Articles | Volume 26, issue 15
https://doi.org/10.5194/hess-26-4209-2022
© Author(s) 2022. 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-26-4209-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
12 Aug 2022
Research article |
| 12 Aug 2022
| 12 Aug 2022
Hydrology and riparian forests drive carbon and nitrogen supply and DOC : NO3− stoichiometry along a headwater Mediterranean stream
Institute of Geography and Geoecology, Karlsruhe Institute of
Technology (KIT), Karlsruhe, 76131, Germany
Integrative Freshwater Ecology Group, Centre for Advanced Studies of
Blanes, Spanish National Research Council (CEAB-CSIC), Blanes, 17300, Spain
Anna Lupon
Integrative Freshwater Ecology Group, Centre for Advanced Studies of
Blanes, Spanish National Research Council (CEAB-CSIC), Blanes, 17300, Spain
Eugènia Martí
Integrative Freshwater Ecology Group, Centre for Advanced Studies of
Blanes, Spanish National Research Council (CEAB-CSIC), Blanes, 17300, Spain
Susana Bernal
Integrative Freshwater Ecology Group, Centre for Advanced Studies of
Blanes, Spanish National Research Council (CEAB-CSIC), Blanes, 17300, Spain
Related authors
Anna Lupon, José L. J. Ledesma, and Susana Bernal
Hydrol. Earth Syst. Sci., 22, 4033–4045, https://doi.org/10.5194/hess-22-4033-2018, https://doi.org/10.5194/hess-22-4033-2018, 2018
Short summary
Short summary
We used the PERSiST model to explore the role of riparian evapotranspiration (ET) in regulating streamflow in Mediterranean regions. Riparian ET was essential for understanding streamflow dynamics, especially in summer. Moreover, climate change simulations showed that the contribution of riparian ET to annual water budgets will increase in the future. We must include riparian zones in hydrological models in order to establish proper management strategies in water-limited regions.
Stephen Oni, Martyn Futter, Jose Ledesma, Claudia Teutschbein, Jim Buttle, and Hjalmar Laudon
Hydrol. Earth Syst. Sci., 20, 2811–2825, https://doi.org/10.5194/hess-20-2811-2016, https://doi.org/10.5194/hess-20-2811-2016, 2016
Short summary
Short summary
This paper presents an important framework to improve hydrologic projections in cold regions. Hydrologic modelling/projections are often based on model calibration to long-term data. Here we used dry and wet years as a proxy to quantify uncertainty in projecting hydrologic extremes. We showed that projections based on long-term data could underestimate runoff by up to 35% in boreal regions. We believe the hydrologic modelling community will benefit from new insights derived from this study.
J. L. J. Ledesma, T. Grabs, M. N. Futter, K. H. Bishop, H. Laudon, and S. J. Köhler
Biogeosciences, 10, 3849–3868, https://doi.org/10.5194/bg-10-3849-2013, https://doi.org/10.5194/bg-10-3849-2013, 2013
Anna Lupon, Stefan Willem Ploum, Jason Andrew Leach, Lenka Kuglerová, and Hjalmar Laudon
Hydrol. Earth Syst. Sci., 27, 613–625, https://doi.org/10.5194/hess-27-613-2023, https://doi.org/10.5194/hess-27-613-2023, 2023
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Discrete riparian inflow points (DRIPs) transport dissolved organic carbon (DOC) from large areas to discrete sections of streams, yet the mechanisms by which DRIPs affect stream DOC concentration, cycling, and export are still unknown. Here, we tested four models that account for different hydrologic and biological representations to show that DRIPs generally reduce DOC exports by either diluting stream DOC (snowmelt period) or promoting aquatic metabolism (summer).
Hang Wen, Julia Perdrial, Benjamin W. Abbott, Susana Bernal, Rémi Dupas, Sarah E. Godsey, Adrian Harpold, Donna Rizzo, Kristen Underwood, Thomas Adler, Gary Sterle, and Li Li
Hydrol. Earth Syst. Sci., 24, 945–966, https://doi.org/10.5194/hess-24-945-2020, https://doi.org/10.5194/hess-24-945-2020, 2020
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Lateral carbon fluxes from terrestrial to aquatic systems remain central uncertainties in determining ecosystem carbon balance. This work explores how temperature and hydrology control production and export of dissolved organic carbon (DOC) at the catchment scale. Results illustrate the asynchrony of DOC production, controlled by temperature, and export, governed by flow paths; concentration–discharge relationships are determined by the relative contribution of shallow versus groundwater flow.
