation. We compared the temporal variation of the NDII with the root zone storage in a hydrological model of eight catchments in the Upper Ping River in Thailand, yielding very good results. Having a reliable NDII product that can help us to estimate the actual moisture storage in catchments is a major contribution to prediction in ungauged basins.
Koen Hilgersom, Tim van Emmerik, Anna Solcerova, Wouter Berghuijs, John Selker, and Nick van de Giesen
Geosci. Instrum. Method. Data Syst., 5, 151–162, https://doi.org/10.5194/gi-5-151-2016, https://doi.org/10.5194/gi-5-151-2016, 2016
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Fibre optic distributed temperature sensing allows one to measure temperature patterns along a fibre optic cable with resolutions down to 25 cm. In geosciences, we sometimes wrap the cable to a coil to measure temperature at even smaller scales. We show that coils with narrow bends affect the measured temperatures. This also holds for the object to which the coil is attached, when heated by solar radiation. We therefore recommend the necessity to carefully design such distributed temperature probes.
Nadja I. den Besten, Saket Pande, and Hubert H. G. Savenije
Proc. IAHS, 373, 115–118, https://doi.org/10.5194/piahs-373-115-2016, https://doi.org/10.5194/piahs-373-115-2016, 2016
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Maharashtra is one of the states in India that has witnessed highest rates of farmer suicides as proportion of total number of suicides. We interpret the crisis using a socio-hydrological model in two adjoining regions in Maharashtra, Marathwada and Desh, with higher farmer suicide rates in the former. The analysis confirms existing narratives: low (soil) water storage capacities, no irrigation and access to alternative sources of incomes are to blame for the crisis.
Lan Wang-Erlandsson, Wim G. M. Bastiaanssen, Hongkai Gao, Jonas Jägermeyr, Gabriel B. Senay, Albert I. J. M. van Dijk, Juan P. Guerschman, Patrick W. Keys, Line J. Gordon, and Hubert H. G. Savenije
Hydrol. Earth Syst. Sci., 20, 1459–1481, https://doi.org/10.5194/hess-20-1459-2016, https://doi.org/10.5194/hess-20-1459-2016, 2016
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We present an "Earth observation-based" method for estimating root zone storage capacity – a critical parameter in land surface modelling that represents the maximum amount of soil moisture available for vegetation. Variability within a land cover type is captured, and a global model evaporation simulation is overall improved, particularly in sub-humid to humid regions with seasonality. This new method can eliminate the need for unreliable soil and root depth data in land surface modelling.
Huayang Cai, Hubert H. G. Savenije, Chenjuan Jiang, Lili Zhao, and Qingshu Yang
Hydrol. Earth Syst. Sci., 20, 1177–1195, https://doi.org/10.5194/hess-20-1177-2016, https://doi.org/10.5194/hess-20-1177-2016, 2016
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In this paper, an analytical model for tide-river dynamics has been used to understand the influence of tide and fresh water discharge on the rise of mean water level along the estuary, which remains poorly understood. It is shown that the mean water level is influenced primarily by the tide-river interaction in the tide-dominated region, while it is mainly controlled by the river flow in the upstream part of the estuary.
Remko C. Nijzink, Luis Samaniego, Juliane Mai, Rohini Kumar, Stephan Thober, Matthias Zink, David Schäfer, Hubert H. G. Savenije, and Markus Hrachowitz
Hydrol. Earth Syst. Sci., 20, 1151–1176, https://doi.org/10.5194/hess-20-1151-2016, https://doi.org/10.5194/hess-20-1151-2016, 2016
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The heterogeneity of landscapes in river basins strongly affects the hydrological response. In this study, the distributed mesoscale Hydrologic Model (mHM) was equipped with additional processes identified by landscapes within one modelling cell. Seven study catchments across Europe were selected to test the value of this additional sub-grid heterogeneity. In addition, the models were constrained based on expert knowledge. Generally, the modifications improved the representation of low flows.
Demetris Koutsoyiannis, Günter Blöschl, András Bárdossy, Christophe Cudennec, Denis Hughes, Alberto Montanari, Insa Neuweiler, and Hubert Savenije
Hydrol. Earth Syst. Sci., 20, 1081–1084, https://doi.org/10.5194/hess-20-1081-2016, https://doi.org/10.5194/hess-20-1081-2016, 2016
K. E. R. Pramana, M. W. Ertsen, and N. C. van de Giesen
Hydrol. Earth Syst. Sci. Discuss., https://doi.org/10.5194/hessd-12-9489-2015, https://doi.org/10.5194/hessd-12-9489-2015, 2015
Revised manuscript not accepted
J. Hoogeveen, J.-M. Faurès, L. Peiser, J. Burke, and N. van de Giesen
Hydrol. Earth Syst. Sci., 19, 3829–3844, https://doi.org/10.5194/hess-19-3829-2015, https://doi.org/10.5194/hess-19-3829-2015, 2015
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GlobWat is a freely distributed, global soil water balance model that is used by FAO to assess water use in irrigated agriculture, the main factor behind scarcity of freshwater in an increasing number of regions. The model is based on spatially distributed high-resolution data sets that are consistent at global level and is calibrated and validated against information published in global databases. The paper describes methodology, input and output data, calibration and validation of the model.
J. I. A. Gisen, H. H. G. Savenije, and R. C. Nijzink
Hydrol. Earth Syst. Sci., 19, 2791–2803, https://doi.org/10.5194/hess-19-2791-2015, https://doi.org/10.5194/hess-19-2791-2015, 2015
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We revised the predictive equations for two calibrated parameters in salt intrusion model (the Van der Burgh coefficient K and dispersion coefficient D) using an extended database of 89 salinity profiles including 8 newly conducted salinity measurements. The revised predictive equations consist of easily measured parameters such as the geometry of estuary, tide, friction and the Richardson number. These equations are useful in obtaining the first estimate of salinity distribution in an estuary.
D. Diederen, H. H. G. Savenije, and M. Toffolon
Ocean Sci. Discuss., https://doi.org/10.5194/osd-12-925-2015, https://doi.org/10.5194/osd-12-925-2015, 2015
Revised manuscript not accepted
S. Pande, L. Arkesteijn, H. Savenije, and L. A. Bastidas
Hydrol. Earth Syst. Sci. Discuss., https://doi.org/10.5194/hessd-12-3945-2015, https://doi.org/10.5194/hessd-12-3945-2015, 2015
Revised manuscript not accepted
G. Bruni, R. Reinoso, N. C. van de Giesen, F. H. L. R. Clemens, and J. A. E. ten Veldhuis
Hydrol. Earth Syst. Sci., 19, 691–709, https://doi.org/10.5194/hess-19-691-2015, https://doi.org/10.5194/hess-19-691-2015, 2015
S. A. P. de Jong, J. D. Slingerland, and N. C. van de Giesen
Atmos. Meas. Tech., 8, 335–339, https://doi.org/10.5194/amt-8-335-2015, https://doi.org/10.5194/amt-8-335-2015, 2015
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By using two cylindrical thermometers with different diameters, one can determine what temperature a zero diameter thermometer would have. Such a virtual thermometer would not be affected by solar heating and would take on the temperature of the surrounding air. We applied this principle to atmospheric temperature measurements with fiber optic cables using distributed temperature sensing (DTS). With two unshielded cable pairs, one black pair and one white pair, good results were obtained.
J. D. Edixhoven, J. Gupta, and H. H. G. Savenije
Earth Syst. Dynam., 5, 491–507, https://doi.org/10.5194/esd-5-491-2014, https://doi.org/10.5194/esd-5-491-2014, 2014
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Phosphate rock is a finite resource required for fertilizer production. Following a debate over the PR depletion timeline, global PR reserves were recently increased 4-fold based mainly on a restatement of Moroccan reserves. We review whether this restatement is methodologically compatible with resource terminology used in major resource classifications, whether resource classification nomenclature is sufficiently understood in the literature, and whether the recent restatements are reliable.
S. Gharari, M. Hrachowitz, F. Fenicia, H. Gao, and H. H. G. Savenije
Hydrol. Earth Syst. Sci., 18, 4839–4859, https://doi.org/10.5194/hess-18-4839-2014, https://doi.org/10.5194/hess-18-4839-2014, 2014
S. Gharari, M. Shafiei, M. Hrachowitz, R. Kumar, F. Fenicia, H. V. Gupta, and H. H. G. Savenije
Hydrol. Earth Syst. Sci., 18, 4861–4870, https://doi.org/10.5194/hess-18-4861-2014, https://doi.org/10.5194/hess-18-4861-2014, 2014
L. Wang-Erlandsson, R. J. van der Ent, L. J. Gordon, and H. H. G. Savenije
Earth Syst. Dynam., 5, 441–469, https://doi.org/10.5194/esd-5-441-2014, https://doi.org/10.5194/esd-5-441-2014, 2014
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We investigate the temporal characteristics of partitioned evaporation on land, and we present STEAM (Simple Terrestrial Evaporation to Atmosphere Model) -- a hydrological land-surface model developed to provide inputs to moisture tracking. The terrestrial residence timescale of transpiration (days to months) has larger inter-seasonal variation and is substantially longer than that of interception (hours). This can cause differences in moisture recycling, which is investigated more in Part 2.
R. J. van der Ent, L. Wang-Erlandsson, P. W. Keys, and H. H. G. Savenije
Earth Syst. Dynam., 5, 471–489, https://doi.org/10.5194/esd-5-471-2014, https://doi.org/10.5194/esd-5-471-2014, 2014
T. H. M. van Emmerik, Z. Li, M. Sivapalan, S. Pande, J. Kandasamy, H. H. G. Savenije, A. Chanan, and S. Vigneswaran
Hydrol. Earth Syst. Sci., 18, 4239–4259, https://doi.org/10.5194/hess-18-4239-2014, https://doi.org/10.5194/hess-18-4239-2014, 2014
H. Cai, H. H. G. Savenije, and C. Jiang
Hydrol. Earth Syst. Sci., 18, 4153–4168, https://doi.org/10.5194/hess-18-4153-2014, https://doi.org/10.5194/hess-18-4153-2014, 2014
M. Valk, H. H. G. Savenije, C. C. J. M. Tiberius, and W. M. J. Luxemburg
Hydrol. Earth Syst. Sci., 18, 2599–2613, https://doi.org/10.5194/hess-18-2599-2014, https://doi.org/10.5194/hess-18-2599-2014, 2014
C. Volta, S. Arndt, H. H. G. Savenije, G. G. Laruelle, and P. Regnier
Geosci. Model Dev., 7, 1271–1295, https://doi.org/10.5194/gmd-7-1271-2014, https://doi.org/10.5194/gmd-7-1271-2014, 2014
G. Blöschl, A. Bárdossy, D. Koutsoyiannis, Z. W. Kundzewicz, I. Littlewood, A. Montanari, and H. Savenije
Hydrol. Earth Syst. Sci., 18, 2433–2435, https://doi.org/10.5194/hess-18-2433-2014, https://doi.org/10.5194/hess-18-2433-2014, 2014
H. Gao, M. Hrachowitz, F. Fenicia, S. Gharari, and H. H. G. Savenije
Hydrol. Earth Syst. Sci., 18, 1895–1915, https://doi.org/10.5194/hess-18-1895-2014, https://doi.org/10.5194/hess-18-1895-2014, 2014
S. Pande, L. Arkesteijn, H. H. G. Savenije, and L. A. Bastidas
Hydrol. Earth Syst. Sci. Discuss., https://doi.org/10.5194/hessd-11-2555-2014, https://doi.org/10.5194/hessd-11-2555-2014, 2014
Manuscript not accepted for further review
H. H. G. Savenije, A. Y. Hoekstra, and P. van der Zaag
Hydrol. Earth Syst. Sci., 18, 319–332, https://doi.org/10.5194/hess-18-319-2014, https://doi.org/10.5194/hess-18-319-2014, 2014
H. Cai, H. H. G. Savenije, and M. Toffolon
Hydrol. Earth Syst. Sci., 18, 287–304, https://doi.org/10.5194/hess-18-287-2014, https://doi.org/10.5194/hess-18-287-2014, 2014
R. J. van der Ent, O. A. Tuinenburg, H.-R. Knoche, H. Kunstmann, and H. H. G. Savenije
Hydrol. Earth Syst. Sci., 17, 4869–4884, https://doi.org/10.5194/hess-17-4869-2013, https://doi.org/10.5194/hess-17-4869-2013, 2013
S. V. Weijs, N. van de Giesen, and M. B. Parlange
Hydrol. Earth Syst. Sci., 17, 3171–3187, https://doi.org/10.5194/hess-17-3171-2013, https://doi.org/10.5194/hess-17-3171-2013, 2013
B. M. C. Fischer, M. L. Mul, and H. H. G. Savenije
Hydrol. Earth Syst. Sci., 17, 2161–2170, https://doi.org/10.5194/hess-17-2161-2013, https://doi.org/10.5194/hess-17-2161-2013, 2013
T. Euser, H. C. Winsemius, M. Hrachowitz, F. Fenicia, S. Uhlenbrook, and H. H. G. Savenije
Hydrol. Earth Syst. Sci., 17, 1893–1912, https://doi.org/10.5194/hess-17-1893-2013, https://doi.org/10.5194/hess-17-1893-2013, 2013
A. M. J. Coenders-Gerrits, L. Hopp, H. H. G. Savenije, and L. Pfister
Hydrol. Earth Syst. Sci., 17, 1749–1763, https://doi.org/10.5194/hess-17-1749-2013, https://doi.org/10.5194/hess-17-1749-2013, 2013
O. A. C. Hoes, R. W. Hut, N. C. van de Giesen, and M. Boomgaard
Nat. Hazards Earth Syst. Sci. Discuss., https://doi.org/10.5194/nhessd-1-417-2013, https://doi.org/10.5194/nhessd-1-417-2013, 2013
Revised manuscript has not been submitted
M. Hrachowitz, H. Savenije, T. A. Bogaard, D. Tetzlaff, and C. Soulsby
Hydrol. Earth Syst. Sci., 17, 533–564, https://doi.org/10.5194/hess-17-533-2013, https://doi.org/10.5194/hess-17-533-2013, 2013
Related subject area
Subject: Water Resources Management | Techniques and Approaches: Instruments and observation techniques
Phosphorus supply and floodplain design govern phosphorus reduction capacity in remediated agricultural streams
Transpiration rates from mature Eucalyptus grandis × E. nitens clonal hybrid and Pinus elliottii plantations near the Two Streams Research Catchment, South Africa
Patterns and drivers of water quality changes associated with dams in the Tropical Andes
δ13C, CO2 ∕ 3He and 3He ∕ 4He ratios reveal the presence of mantle gas in the CO2-rich groundwaters of the Ardennes massif (Spa, Belgium)
Advances in the hydraulic interpretation of water wells using flowmeter logs
Continuous monitoring of a soil aquifer treatment system's physico-chemical conditions to optimize operational performance
Building a methodological framework and toolkit for news media dataset tracking of conflict and cooperation dynamics on transboundary rivers
Investigating the environmental response to water harvesting structures: a field study in Tanzania
The importance of city trees for reducing net rainfall: comparing measurements and simulations
Small-scale characterization of vine plant root water uptake via 3-D electrical resistivity tomography and mise-à-la-masse method
Hydrogeological controls on spatial patterns of groundwater discharge in peatlands
Monitoring surface water quality using social media in the context of citizen science
Using crowdsourced web content for informing water systems operations in snow-dominated catchments
Learning about water resource sharing through game play
High-resolution monitoring of nutrients in groundwater and surface waters: process understanding, quantification of loads and concentrations, and management applications
Contrasting watershed-scale trends in runoff and sediment yield complicate rangeland water resources planning
The use of semi-structured interviews for the characterisation of farmer irrigation practices
High-frequency monitoring of water fluxes and nutrient loads to assess the effects of controlled drainage on water storage and nutrient transport
Investigating suspended sediment dynamics in contrasting agricultural catchments using ex situ turbidity-based suspended sediment monitoring