Adam S. Ward, Steven M. Wondzell, Noah M. Schmadel, Skuyler Herzog, Jay P. Zarnetske, Viktor Baranov, Phillip J. Blaen, Nicolai Brekenfeld, Rosalie Chu, Romain Derelle, Jennifer Drummond, Jan H. Fleckenstein, Vanessa Garayburu-Caruso, Emily Graham, David Hannah, Ciaran J. Harman, Jase Hixson, Julia L. A. Knapp, Stefan Krause, Marie J. Kurz, Jörg Lewandowski, Angang Li, Eugènia Martí, Melinda Miller, Alexander M. Milner, Kerry Neil, Luisa Orsini, Aaron I. Packman, Stephen Plont, Lupita Renteria, Kevin Roche, Todd Royer, Catalina Segura, James Stegen, Jason Toyoda, Jacqueline Hager, and Nathan I. Wisnoski
Hydrol. Earth Syst. Sci., 23, 5199–5225, https://doi.org/10.5194/hess-23-5199-2019, https://doi.org/10.5194/hess-23-5199-2019, 2019
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The movement of water and solutes between streams and their shallow, connected subsurface is important to many ecosystem functions. These exchanges are widely expected to vary with stream flow across space and time, but these assumptions are seldom tested across basin scales. We completed more than 60 experiments across a 5th-order river basin to document these changes, finding patterns in space but not time. We conclude space-for-time and time-for-space substitutions are not good assumptions.
Adam S. Ward, Jay P. Zarnetske, Viktor Baranov, Phillip J. Blaen, Nicolai Brekenfeld, Rosalie Chu, Romain Derelle, Jennifer Drummond, Jan H. Fleckenstein, Vanessa Garayburu-Caruso, Emily Graham, David Hannah, Ciaran J. Harman, Skuyler Herzog, Jase Hixson, Julia L. A. Knapp, Stefan Krause, Marie J. Kurz, Jörg Lewandowski, Angang Li, Eugènia Martí, Melinda Miller, Alexander M. Milner, Kerry Neil, Luisa Orsini, Aaron I. Packman, Stephen Plont, Lupita Renteria, Kevin Roche, Todd Royer, Noah M. Schmadel, Catalina Segura, James Stegen, Jason Toyoda, Jacqueline Hager, Nathan I. Wisnoski, and Steven M. Wondzell
Earth Syst. Sci. Data, 11, 1567–1581, https://doi.org/10.5194/essd-11-1567-2019, https://doi.org/10.5194/essd-11-1567-2019, 2019
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Studies of river corridor exchange commonly focus on characterization of the physical, chemical, or biological system. As a result, complimentary systems and context are often lacking, which may limit interpretation. Here, we present a characterization of all three systems at 62 sites in a 5th-order river basin, including samples of surface water, hyporheic water, and sediment. These data will allow assessment of interacting processes in the river corridor.
Anna Lupon, José L. J. Ledesma, and Susana Bernal
Hydrol. Earth Syst. Sci., 22, 4033–4045, https://doi.org/10.5194/hess-22-4033-2018, https://doi.org/10.5194/hess-22-4033-2018, 2018
Short summary
Short summary
We used the PERSiST model to explore the role of riparian evapotranspiration (ET) in regulating streamflow in Mediterranean regions. Riparian ET was essential for understanding streamflow dynamics, especially in summer. Moreover, climate change simulations showed that the contribution of riparian ET to annual water budgets will increase in the future. We must include riparian zones in hydrological models in order to establish proper management strategies in water-limited regions.
Susana Bernal, Anna Lupon, Núria Catalán, Sara Castelar, and Eugènia Martí
Hydrol. Earth Syst. Sci., 22, 1897–1910, https://doi.org/10.5194/hess-22-1897-2018, https://doi.org/10.5194/hess-22-1897-2018, 2018
Sílvia Poblador, Anna Lupon, Santiago Sabaté, and Francesc Sabater
Biogeosciences, 14, 4195–4208, https://doi.org/10.5194/bg-14-4195-2017, https://doi.org/10.5194/bg-14-4195-2017, 2017
Short summary
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This study quantified, for the first time, simultaneous rates of carbon dioxide (CO2) and nitrous oxide (N2O) from a Mediterranean riparian forest. Our results showed a strong linkage between riparian hydrology, soil microbial processes, and greenhouse gas (GHG) emissions. High CO2 effluxes occurred all year long, while N2O emissions were generally low and confined to saturated soils. Overall, this study shows that riparian soils can be hotspots of GHG emissions within Mediterranean catchment.
Anna Lupon, Susana Bernal, Sílvia Poblador, Eugènia Martí, and Francesc Sabater
Hydrol. Earth Syst. Sci., 20, 3831–3842, https://doi.org/10.5194/hess-20-3831-2016, https://doi.org/10.5194/hess-20-3831-2016, 2016
Short summary
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The influence of riparian evapotranspiration (ET) on stream hydrology and chemistry is poorly understood. We investigated temporal changes in riparian ET, stream discharge and nutrient chemistry along a Mediterranean catchment. Despite being a small component of annual water budgets (4.5 %), our results highlight that riparian ET drives stream and groundwater hydrology in Mediterranean catchments and, further, question the potential of the riparian zone as a natural filter of nitrogen loads.
Stephen Oni, Martyn Futter, Jose Ledesma, Claudia Teutschbein, Jim Buttle, and Hjalmar Laudon
Hydrol. Earth Syst. Sci., 20, 2811–2825, https://doi.org/10.5194/hess-20-2811-2016, https://doi.org/10.5194/hess-20-2811-2016, 2016
Short summary
Short summary
This paper presents an important framework to improve hydrologic projections in cold regions. Hydrologic modelling/projections are often based on model calibration to long-term data. Here we used dry and wet years as a proxy to quantify uncertainty in projecting hydrologic extremes. We showed that projections based on long-term data could underestimate runoff by up to 35% in boreal regions. We believe the hydrologic modelling community will benefit from new insights derived from this study.
S. Bernal, A. Lupon, M. Ribot, F. Sabater, and E. Martí
Biogeosciences, 12, 1941–1954, https://doi.org/10.5194/bg-12-1941-2015, https://doi.org/10.5194/bg-12-1941-2015, 2015
Short summary
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Terrestrial inputs are considered the major driver of longitudinal patterns of nutrient concentration. Yet we show that longitudinal trends result from hydrological mixing with terrestrial inputs and in-stream processes. We challenge the idea that nutrient concentrations decrease downstream when in-stream net uptake is high. Conversely, in-stream processes can strongly affect stream nutrient chemistry and fluxes even in the absence of consistent longitudinal trends in nutrient concentration.
J. L. J. Ledesma, T. Grabs, M. N. Futter, K. H. Bishop, H. Laudon, and S. J. Köhler
Biogeosciences, 10, 3849–3868, https://doi.org/10.5194/bg-10-3849-2013, https://doi.org/10.5194/bg-10-3849-2013, 2013
Related subject area
Subject: Catchment hydrology | Techniques and Approaches: Theory development
Increased nonstationarity of stormflow threshold behaviors in a forested watershed due to abrupt earthquake disturbance
HESS Opinions: Are soils overrated in hydrology?
Links between seasonal suprapermafrost groundwater, the hydrothermal change of the active layer, and river runoff in alpine permafrost watersheds
Hydrologic implications of projected changes in rain-on-snow melt for Great Lakes Basin watersheds
Technical note: Isotopic fractionation of evaporating waters: effect of sub-daily atmospheric variations and eventual depletion of heavy isotopes
A hydrological framework for persistent pools along non-perennial rivers
Evidence-based requirements for perceptualising intercatchment groundwater flow in hydrological models
Droughts can reduce the nitrogen retention capacity of catchments
Explaining changes in rainfall–runoff relationships during and after Australia's Millennium Drought: a community perspective
Three hypotheses on changing river flood hazards
A multivariate-driven approach for disentangling the reduction in near-natural Iberian water resources post-1980
Event controls on intermittent streamflow in a temperate climate
Inclusion of flood diversion canal operation in the H08 hydrological model with a case study from the Chao Phraya River basin: model development and validation
Flood generation: process patterns from the raindrop to the ocean
Use of streamflow indices to identify the catchment drivers of hydrographs
Theoretical and empirical evidence against the Budyko catchment trajectory conjecture
Spatial distribution of groundwater recharge, based on regionalised soil moisture models in Wadi Natuf karst aquifers, Palestine
Barriers to mainstream adoption of catchment-wide natural flood management: a transdisciplinary problem-framing study of delivery practice
Low hydrological connectivity after summer drought inhibits DOC export in a forested headwater catchment
Rainbow color map distorts and misleads research in hydrology – guidance for better visualizations and science communication
Attribution of growing season evapotranspiration variability considering snowmelt and vegetation changes in the arid alpine basins
Event and seasonal hydrologic connectivity patterns in an agricultural headwater catchment
Exploring the role of hydrological pathways in modulating multi-annual climate teleconnection periodicities from UK rainfall to streamflow
Technical note: “Bit by bit”: a practical and general approach for evaluating model computational complexity vs. model performance
Hillslope and groundwater contributions to streamflow in a Rocky Mountain watershed underlain by glacial till and fractured sedimentary bedrock
A framework for seasonal variations of hydrological model parameters: impact on model results and response to dynamic catchment characteristics
Hydrology and beyond: the scientific work of August Colding revisited