Vulnerability of groundwater resources to interaction with river water in a boreal catchment
Drivers of spatial and temporal variability of streamflow in the Incomati River basin
Using high-resolution phosphorus data to investigate mitigation measures in headwater river catchments
Comparison of sampling methodologies for nutrient monitoring in streams: uncertainties, costs and implications for mitigation
Geophysical methods to support correct water sampling locations for salt dilution gauging
Water management simulation games and the construction of knowledge
Tracing the spatial propagation of river inlet water into an agricultural polder area using anthropogenic gadolinium
Transboundary geophysical mapping of geological elements and salinity distribution critical for the assessment of future sea water intrusion in response to sea level rise
Potentials and limits of urban rainwater harvesting in the Middle East
Hydrologic feasibility of artificial forestation in the semi-arid Loess Plateau of China
Hydraulic analysis of river training cross-vanes as part of post-restoration monitoring
Modern comprehensive approach to monitor the morphodynamic evolution of a restored river corridor
The effect of physical water quality and water level changes on the occurrence and density of Anopheles mosquito larvae around the shoreline of the Koka reservoir, central Ethiopia
Space-time variability of hydrological drought and wetness in Iran using NCEP/NCAR and GPCC datasets
Relative impacts of key drivers on the response of the water table to a major alley farming experiment
Lukas Hallberg, Faruk Djodjic, and Magdalena Bieroza
Hydrol. Earth Syst. Sci., 28, 341–355, https://doi.org/10.5194/hess-28-341-2024, https://doi.org/10.5194/hess-28-341-2024, 2024
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Floodplains can be constructed along agricultural streams with the purpose of increasing water residence time, thereby reducing instream erosion and intercepting nutrient export. In this paper we show how this remediation measure can reduce phosphorus concentrations by up to 30 % through optimized floodplain designs and placement. These reductions were primarily facilitated by protection against erosion rather than by the promotion of deposition on floodplains.
Nkosinathi David Kaptein, Colin S. Everson, Alistair David Clulow, Michele Lynn Toucher, and Ilaria Germishuizen
Hydrol. Earth Syst. Sci., 27, 4467–4484, https://doi.org/10.5194/hess-27-4467-2023, https://doi.org/10.5194/hess-27-4467-2023, 2023
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Water-use studies comparing pine and Eucalyptus are limited. This study used internationally recognized methods to measure water use by Eucalyptus and pine over two seasons. Results showed that, over one season, pine used more water than Eucalyptus, which was contrary to previous long-term studies. However, the Eucalyptus site was found to be water stressed. This study concluded that the observed water stress and reduced transpiration rates must be included in hydrological models.
R. Scott Winton, Silvia López-Casas, Daniel Valencia-Rodríguez, Camilo Bernal-Forero, Juliana Delgado, Bernhard Wehrli, and Luz Jiménez-Segura
Hydrol. Earth Syst. Sci., 27, 1493–1505, https://doi.org/10.5194/hess-27-1493-2023, https://doi.org/10.5194/hess-27-1493-2023, 2023
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Dams are an important and rapidly growing means of energy generation in the Tropical Andes of South America. To assess the impacts of dams in the region, we assessed differences in the upstream and downstream water quality of all hydropower dams in Colombia. We found evidence of substantial dam-induced changes in water temperature, dissolved oxygen concentration and suspended sediments. Dam-induced changes in Colombian waters violate regulations and are likely impacting aquatic life.
Agathe Defourny, Pierre-Henri Blard, Laurent Zimmermann, Patrick Jobé, Arnaud Collignon, Frédéric Nguyen, and Alain Dassargues
Hydrol. Earth Syst. Sci., 26, 2637–2648, https://doi.org/10.5194/hess-26-2637-2022, https://doi.org/10.5194/hess-26-2637-2022, 2022
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The Belgian city of Spa is known worldwide for its ferruginous and naturally sparkling groundwater springs that gave their name to the bathing tradition commonly called
spa. However, the origin of the dissolved CO2 they contain was still a matter of debate. Thanks to new analysis on groundwater samples, particularly carbon and helium isotopes together with dissolved gases, this study has demonstrated that the volcanic origin of the CO2 is presumably from the neighboring Eifel volcanic fields.
Jesús Díaz-Curiel, Bárbara Biosca, Lucía Arévalo-Lomas, María Jesús Miguel, and Natalia Caparrini
Hydrol. Earth Syst. Sci., 26, 2617–2636, https://doi.org/10.5194/hess-26-2617-2022, https://doi.org/10.5194/hess-26-2617-2022, 2022
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A methodology is developed for a new hydraulic characterization of continental hydrological basins. For this purpose, the division of wells into flow stretches with different hydraulic behaviour is made according to the results of the flowmeter, supposing that the hypothesis hydraulic heads of the deepest flow stretches of the well do not necessarily match the head shown by the overall well.
Tuvia Turkeltaub, Alex Furman, Ron Mannheim, and Noam Weisbrod
Hydrol. Earth Syst. Sci., 26, 1565–1578, https://doi.org/10.5194/hess-26-1565-2022, https://doi.org/10.5194/hess-26-1565-2022, 2022
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The quality control and optimization of soil aquifer treatment (SAT) performance is challenging due to the multiple factors and costs involved. We installed in situ subsurface monitoring sensors that provided continuous high-resolution monitoring of the biochemical and physical conditions of an active SAT system. Data analysis facilitated the determination of the optimal drying and wetting stages, which are critical for suitable SAT management.
Liying Guo, Jing Wei, Keer Zhang, Jiale Wang, and Fuqiang Tian
Hydrol. Earth Syst. Sci., 26, 1165–1185, https://doi.org/10.5194/hess-26-1165-2022, https://doi.org/10.5194/hess-26-1165-2022, 2022
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Data support is crucial for the research of conflict and cooperation on transboundary rivers. Conventional, manual constructions of datasets cannot meet the requirements for fast updates in the big data era. This study brings up a revised methodological framework, based on the conventional method, and a toolkit for the news media dataset tracking of conflict and cooperation dynamics on transboundary rivers. A dataset with good tradeoffs between data relevance and coverage is generated.
Jessica A. Eisma and Venkatesh M. Merwade
Hydrol. Earth Syst. Sci., 24, 1891–1906, https://doi.org/10.5194/hess-24-1891-2020, https://doi.org/10.5194/hess-24-1891-2020, 2020
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Sand dams capture and store water for use during the dry season in rural communities. A year long field study of three sand dams in Tanzania showed that sand dams are not a suitable habitat for aquatic insects. They capture plenty of water, but most is evaporated during the first few months of the dry season. Sand dams positively impact vegetation and minimally impact erosion. Community water security can be increased by sand dams, but site characteristics and construction are important factors.
Vincent Smets, Charlotte Wirion, Willy Bauwens, Martin Hermy, Ben Somers, and Boud Verbeiren
Hydrol. Earth Syst. Sci., 23, 3865–3884, https://doi.org/10.5194/hess-23-3865-2019, https://doi.org/10.5194/hess-23-3865-2019, 2019
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The impact of city trees for intercepting rainfall is quantified using measurements and modeling tools. The measurements show that an important amount of rainfall is intercepted, limiting the amount of water reaching the ground. Models are used to extrapolate the measurement results. The performance of two specialized interception models and one water balance model is evaluated. Our results show that the performance of the water balance model is similar to the specialized interception models.
Benjamin Mary, Luca Peruzzo, Jacopo Boaga, Myriam Schmutz, Yuxin Wu, Susan S. Hubbard, and Giorgio Cassiani
Hydrol. Earth Syst. Sci., 22, 5427–5444, https://doi.org/10.5194/hess-22-5427-2018, https://doi.org/10.5194/hess-22-5427-2018, 2018
Danielle K. Hare, David F. Boutt, William P. Clement, Christine E. Hatch, Glorianna Davenport, and Alex Hackman
Hydrol. Earth Syst. Sci., 21, 6031–6048, https://doi.org/10.5194/hess-21-6031-2017, https://doi.org/10.5194/hess-21-6031-2017, 2017
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This research examines what processes drive the location and strength of groundwater springs within a peatland environment. Using temperature and geophysical methods, we demonstrate that the relationship between regional groundwater flow gradients and the basin shape below the peatland surface control where groundwater springs occur. Understanding this relationship will support effective restoration efforts, as groundwater spring locations are important to overall peatland function and ecology.
Hang Zheng, Yang Hong, Di Long, and Hua Jing
Hydrol. Earth Syst. Sci., 21, 949–961, https://doi.org/10.5194/hess-21-949-2017, https://doi.org/10.5194/hess-21-949-2017, 2017
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Do you feel angry if the river in your living place is polluted by industries? Do you want to do something to save your environment? Just log in to http://www.thuhjjc.com and use the Tsinghua Environment Monitoring Platform (TEMP) to photograph the water pollution actives and make your report. This study established a social media platform to monitor and report surface water quality. The effectiveness of the platform was demonstrated by the 324 water quality reports across 30 provinces in China.
Matteo Giuliani, Andrea Castelletti, Roman Fedorov, and Piero Fraternali
Hydrol. Earth Syst. Sci., 20, 5049–5062, https://doi.org/10.5194/hess-20-5049-2016, https://doi.org/10.5194/hess-20-5049-2016, 2016
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The unprecedented availability of user-generated data on the Web is opening new opportunities for enhancing real-time monitoring and modeling of environmental systems based on data that are public, low-cost, and spatiotemporally dense. In this paper, we contribute a novel crowdsourcing procedure for extracting snow-related information from public web images. The value of the obtained virtual snow indexes is assessed for a real-world water management problem.
Tracy Ewen and Jan Seibert
Hydrol. Earth Syst. Sci., 20, 4079–4091, https://doi.org/10.5194/hess-20-4079-2016, https://doi.org/10.5194/hess-20-4079-2016, 2016
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Games are an optimal way to teach about water resource sharing, as they allow real-world scenarios to be explored. We look at how games can be used to teach about water resource sharing, by both playing and developing water games. An evaluation of the web-based game Irrigania found Irrigania to be an effective and easy tool to incorporate into curriculum, and a course on developing water games encouraged students to think about water resource sharing in a more critical and insightful way.
Frans C. van Geer, Brian Kronvang, and Hans Peter Broers
Hydrol. Earth Syst. Sci., 20, 3619–3629, https://doi.org/10.5194/hess-20-3619-2016, https://doi.org/10.5194/hess-20-3619-2016, 2016
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The paper includes a review of the current state of high-frequency monitoring in groundwater and surface waters as an outcome of a special issue of HESS and four sessions at EGU on this topic. The focus of the paper is to look at how high-frequency monitoring can be used as a valuable support to assess the management efforts under various EU directives. We conclude that we in future will see a transition from research to implementation in operational monitoring use of high-frequency sensors.
Matthew D. Berg, Franco Marcantonio, Mead A. Allison, Jason McAlister, Bradford P. Wilcox, and William E. Fox
Hydrol. Earth Syst. Sci., 20, 2295–2307, https://doi.org/10.5194/hess-20-2295-2016, https://doi.org/10.5194/hess-20-2295-2016, 2016
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Rangelands, from grasslands to woodlands, cover much of the earth. These areas face great pressure to meet growing water needs. Data on large-scale dynamics that drive water planning remain rare. Our watershed-scale results challenge simplistic hydrological assumptions. Streamflow was resilient to dramatic landscape changes. These changes did shape sediment yield, affecting water storage. Understanding these processes is vital to projections of rangeland water resources in a changing world.
Jimmy O'Keeffe, Wouter Buytaert, Ana Mijic, Nicholas Brozović, and Rajiv Sinha
Hydrol. Earth Syst. Sci., 20, 1911–1924, https://doi.org/10.5194/hess-20-1911-2016, https://doi.org/10.5194/hess-20-1911-2016, 2016
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Semi-structured interviews provide an effective and efficient way of collecting qualitative and quantitative data on water use practices. Interviews are organised around a topic guide, which helps lead the conversation while allowing sufficient opportunity to identify issues previously unknown to the researcher. The use of semi-structured interviews could significantly and quickly improve insight on water resources, leading to more realistic future management options and increased water security.
J. C. Rozemeijer, A. Visser, W. Borren, M. Winegram, Y. van der Velde, J. Klein, and H. P. Broers
Hydrol. Earth Syst. Sci., 20, 347–358, https://doi.org/10.5194/hess-20-347-2016, https://doi.org/10.5194/hess-20-347-2016, 2016
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Controlled drainage has been recognized as an effective option to optimize soil moisture conditions for agriculture and to reduce unnecessary losses of fresh water and nutrients. For a grassland field in the Netherlands, we measured the changes in the field water and solute balance after introducing controlled drainage. We concluded that controlled drainage reduced the drain discharge and increased the groundwater storage in the field, but did not have clear positive effects for water quality.
S. C. Sherriff, J. S. Rowan, A. R. Melland, P. Jordan, O. Fenton, and D. Ó hUallacháin
Hydrol. Earth Syst. Sci., 19, 3349–3363, https://doi.org/10.5194/hess-19-3349-2015, https://doi.org/10.5194/hess-19-3349-2015, 2015
A. Rautio, A.-L. Kivimäki, K. Korkka-Niemi, M. Nygård, V.-P. Salonen, K. Lahti, and H. Vahtera
Hydrol. Earth Syst. Sci., 19, 3015–3032, https://doi.org/10.5194/hess-19-3015-2015, https://doi.org/10.5194/hess-19-3015-2015, 2015
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Based on low-altitude aerial infrared surveys, around 370 groundwater–surface water interaction sites were located. Longitudinal temperature patterns, stable isotopes and dissolved silica composition of the studied rivers differed. Interaction sites identified in the proximity of 12 municipal water plants during low-flow seasons should be considered as potential risk areas during flood periods and should be taken under consideration in river basin management under changing climatic situations.