The influence of a prolonged meteorological drought on catchment water storage capacity: a hydrological-model perspective
Hydrological and runoff formation processes based on isotope tracing during ablation period in the source regions of Yangtze River
Importance of snowmelt contribution to seasonal runoff and summer low flows in Czechia
Concentration–discharge relationships vary among hydrological events, reflecting differences in event characteristics
Recession analysis revisited: impacts of climate on parameter estimation
Understanding the effects of climate warming on streamflow and active groundwater storage in an alpine catchment: the upper Lhasa River
Technical note: An improved discharge sensitivity metric for young water fractions
Hydrological signatures describing the translation of climate seasonality into streamflow seasonality
Spatial and temporal variation in river corridor exchange across a 5th-order mountain stream network
Historic hydrological droughts 1891–2015: systematic characterisation for a diverse set of catchments across the UK
A topographic index explaining hydrological similarity by accounting for the joint controls of runoff formation
Trajectories of nitrate input and output in three nested catchments along a land use gradient
Contrasting rainfall-runoff characteristics of floods in desert and Mediterranean basins
Anthropogenic and catchment characteristic signatures in the water quality of Swiss rivers: a quantitative assessment
Using paired catchments to quantify the human influence on hydrological droughts
HESS Opinions: Socio-economic and ecological trade-offs of flood management – benefits of a transdisciplinary approach
A parsimonious transport model of emerging contaminants at the river network scale
Emergent stationarity in Yellow River sediment transport and the underlying shift of dominance: from streamflow to vegetation
A new probability density function for spatial distribution of soil water storage capacity leads to the SCS curve number method
How does initial soil moisture influence the hydrological response? A case study from southern France
Studying catchment storm response using event- and pre-event-water volumes as fractions of precipitation rather than discharge
Anatomy of simultaneous flood peaks at a lowland confluence
Including effects of watershed heterogeneity in the curve number method using variable initial abstraction
Guotao Zhang, Peng Cui, Carlo Gualtieri, Nazir Ahmed Bazai, Xueqin Zhang, and Zhengtao Zhang
Hydrol. Earth Syst. Sci., 27, 3005–3020, https://doi.org/10.5194/hess-27-3005-2023, https://doi.org/10.5194/hess-27-3005-2023, 2023
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This study used identified stormflow thresholds as a diagnostic tool to characterize abrupt variations in catchment emergent patterns pre- and post-earthquake. Earthquake-induced landslides with spatial heterogeneity and temporally undulating recovery increase the hydrologic nonstationary; thus, large post-earthquake floods are more likely to occur. This study contributes to mitigation and adaptive strategies for unpredictable hydrologic regimes triggered by abrupt natural disturbances.
Hongkai Gao, Fabrizio Fenicia, and Hubert H. G. Savenije
Hydrol. Earth Syst. Sci., 27, 2607–2620, https://doi.org/10.5194/hess-27-2607-2023, https://doi.org/10.5194/hess-27-2607-2023, 2023
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It is a deeply rooted perception that soil is key in hydrology. In this paper, we argue that it is the ecosystem, not the soil, that is in control of hydrology. Firstly, in nature, the dominant flow mechanism is preferential, which is not particularly related to soil properties. Secondly, the ecosystem, not the soil, determines the land–surface water balance and hydrological processes. Moving from a soil- to ecosystem-centred perspective allows more realistic and simpler hydrological models.
Jia Qin, Yongjian Ding, Tianding Han, Faxiang Shi, Qiudong Zhao, Yaping Chang, and Junhao Cui
EGUsphere, https://doi.org/10.5194/egusphere-2023-1394, https://doi.org/10.5194/egusphere-2023-1394, 2023
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The linkage between the seasonal hydrothermal change of active layer, suprapermafrost groundwater, and surface runoff, which has been regarded as a “black box” in hydrological analyses and simulations, is a bottleneck problem in permafrost hydrological studies. Based on field observations, this study has identified seasonal variations and causes of suprapermafrost groundwater. The linkages and framework of watershed hydrology responding to the freeze–thaw of the active layer also were explored.
Daniel T. Myers, Darren L. Ficklin, and Scott M. Robeson
Hydrol. Earth Syst. Sci., 27, 1755–1770, https://doi.org/10.5194/hess-27-1755-2023, https://doi.org/10.5194/hess-27-1755-2023, 2023
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We projected climate change impacts to rain-on-snow (ROS) melt events in the Great Lakes Basin. Decreases in snowpack limit future ROS melt. Areas with mean winter/spring air temperatures near freezing are most sensitive to ROS changes. The projected proportion of total monthly snowmelt from ROS decreases. The timing for ROS melt is projected to be 2 weeks earlier by the mid-21st century and affects spring streamflow. This could affect freshwater resources management.
Francesc Gallart, Sebastián González-Fuentes, and Pilar Llorens
Hydrol. Earth Syst. Sci. Discuss., https://doi.org/10.5194/hess-2022-427, https://doi.org/10.5194/hess-2022-427, 2023
Revised manuscript accepted for HESS
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Normally the lighter Oxygen and Hydrogen isotopes are preferably evaporated from a water body, which becomes enriched in heavy isotopes. But we observed that, in a water body subject to prolonged evaporation, some periods of heavy isotope depletion instead of enrichment happened. Furthermore, the usual models that describe the isotopy of evaporating waters may be in error if the atmospheric conditions of temperature and relative humidity are time-averaged instead of evaporation flux-weighted.
Sarah A. Bourke, Margaret Shanafield, Paul Hedley, Sarah Chapman, and Shawan Dogramaci
Hydrol. Earth Syst. Sci., 27, 809–836, https://doi.org/10.5194/hess-27-809-2023, https://doi.org/10.5194/hess-27-809-2023, 2023
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Here we present a hydrological framework for understanding the mechanisms supporting the persistence of water in pools along non-perennial rivers. Pools may collect water after rainfall events, be supported by water stored within the river channel sediments, or receive inflows from regional groundwater. These hydraulic mechanisms can be identified using a range of diagnostic tools (critiqued herein). We then apply this framework in north-west Australia to demonstrate its value.
Louisa D. Oldham, Jim Freer, Gemma Coxon, Nicholas Howden, John P. Bloomfield, and Christopher Jackson
Hydrol. Earth Syst. Sci., 27, 761–781, https://doi.org/10.5194/hess-27-761-2023, https://doi.org/10.5194/hess-27-761-2023, 2023
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Water can move between river catchments via the subsurface, termed intercatchment groundwater flow (IGF). We show how a perceptual model of IGF can be developed with relatively simple geological interpretation and data requirements. We find that IGF dynamics vary in space, correlated to the dominant underlying geology. We recommend that IGF
loss functionsmay be used in conceptual rainfall–runoff models but should be supported by perceptualisation of IGF processes and connectivities.
Carolin Winter, Tam V. Nguyen, Andreas Musolff, Stefanie R. Lutz, Michael Rode, Rohini Kumar, and Jan H. Fleckenstein
Hydrol. Earth Syst. Sci., 27, 303–318, https://doi.org/10.5194/hess-27-303-2023, https://doi.org/10.5194/hess-27-303-2023, 2023
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The increasing frequency of severe and prolonged droughts threatens our freshwater resources. While we understand drought impacts on water quantity, its effects on water quality remain largely unknown. Here, we studied the impact of the unprecedented 2018–2019 drought in Central Europe on nitrate export in a heterogeneous mesoscale catchment in Germany. We show that severe drought can reduce a catchment's capacity to retain nitrogen, intensifying the internal pollution and export of nitrate.
Keirnan Fowler, Murray Peel, Margarita Saft, Tim J. Peterson, Andrew Western, Lawrence Band, Cuan Petheram, Sandra Dharmadi, Kim Seong Tan, Lu Zhang, Patrick Lane, Anthony Kiem, Lucy Marshall, Anne Griebel, Belinda E. Medlyn, Dongryeol Ryu, Giancarlo Bonotto, Conrad Wasko, Anna Ukkola, Clare Stephens, Andrew Frost, Hansini Gardiya Weligamage, Patricia Saco, Hongxing Zheng, Francis Chiew, Edoardo Daly, Glen Walker, R. Willem Vervoort, Justin Hughes, Luca Trotter, Brad Neal, Ian Cartwright, and Rory Nathan
Hydrol. Earth Syst. Sci., 26, 6073–6120, https://doi.org/10.5194/hess-26-6073-2022, https://doi.org/10.5194/hess-26-6073-2022, 2022
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Recently, we have seen multi-year droughts tending to cause shifts in the relationship between rainfall and streamflow. In shifted catchments that have not recovered, an average rainfall year produces less streamflow today than it did pre-drought. We take a multi-disciplinary approach to understand why these shifts occur, focusing on Australia's over-10-year Millennium Drought. We evaluate multiple hypotheses against evidence, with particular focus on the key role of groundwater processes.
Günter Blöschl
Hydrol. Earth Syst. Sci., 26, 5015–5033, https://doi.org/10.5194/hess-26-5015-2022, https://doi.org/10.5194/hess-26-5015-2022, 2022
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There is serious concern that river floods are increasing. Starting from explanations discussed in public, the article addresses three hypotheses: land-use change, hydraulic structures, and climate change increase floods. This review finds that all three changes have the potential to not only increase floods, but also to reduce them. It is crucial to consider all three factors of change in flood risk management and communicate them to the general public in a nuanced way.