A. M. L. Saraiva Okello, I. Masih, S. Uhlenbrook, G. P. W. Jewitt, P. van der Zaag, and E. Riddell
Hydrol. Earth Syst. Sci., 19, 657–673, https://doi.org/10.5194/hess-19-657-2015, https://doi.org/10.5194/hess-19-657-2015, 2015
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We studied long-term daily records of rainfall and streamflow of the Incomati River basin in southern Africa. We used statistical analysis and the Indicators of Hydrologic Alteration tool to describe the spatial and temporal variability flow regime. We found significant declining trends in October flows, and low flow indicators; however, no significant trend was found in rainfall. Land use and flow regulation are larger drivers of temporal changes in streamflow than climatic forces in the basin.
J. M. Campbell, P. Jordan, and J. Arnscheidt
Hydrol. Earth Syst. Sci., 19, 453–464, https://doi.org/10.5194/hess-19-453-2015, https://doi.org/10.5194/hess-19-453-2015, 2015
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High-resolution phosphorus and flow data were used to gauge the effects of diffuse (soil P) and point source (septic tank system) mitigation measures in two flashy headwater river catchments. Over 4 years the data indicated an overall increase in P concentration in defined high flow ranges and low flow P concentration showed little change. The work indicates fractured responses to catchment management advice and mitigation which were also affected by variations in seasonal hydrometeorology.
J. Audet, L. Martinsen, B. Hasler, H. de Jonge, E. Karydi, N. B. Ovesen, and B. Kronvang
Hydrol. Earth Syst. Sci., 18, 4721–4731, https://doi.org/10.5194/hess-18-4721-2014, https://doi.org/10.5194/hess-18-4721-2014, 2014
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The mitigation of excess nitrogen and phosphorus in river waters requires costly measures. Therefore it is essential to use reliable monitoring methods to select adequate mitigation strategies. Here we show that more development is needed before passive samplers can be considered as reliable alternative for sampling nutrients in stream. We also showed that although continuous sampling is expensive, its reliability precludes unnecessarily high implementation costs of mitigation measures.
C. Comina, M. Lasagna, D. A. De Luca, and L. Sambuelli
Hydrol. Earth Syst. Sci., 18, 3195–3203, https://doi.org/10.5194/hess-18-3195-2014, https://doi.org/10.5194/hess-18-3195-2014, 2014
M. Rusca, J. Heun, and K. Schwartz
Hydrol. Earth Syst. Sci., 16, 2749–2757, https://doi.org/10.5194/hess-16-2749-2012, https://doi.org/10.5194/hess-16-2749-2012, 2012
J. Rozemeijer, C. Siderius, M. Verheul, and H. Pomarius
Hydrol. Earth Syst. Sci., 16, 2405–2415, https://doi.org/10.5194/hess-16-2405-2012, https://doi.org/10.5194/hess-16-2405-2012, 2012
F. Jørgensen, W. Scheer, S. Thomsen, T. O. Sonnenborg, K. Hinsby, H. Wiederhold, C. Schamper, T. Burschil, B. Roth, R. Kirsch, and E. Auken
Hydrol. Earth Syst. Sci., 16, 1845–1862, https://doi.org/10.5194/hess-16-1845-2012, https://doi.org/10.5194/hess-16-1845-2012, 2012
J. Lange, S. Husary, A. Gunkel, D. Bastian, and T. Grodek
Hydrol. Earth Syst. Sci., 16, 715–724, https://doi.org/10.5194/hess-16-715-2012, https://doi.org/10.5194/hess-16-715-2012, 2012
T. T. Jin, B. J. Fu, G. H. Liu, and Z. Wang
Hydrol. Earth Syst. Sci., 15, 2519–2530, https://doi.org/10.5194/hess-15-2519-2011, https://doi.org/10.5194/hess-15-2519-2011, 2011
T. A. Endreny and M. M. Soulman
Hydrol. Earth Syst. Sci., 15, 2119–2126, https://doi.org/10.5194/hess-15-2119-2011, https://doi.org/10.5194/hess-15-2119-2011, 2011
N. Pasquale, P. Perona, P. Schneider, J. Shrestha, A. Wombacher, and P. Burlando
Hydrol. Earth Syst. Sci., 15, 1197–1212, https://doi.org/10.5194/hess-15-1197-2011, https://doi.org/10.5194/hess-15-1197-2011, 2011
B. M. Teklu, H. Tekie, M. McCartney, and S. Kibret
Hydrol. Earth Syst. Sci., 14, 2595–2603, https://doi.org/10.5194/hess-14-2595-2010, https://doi.org/10.5194/hess-14-2595-2010, 2010
T. Raziei, I. Bordi, L. S. Pereira, and A. Sutera
Hydrol. Earth Syst. Sci., 14, 1919–1930, https://doi.org/10.5194/hess-14-1919-2010, https://doi.org/10.5194/hess-14-1919-2010, 2010
S. L. Noorduijn, K. R. J. Smettem, R. Vogwill, and A. Ghadouani
Hydrol. Earth Syst. Sci., 13, 2095–2104, https://doi.org/10.5194/hess-13-2095-2009, https://doi.org/10.5194/hess-13-2095-2009, 2009
Cited articles
Alexandre, J.: Le bilan de l'eau dans le miombo (forêt claire
tropicale), Bulletein de la Société Géographie du Liège, 13, 107–126, 1977.
Allen, R. G., Pereira, L. S., Raes, D., and Smith, M.: FAO Irrigation and
Drainage Paper No. 56 – Crop Evapotranspiration, FAO, Rome, 56 pp., https://www.fao.org/3/x0490e/x0490e00.htm (last access: 20 February 2019), 1998.
Angus, D. E. and Watts, P. J.: Evapotranspiration - How good is the Bowen
ratio method?, Agr. Water Manage., 8, 133–150, https://doi.org/10.1016/0378-3774(84)90050-7, 1984.
Barr, A. G., King, K. M., Gillespie, T. J., Den Hartog, G., and Neumann, H. H.: A comparison of bowen ratio and eddy correlation sensible and latent
heat flux measurements above deciduous forest, Bound.-Lay. Meteorol., 71,
21–41, 1994.
Bastiaanssen, W. G. M., Cheema, M. J. M., Immerzeel, W. W., Miltenburg, I. J., and Pelgrum, H.: Surface energy balance and actual evapotranspiration of the transboundary Indus Basin estimated from satellite measurements and the ETLook model, Water Resour. Res., 48, W11512, https://doi.org/10.1029/2011WR010482, 2012.
Blatchford, M. L., Mannaerts, C. M., Njuki, S. M., Nouri, H., Zeng, Y., Pelgrum, H., Wonink, S., and Karimi, P.: Evaluation of WaPOR V2 evapotranspiration products across Africa, Hydrol. Process., 34, 3200–3221, https://doi.org/10.1002/hyp.13791, 2020.
Bowen, I. S.: The ratio of heat losses by conduction and by evaporation from
any water surface, Phys. Rev., 27, 779–787, https://doi.org/10.1103/PhysRev.27.779, 1926.
Brust, C., Kimball, J. S., Maneta, M. P., Jencso, K., He, M., and Reichle, R. H.: Using SMAP Level-4 soil moisture to constrain MOD16 evapotranspiration over the contiguous USA, Remote Sens. Environ., 255, 112277, https://doi.org/10.1016/j.rse.2020.112277, 2021.
Buttar, N. A., Yongguang, H., Shabbir, A., Lakhiar, I. A., Ullah, I., Ali, A., Aleem, M., and Yasin, M. A.: Estimation of evapotranspiration using
Bowen ratio method, IFAC-PapersOnLine, 51, 807–810, https://doi.org/10.1016/j.ifacol.2018.08.096, 2018.