Amar Halifa-Marín, Miguel A. Torres-Vázquez, Enrique Pravia-Sarabia, Marc Lemus-Canovas, Pedro Jiménez-Guerrero, and Juan Pedro Montávez
Hydrol. Earth Syst. Sci., 26, 4251–4263, https://doi.org/10.5194/hess-26-4251-2022, https://doi.org/10.5194/hess-26-4251-2022, 2022
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Near-natural Iberian water resources have suddenly decreased since the 1980s. These declines have been promoted by the weakening (enhancement) of wintertime precipitation (the NAOi) in the most humid areas, whereas afforestation and drought intensification have played a crucial role in semi-arid areas. Future water management would benefit from greater knowledge of North Atlantic climate variability and reforestation/afforestation processes in semi-arid catchments.
Nils Hinrich Kaplan, Theresa Blume, and Markus Weiler
Hydrol. Earth Syst. Sci., 26, 2671–2696, https://doi.org/10.5194/hess-26-2671-2022, https://doi.org/10.5194/hess-26-2671-2022, 2022
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This study is analyses how characteristics of precipitation events and soil moisture and temperature dynamics during these events can be used to model the associated streamflow responses in intermittent streams. The models are used to identify differences between the dominant controls of streamflow intermittency in three distinct geologies of the Attert catchment, Luxembourg. Overall, soil moisture was found to be the most important control of intermittent streamflow in all geologies.
Saritha Padiyedath Gopalan, Adisorn Champathong, Thada Sukhapunnaphan, Shinichiro Nakamura, and Naota Hanasaki
Hydrol. Earth Syst. Sci., 26, 2541–2560, https://doi.org/10.5194/hess-26-2541-2022, https://doi.org/10.5194/hess-26-2541-2022, 2022
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The modelling of diversion canals using hydrological models is important because they play crucial roles in water management. Therefore, we developed a simplified canal diversion scheme and implemented it into the H08 global hydrological model. The developed diversion scheme was validated in the Chao Phraya River basin, Thailand. Region-specific validation results revealed that the H08 model with the diversion scheme could effectively simulate the observed flood diversion pattern in the basin.
Günter Blöschl
Hydrol. Earth Syst. Sci., 26, 2469–2480, https://doi.org/10.5194/hess-26-2469-2022, https://doi.org/10.5194/hess-26-2469-2022, 2022
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Sound understanding of how floods come about allows for the development of more reliable flood management tools that assist in mitigating their negative impacts. This article reviews river flood generation processes and flow paths across space scales, starting from water movement in the soil pores and moving up to hillslopes, catchments, regions and entire continents. To assist model development, there is a need to learn from observed patterns of flood generation processes at all spatial scales.
Jeenu Mathai and Pradeep P. Mujumdar
Hydrol. Earth Syst. Sci., 26, 2019–2033, https://doi.org/10.5194/hess-26-2019-2022, https://doi.org/10.5194/hess-26-2019-2022, 2022
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With availability of large samples of data in catchments, it is necessary to develop indices that describe the streamflow processes. This paper describes new indices applicable for the rising and falling limbs of streamflow hydrographs. The indices provide insights into the drivers of the hydrographs. The novelty of the work is on differentiating hydrographs by their time irreversibility property and offering an alternative way to recognize primary drivers of streamflow hydrographs.
Nathan G. F. Reaver, David A. Kaplan, Harald Klammler, and James W. Jawitz
Hydrol. Earth Syst. Sci., 26, 1507–1525, https://doi.org/10.5194/hess-26-1507-2022, https://doi.org/10.5194/hess-26-1507-2022, 2022
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The Budyko curve emerges globally from the behavior of multiple catchments. Single-parameter Budyko equations extrapolate the curve concept to individual catchments, interpreting curves and parameters as representing climatic and biophysical impacts on water availability, respectively. We tested these two key components theoretically and empirically, finding that catchments are not required to follow Budyko curves and usually do not, implying the parametric framework lacks predictive ability.
Clemens Messerschmid and Amjad Aliewi
Hydrol. Earth Syst. Sci., 26, 1043–1061, https://doi.org/10.5194/hess-26-1043-2022, https://doi.org/10.5194/hess-26-1043-2022, 2022
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Temporal distribution of groundwater recharge has been widely studied; yet, much less attention has been paid to its spatial distribution. Based on a previous study of field-measured and modelled formation-specific recharge in the Mediterranean, this paper differentiates annual recharge coefficients in a novel approach and basin classification framework for physical features such as lithology, soil and LU/LC characteristics, applicable also in other previously ungauged basins around the world.