Chidumayo, E. N.: Phenology and nutrition of miombo woodland trees in Zambia, Trees, 9, 67–72, https://doi.org/10.1007/BF00202124, 1994.
Chidumayo, E. N.: Climate and Phenology of Savanna Vegetation in Southern
Africa, J. Veget. Sci., 12, 347–354, https://doi.org/10.2307/3236848, 2001.
Chidumayo, E. N. and Frost, P.: Population biology of miombo trees, in: The
miombo in transition: woodlands and welfare in Africa, edited by: Campbell, B., CIFOR, Bogor, Indonesia, ISBN 979-8764-07-2, 1996.
Cho, J., Oki, T., Yeh, P. J. F., Kim, W., Kanae, S., and Otsuki, K.: On the
relationship between the Bowen ratio and the near-surface air temperature,
Theor. Appl. Climatol., 108, 135–145, https://doi.org/10.1007/s00704-011-0520-y, 2012.
Coenders-Gerrits, M., Schilperoort, B., and Jiménez-Rodríguez, C.:
Evaporative Processes on Vegetation: An Inside Look, in: Precipitation Partitioning by Vegetation: A Global Synthesis, edited by: Van Stan II, J. T., Gutmann, E., and Friesen, J., Springer International Publishing, Cham, 35–48, https://doi.org/10.1007/978-3-030-29702-2_3, 2020.
Dash, P., Göttsche, F. M., Olesen, F. S., and Fischer, H.: Land surface
temperature and emissivity estimation from passive sensor data: Theory and
practice-current trends, Int. J. Remote Sens., 23, 2563–2594, https://doi.org/10.1080/01431160110115041, 2002.
des Tombe, B., Schilperoort, B., and Bakker, M.: Estimation of temperature and associated uncertainty from fiber-optic raman-spectrum distributed
temperature sensing, Sensors, 20, 2235, https://doi.org/10.3390/s20082235, 2020.
des Tombe, B. F. and Schilperoort, B.: Dtscalibration Python package for calibrating distributed temperature sensing measurements (v1.1.2), Zenodo [code], https://doi.org/10.5281/zenodo.7111585, 2022.
Dile, Y. T., Ayana, E. K., Worqlul, A. W., Xie, H., Srinivasan, R., Lefore, N., You, L., and Clarke, N.: Evaluating satellite-based evapotranspiration estimates for hydrological applications in data-scarce regions: A case in Ethiopia, Sci. Total Environ., 743, 140702, https://doi.org/10.1016/j.scitotenv.2020.140702, 2020.
Dzikiti, S., Jovanovic, N. Z., Bugan, R., Israel, S., and Le Maitre, D. C.:
Measurement and modelling of evapotranspiration in three fynbos vegetation
types, Water SA, 40, 189–198, https://doi.org/10.4314/wsa.v40i2.1, 2014.
Ernst, W. and Walker, B. H.: Studies on the hydrature of trees in miombo
woodland in South Central Africa, J. Ecol., 61, 667–673, 1973.
Euser, T., Luxemburg, W. M. J., Everson, C. S., Mengistu, M. G., Clulow, A.
D., and Bastiaanssen, W. G. M.: A new method to measure Bowen ratios using
high-resolution vertical dry and wet bulb temperature profiles, Hydrol. Earth Syst. Sci., 18, 2021–2032, https://doi.org/10.5194/hess-18-2021-2014, 2014.
Everson, C. S.: The water balance of a first order catchment in the montane
grasslands of South Africa, J. Hydrol., 241, 110–123, https://doi.org/10.1016/S0022-1694(00)00376-0, 2001.
FAO.:WaPOR Database Methodology: Level 1 Data, in: Remote Sensing for Water
Productivity Technical Report: Methodology Series, FAO, http://www.fao.org/fileadmin/user_upload/faoweb/RS-WP/pdf_files/Web_WaPOR-beta_Methodology_document_Level1.pdf
(last access: 20 June 2022), 2018.
Foken, T., Aubinet, M., and Leuning, R.: Eddy Covariance, in: Eddy Covariance: A Practical Guide to Measurement and Data Analysis, Springer Atmospheric Sciences, edited by: Aubinet, M., Vesala, T., and Papale, D., Springer Netherlands, Dordrecht, https://doi.org/10.1007/978-94-007-2351-1, 2012.
Friedl, M., Gray, J., and Sulla-Menashe, D.: MCD12Q2 MODIS/Terra+Aqua Land
Cover Dynamics Yearly L3 Global 500 m SIN Grid V006 [Data set], NASA EOSDIS Land Processes DAAC [data set], https://doi.org/10.5067/MODIS/MCD12Q2.006, 2019.
Friedl, M., Gray, J., and Sulla-Menashe, D.: MCD12Q2 MODIS/Terra+Aqua Land Cover Dynamics Yearly L3 Global 500 m SIN Grid V06, NASA EOSDIS Land Processes DAAC [data set], https://doi.org/10.5067/MODIS/MCD12Q2.061, 2022.
Frost, P.: The ecology of miombo woodlands, in: The miombo in Transition: Woodlands and Welfare in Africa, edited by: Campbell, B., Center for International Forestry Research, Bogor, Indonesia, http://books.google.com/books?hl=nl&lr=&id=rpildJJVdU4C&pgis=1 (last access: 20 December 2021), 1996.
Fuller, D. O.: Canopy Phenology of Some Mopane and miombo woodlands in Eastern Zambia, Global Ecol. Biogeogr., 8, 199–209, https://doi.org/10.1046/j.1365-2699.1999.00130.x, 1999.
Fuller, D. O. and Prince, S. D.: Rainfall and foliar dynamics in tropical Southern Africa: Potential impacts of global climatic change on savanna vegetation, Climatic Change, 33, 69–96, https://doi.org/10.1007/BF00140514, 1996.
Gokmen, M., Vekerdy, Z., Verhoef, A., Verhoef, W., Batelaan, O., and van der Tol, C.: Integration of soil moisture in SEBS for improving evapotranspiration estimation under water stress conditions, Remote Sens.
Environ., 121, 261–274, https://doi.org/10.1016/j.rse.2012.02.003, 2012.
Gray, J., Sulla-Menashe, D., and Friedl, M. A.: MODIS Land Cover Dynamics
(MCD12Q2) Product. User Guide Collection 6, 6, 8, https://modis-land.gsfc.nasa.gov/pdf/MCD12Q2_Collection6_UserGuide.pdf (last access: 20 June 2022), 2019.
Guan, K., Wood, E. F., Medvigy, D., Kimball, J., Pan, M., Caylor, K. K.,
Sheffield, J., Xu, X., and Jones, O. M.: Phenology of African Savannas and woodlands, J. Geophys. Res.-Biogeo., 119, 1652–1669, https://doi.org/10.1002/2013JG002572, 2014.
Gumbo, D. J., Dumas-Johansen, M., Muir, G., Boerstler, F., and Xia, Z.:
Sustainable management of miombo woodlands-Food security, nutrition and wood
energy, in Food security, nutrition and wood energy, FAO,
https://www.fao.org/publications (last access: 20 June 2022), 2018.
Hachigonta, S. and Reason, C.: Interannual variability in dry and wet spell characteristics over Zambia, Clim. Res., 32, 49–62, https://doi.org/10.3354/cr032049, 2006.
Helsel, D. R., Hirsch, R. M., Ryberg, K. R., Archfield, S. A., and Gilroy,
E. J.: Statistical Methods in Water Resources Techniques and Methods 4 –
A3, USGS Techniques and Methods, USGS, p. 458, https://doi.org/10.3133/tm4a3, 2020.
Hirschi, M., Michel, D., Lehner, I., and Seneviratne, S. I.: A site-level comparison of lysimeter and eddy covariance flux measurements of evapotranspiration, Hydrol. Earth Syst. Sci., 21, 1809–1825, https://doi.org/10.5194/hess-21-1809-2017, 2017.
Hunink, J. E., Terink, W., and Contreras, S. D. P.: Scoping Assessment of Erosion Levels for the Mahale region, Lake Tanganyika, Tanzania, Vol. 31, https://www.futurewater.nl/ (last access: 20 December 2021), 2015.
Jarmain, C., Everson, C. S., Savage, M. J., Mengistu, M. G., Clulow, A. D.,
Walker, S., and Gush, M. B.: Refining tools for evaporation monitoring in
support of water resources management, Report No. 1567/1/08, SA Water Research Commission, https://www.researchgate.net/publication/259475917_Refining_tools_for_evaporation_monitoring_in_support_of_water_resources_management
(last access: 10 March 2023), 2009.
Jeffers, J. N. and Boaler, S. B.: Ecology of a miombo site. Lupa North Woodland Reserve, Tanzania. I. Weather and plant growth, 1962–64, Ecology, 54, 447–463, 1966.
Liu, H., Randerson, J. T., Lindfors, J., Massman, W. J., and Foken, T.: Consequences of incomplete surface energy balance closure for CO2 fluxes from open-path CO2/H2O infrared gas analysers, Bound.-Lay. Meteorol., 120, 65–85, 2006.
Ma, X., Feng, Q., Su, Y., Yu, T., and Jin, H.: Forest Evapotranspiration and Energy Flux Partitioning Based on Eddy Covariance Methods in an Arid Desert Region of Northwest China, Adv. Meteorol., 2017, 1–10, https://doi.org/10.1155/2017/1619047, 2017.
Martens, B., Miralles, D. G., Lievens, H., Van Der Schalie, R., De Jeu, R.
A. M., Fernández-Prieto, D., Beck, H. E., Dorigo, W. A., and Verhoest,
N. E. C.: GLEAM v3: Satellite-based land evaporation and root-zone soil
moisture, Geosci. Model Dev., 10, 1903–1925, https://doi.org/10.5194/gmd-10-1903-2017, 2017.
McCaughey, H. J.: Spatial Variability of Net Radiation and Soil Heat Flux
Desnity on Two Logged Sites at Montmoreney, Quebec, J. Appl. Meteorol., 21, 777–787, 1982.
Meter Group AG.: Atmos 41, in: Manual, München,
http://library.metergroup.com/Manuals/20635_ATMOS41_Manual_Web.pdf (last access: 20 June 2022), 2020.
Miralles, D. G., De Jeu, R. A. M., Gash, J. H., Holmes, T. R. H., and Dolman, A. J.: Magnitude and variability of land evaporation and its components at the global scale, Hydrol. Earth Syst. Sci., 15, 967–981, https://doi.org/10.5194/hess-15-967-2011, 2011a.
Miralles, D. G., Holmes, T. R. H., de Jeu, R. A. M., Gash, J. H., Meesters,
A. G. C. A., and Dolman, A. J.: Global land-surface evaporation estimated from satellite-based observations, Hydrol. Earth Syst. Sci., 15, 453–469, https://doi.org/10.5194/hess-15-453-2011, 2011b.
Monteith, J. L.: Evaporation and environment, in: Symposia of the Society for Experimental Biology, 205–234, https://repository.rothamsted.ac.uk/item/8v5v7 (last access: 20 June 2021), 1965.
Mu, Q., Zhao, M., and Running, S. W.: Improvements to a MODIS global terrestrial evapotranspiration algorithm, Remote Sens. Environ., 115, 1781–1800, https://doi.org/10.1016/j.rse.2011.02.019, 2011.
Myneni, R., Knyazikhin, Y., and Park, T.: MCD15A2H MODIS/Terra+Aqua Leaf Area Index/FPAR 8-day L4 Global 500 m SIN Grid V06, NASA EOSDIS Land Processes DAAC [data set], https://doi.org/10.5067/MODIS/MCD15A2H.061, 2021.
NASA: Global Subsets Tool: MODIS/VIIRS Land Products, https://modis.ornl.gov/globalsubset/, last access: 20 February 2023.
Novick, K. A., Ficklin, D. L., Stoy, P. C., Williams, C. A., Bohrer, G.,
Oishi, A. C., Papuga, S. A., Blanken, P. D., Noormets, A., Sulman, B. N.,
Scott, R. L., Wang, L., and Phillips, R. P.: The increasing importance of
atmospheric demand for ecosystem water and carbon fluxes, Nat. Clim. Change, 6, 1023–1027, https://doi.org/10.1038/nclimate3114, 2016.
Olson, D. M., Dinerstein, E., Wikramanayake, E. D., Burgess, N. D., Powell,
G. V. N., Underwood, E. C., D'Amico, J. A., Itoua, I., Strand, H. E., Morrison, J. C., Loucks, C. J., Allnutt, T. F., Ricketts, T. H., Kura, Y.,
Lamoreux, J. F., Wettengel, W. W., Hedao, P., and Kassem, K. R.: Terrestrial ecoregions of the world: A new map of life on Earth. BioScience, 51, 933–938, https://doi.org/10.1641/0006-3568(2001)051[0933:TEOTWA]2.0.CO;2, 2001.
ORNL DAAC: MODIS and VIIRS Land Products Global Subsetting and Visualization Tool, Subset obtained for MCD12Q2 product at [−12.76252], [32.48406], time period: [31-12-2020] to [31-12-2021], and subset size: [4] × [4] km, ORNL DAAC, Oak Ridge, Tennessee, USA [data set], https://doi.org/10.3334/ORNLDAAC/1379 2018.
Ramoelo, A., Dzikiti, S., Van Deventer, H., Maherry, A., Cho, M. A., and Gush, M.: Potential to monitor plant stress using remote sensing tools,
J. Arid Environ., 113, 134–144, https://doi.org/10.1016/j.jaridenv.2014.09.003, 2015.
Savage, M. J., Everson, C. S., and Metelerkamp, B. R.: Evaporation measurement above vegetated surfaces using micrometeorolo-gical techniques, Report No. 349/1/97, SA Water Research Commission, https://www.wrc.org.za/wpcontent/uploads/mdocs/349-1-97.pdf (last access: 10 March 2023), 1997.
Savory, B. M.: Site quality and tree root morphology in Northern Rhodesia, Rhodes. J. Agricult. Res., 1, 55–64, 1963.
Schilperoort, B., Coenders-Gerrits, M., Luxemburg, W., Jiménez Rodríguez, C., Cisneros Vaca, C., and Savenije, H.: Technical note: Using distributed temperature sensing for Bowen ratio evaporation measurements, Hydrol. Earth Syst. Sci., 22, 819–830, https://doi.org/10.5194/hess-22-819-2018, 2018.
Schilperoort, B., Coenders-Gerrits, M., Jiménez Rodríguez, C., van der Tol, C., van de Wiel, B., and Savenije, H.: Decoupling of a Douglas fir canopy: a look into the subcanopy with continuous vertical temperature
profiles, Biogeosciences, 17, 6423–6439, https://doi.org/10.5194/bg-17-6423-2020, 2020.