Thea Wingfield, Neil Macdonald, Kimberley Peters, and Jack Spees
Hydrol. Earth Syst. Sci., 25, 6239–6259, https://doi.org/10.5194/hess-25-6239-2021, https://doi.org/10.5194/hess-25-6239-2021, 2021
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Human activities are causing greater and more frequent floods. Natural flood management (NFM) uses processes of the water cycle to slow the flow of rainwater, bringing together land and water management. Despite NFM's environmental and social benefits, it is yet to be widely adopted. Two environmental practitioner groups collaborated to produce a picture of the barriers to delivery, showing that there is a perceived lack of support from government and the public for NFM.
Katharina Blaurock, Burkhard Beudert, Benjamin S. Gilfedder, Jan H. Fleckenstein, Stefan Peiffer, and Luisa Hopp
Hydrol. Earth Syst. Sci., 25, 5133–5151, https://doi.org/10.5194/hess-25-5133-2021, https://doi.org/10.5194/hess-25-5133-2021, 2021
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Dissolved organic carbon (DOC) is an important part of the global carbon cycle with regards to carbon storage, greenhouse gas emissions and drinking water treatment. In this study, we compared DOC export of a small, forested catchment during precipitation events after dry and wet preconditions. We found that the DOC export from areas that are usually important for DOC export was inhibited after long drought periods.
Michael Stoelzle and Lina Stein
Hydrol. Earth Syst. Sci., 25, 4549–4565, https://doi.org/10.5194/hess-25-4549-2021, https://doi.org/10.5194/hess-25-4549-2021, 2021
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We found with a scientific paper survey (~ 1000 papers) that 45 % of the papers used rainbow color maps or red–green visualizations. Those rainbow visualizations, although attracting the media's attention, will not be accessible for up to 10 % of people due to color vision deficiency. The rainbow color map distorts and misleads scientific communication. The study gives guidance on how to avoid, improve and trust color and how the flaws of the rainbow color map should be communicated in science.
Tingting Ning, Zhi Li, Qi Feng, Zongxing Li, and Yanyan Qin
Hydrol. Earth Syst. Sci., 25, 3455–3469, https://doi.org/10.5194/hess-25-3455-2021, https://doi.org/10.5194/hess-25-3455-2021, 2021
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Previous studies decomposed ET variance in precipitation, potential ET, and total water storage changes based on Budyko equations. However, the effects of snowmelt and vegetation changes have not been incorporated in snow-dependent basins. We thus extended this method in arid alpine basins of northwest China and found that ET variance is primarily controlled by rainfall, followed by coupled rainfall and vegetation. The out-of-phase seasonality between rainfall and snowmelt weaken ET variance.
Lovrenc Pavlin, Borbála Széles, Peter Strauss, Alfred Paul Blaschke, and Günter Blöschl
Hydrol. Earth Syst. Sci., 25, 2327–2352, https://doi.org/10.5194/hess-25-2327-2021, https://doi.org/10.5194/hess-25-2327-2021, 2021
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We compared the dynamics of streamflow, groundwater and soil moisture to investigate how different parts of an agricultural catchment in Lower Austria are connected. Groundwater is best connected around the stream and worse uphill, where groundwater is deeper. Soil moisture connectivity increases with increasing catchment wetness but is not influenced by spatial position in the catchment. Groundwater is more connected to the stream on the seasonal scale compared to the event scale.
William Rust, Mark Cuthbert, John Bloomfield, Ron Corstanje, Nicholas Howden, and Ian Holman
Hydrol. Earth Syst. Sci., 25, 2223–2237, https://doi.org/10.5194/hess-25-2223-2021, https://doi.org/10.5194/hess-25-2223-2021, 2021
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In this paper, we find evidence for the cyclical behaviour (on a 7-year basis) in UK streamflow records that match the main cycle of the North Atlantic Oscillation. Furthermore, we find that the strength of these 7-year cycles in streamflow is dependent on proportional contributions from groundwater and the response times of the underlying groundwater systems. This may allow for improvements to water management practices through better understanding of long-term streamflow behaviour.
Elnaz Azmi, Uwe Ehret, Steven V. Weijs, Benjamin L. Ruddell, and Rui A. P. Perdigão
Hydrol. Earth Syst. Sci., 25, 1103–1115, https://doi.org/10.5194/hess-25-1103-2021, https://doi.org/10.5194/hess-25-1103-2021, 2021
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Computer models should be as simple as possible but not simpler. Simplicity refers to the length of the model and the effort it takes the model to generate its output. Here we present a practical technique for measuring the latter by the number of memory visits during model execution by
Strace, a troubleshooting and monitoring program. The advantage of this approach is that it can be applied to any computer-based model, which facilitates model intercomparison.