Senay, G. B., Savoca, M. E., Maupin, M. A., Kenny, J. F., and Perry, C. A.:
Actual Evapotranspiration Modeling Using the Operational Simplified Surface
Energy Balance (SSEBop) Approach, US Geological Survey Scientific Investigations Report 2013-5126, US Geological Survey, p. 16, http://pubs.usgs.gov/sir/2013/5126 (last access: 20 June 2022), 2013.
Silixa Ltd.: Silixa XT-DTS Hardware Manual Version 1.3, https://silixa.com/ (last access: 20 December 2020), 2016.
Spittlehouse, D. L. and Black, T. A.: Evaluation of the bowen ratio/energy
balance method for determining forest evapotranspiration, Atmos.-Ocean, 18, 98–116, https://doi.org/10.1080/07055900.1980.9649081, 1980.
Sriwongsitanon, N., Gao, H., Savenije, H. H. G., Maekan, E., Saengsawang, S., and Thianpopirug, S.: Comparing the Normalized Difference Infrared Index (NDII) with root zone storage in a lumped conceptual model, Hydrol. Earth Syst. Sci., 20, 3361–3377, https://doi.org/10.5194/hess-20-3361-2016, 2016.
Stöckli, R., Rutishauser, T., Baker, I., Liniger, M. A., and Denning, A. S.: A Global Reanalysis of Vegetation Phenology, J. Geophys. Res.-Biogeo., 116, G03020, https://doi.org/10.1029/2010JG001545, 2011.
Sutanto, S. J., Wenninger, J., Coenders-Gerrits, A. M. J., and Uhlenbrook, S.: Partitioning of evaporation into transpiration, soil evaporation and interception: a comparison between isotope measurements and a HYDRUS-1D model, Hydrol. Earth Syst. Sci., 16, 2605–2616, https://doi.org/10.5194/hess-16-2605-2012, 2012.
Teuling, A. J.: A Forest Evapotranspiration Paradox Investigated Using Lysimeter Data, Vadose Zone J., 17, 170031, https://doi.org/10.2136/vzj2017.01.0031, 2018.
Tian, F., Wigneron, J. P., Ciais, P., Chave, J., Ogée, J., Peñuelas,
J., Ræbild, A., Domec, J. C., Tong, X., Brandt, M., Mialon, A.,
Rodriguez-Fernandez, N., Tagesson, T., Al-Yaari, A., Kerr, Y., Chen, C.,
Myneni, R. B., Zhang, W., Ardö, J., and Fensholt, R.: Coupling of
ecosystem-scale plant water storage and leaf phenology observed by satellite, Nat. Ecol. Evol., 2, 1428–1435, https://doi.org/10.1038/s41559-018-0630-3, 2018.
Timberlake, J., Chidumayo, E., and Sawadogo, L.: Distribution and Characteristics of African Dry Forests and Woodlands, in: The Dry Forests and Woodlands of Africa: Managing for Products and Services, edited by: Chidumayo, E. N. and Gumbo, D. J., Earthscan, 1–288, https://doi.org/10.4324/9781849776547, 2010.
van de Giesen, N., Steele-Dunne, S. C., Jansen, J., Hoes, O., Hausner, M.
B., Tyler, S., and Selker, J.: Double-ended calibration of fiber-optic raman spectra distributed temperature sensing data, Sensors, 12, 5471–5485, https://doi.org/10.3390/s120505471, 2012.
van der Ent, R. J., Wang-Erlandsson, L., Keys, P. W., and Savenije, H. H. G.: Contrasting roles of interception and transpiration in the hydrological
cycle – Part 2: Moisture recycling, Earth Syst. Dynam., 5, 471–489, https://doi.org/10.5194/esd-5-471-2014, 2014.
Van Der Meulen, M. W. J. and Klaassen, W.: Soil heat flux measurements in an open forest, Phys. Chem. Earth, 21, 101–105, https://doi.org/10.1016/S0079-1946(97)85568-1, 1996.
Vermote, E. and Wolfe, R.: NASA GSFC and MODAPS SIPS – NASA: MYD09GA MODIS/Aqua Surface Reflectance Daily L2G Global 1 km and 500 m SIN Grid, NASA LP DAAC [data set], https://doi.org/10.5067/MODIS/MYD09GA.006, 2015.
Vinya, R., Malhi, Y., Brown, N. D., Fisher, J. B., Brodribb, T., and Aragão, L. E. O. C.: Seasonal changes in plant-water relations influence patterns of leaf display in Miombo woodlands: Evidence of water conservative strategies, Tree Physiol., 39, 104–112, https://doi.org/10.1093/treephys/tpy062, 2018.
Weerasinghe, I, Bastiaanssen,W., Mul, M., Jia, L., and Griensven, A.: Can We Trust Remote Sensing Evapotranspiration Products over Africa, Hydrol. Earth Syst. Sci., 24, 1565–1586, https://doi.org/10.5194/hess-24-1565-2020, 2020.
White, F.: The Vegetation of Africa; a descriptive memoir to accompany the UNESCO/AETFAT/UNSO vegetation map of Africa, UNESCO, Paris, https://unesdoc.unesco.org/ark:/48223/pf0000058054 (last access: 20 February 2019), 1983.
Xing, Z., Chow, L., Meng, F. R., Rees, H. W., Steve, L., and Monteith, J.: Validating Evapotranspiraiton Equations Using Bowen Ratio in New Brunswick, Maritime, Canada, Sensors, 8, 412–428, https://doi.org/10.3390/s8010412, 2008.
Zhang, X., Friedl, M. A., Schaaf, C. B., Strahler, A. H., Hodges, J. C. F.,
Gao, F., Reed, B. C., and Huete, A.: Monitoring vegetation phenology using
MODIS, Remote Sens. Environ., 84, 471–475, https://doi.org/10.1016/S0034-4257(02)00135-9, 2003.
Zimba, H., Coenders-Gerrits, M., Kawawa, B., Savenije, H., Nyambe, I., and Winsemius, H.: Variations in canopy cover and its relationship with canopy water and temperature in the miombo woodland based on satellite data, Hydrology, 7, 58, https://doi.org/10.3390/HYDROLOGY7030058, 2020.
Zimba, H., Coenders, M., Savenije, H. H. G., van de Giesen, N., and Hulsman, P.: ZAMSECUR Project Field Data Mpika, Zambia (Version 2), 4TU.ResearchData [data set], https://doi.org/10.4121/19372352.V2, 2022a.
Zimba, H., Savenije, H. H. G., van de Giesen, N., Coenders, M., and Schilperoort, B.: ZAMSECUR Project Miombo Forest, Zambia, Southern Africa (Version 1), 4TU.ResearchData [data set], https://doi.org/10.4121/20492934.V1, 2022b.
Zimba, H., Coenders-Gerrits, M., Banda, K., Hulsman, P., van de Giesen, N., Nyambe, I., and Savenije, H. H. G.: On the importance of phenology in the evaporative process of the Miombo Woodland: Could it be why satellite-based evaporation estimates differ?, Hydrol. Earth Syst. Sci. Discuss. [preprint], https://doi.org/10.5194/hess-2023-39, in review, 2023.
Short summary
Miombo woodland plants continue to lose water even during the driest part of the year. This appears to be facilitated by the adapted features such as deep rooting (beyond 5 m) with access to deep soil moisture, potentially even ground water. It appears the trend and amount of water that the plants lose is correlated more to the available energy. This loss of water in the dry season by miombo woodland plants appears to be incorrectly captured by satellite-based evaporation estimates.
Miombo woodland plants continue to lose water even during the driest part of the year. This...