Sheena A. Spencer, Axel E. Anderson, Uldis Silins, and Adrian L. Collins
Hydrol. Earth Syst. Sci., 25, 237–255, https://doi.org/10.5194/hess-25-237-2021, https://doi.org/10.5194/hess-25-237-2021, 2021
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We used unique chemical signatures of precipitation, hillslope soil water, and groundwater sources of streamflow to explore seasonal variation in runoff generation in a snow-dominated mountain watershed underlain by glacial till and permeable bedrock. Reacted hillslope water reached the stream first at the onset of snowmelt, followed by a dilution effect by snowmelt from May to June. Groundwater and riparian water were important sources later in the summer. Till created complex subsurface flow.
Tian Lan, Kairong Lin, Chong-Yu Xu, Zhiyong Liu, and Huayang Cai
Hydrol. Earth Syst. Sci., 24, 5859–5874, https://doi.org/10.5194/hess-24-5859-2020, https://doi.org/10.5194/hess-24-5859-2020, 2020
Dan Rosbjerg
Hydrol. Earth Syst. Sci., 24, 4575–4585, https://doi.org/10.5194/hess-24-4575-2020, https://doi.org/10.5194/hess-24-4575-2020, 2020
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August Colding contributed the first law of thermodynamics, evaporation from water and grass, steady free surfaces in conduits, the cross-sectional velocity distribution in conduits, a complete theory for the Gulf Stream, air speed in cyclones, the piezometric surface in confined aquifers, the unconfined elliptic water table in soil between drain pipes, and the wind-induced set-up in the sea during storms.
Zhengke Pan, Pan Liu, Chong-Yu Xu, Lei Cheng, Jing Tian, Shujie Cheng, and Kang Xie
Hydrol. Earth Syst. Sci., 24, 4369–4387, https://doi.org/10.5194/hess-24-4369-2020, https://doi.org/10.5194/hess-24-4369-2020, 2020
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This study aims to identify the response of catchment water storage capacity (CWSC) to meteorological drought by examining the changes of hydrological-model parameters after drought events. This study improves our understanding of possible changes in the CWSC induced by a prolonged meteorological drought, which will help improve our ability to simulate the hydrological system under climate change.
Zong-Jie Li, Zong-Xing Li, Ling-Ling Song, Juan Gui, Jian Xue, Bai Juan Zhang, and Wen De Gao
Hydrol. Earth Syst. Sci., 24, 4169–4187, https://doi.org/10.5194/hess-24-4169-2020, https://doi.org/10.5194/hess-24-4169-2020, 2020
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This study mainly explores the hydraulic relations, recharge–drainage relations and their transformation paths, and the processes of each water body. It determines the composition of runoff, quantifies the contribution of each runoff component to different types of tributaries, and analyzes the hydrological effects of the temporal and spatial variation in runoff components. More importantly, we discuss the hydrological significance of permafrost and hydrological processes.
Michal Jenicek and Ondrej Ledvinka
Hydrol. Earth Syst. Sci., 24, 3475–3491, https://doi.org/10.5194/hess-24-3475-2020, https://doi.org/10.5194/hess-24-3475-2020, 2020
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Changes in snow affect the runoff seasonality, including summer low flows. Here we analyse this effect in 59 mountain catchments in Czechia. We show that snow is more effective in generating runoff compared to rain. Snow-poor years generated lower groundwater recharge than snow-rich years, which resulted in higher deficit volumes in summer. The lower recharge and runoff in the case of a snowfall-to-rain transition due to air temperature increase might be critical for water supply in the future.
Julia L. A. Knapp, Jana von Freyberg, Bjørn Studer, Leonie Kiewiet, and James W. Kirchner
Hydrol. Earth Syst. Sci., 24, 2561–2576, https://doi.org/10.5194/hess-24-2561-2020, https://doi.org/10.5194/hess-24-2561-2020, 2020
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Changes of stream water chemistry in response to discharge changes provide important insights into the storage and release of water from the catchment. Here we investigate the variability in concentration–discharge relationships among different solutes and hydrologic events and relate it to catchment conditions and dominant water sources.
Elizabeth R. Jachens, David E. Rupp, Clément Roques, and John S. Selker
Hydrol. Earth Syst. Sci., 24, 1159–1170, https://doi.org/10.5194/hess-24-1159-2020, https://doi.org/10.5194/hess-24-1159-2020, 2020
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Recession analysis uses the receding streamflow following precipitation events to estimate watershed-average properties. Two methods for recession analysis use recession events individually or all events collectively. Using synthetic case studies, this paper shows that analyzing recessions collectively produces flawed interpretations. Moving forward, recession analysis using individual recessions should be used to describe the average and variability of watershed behavior.
Lu Lin, Man Gao, Jintao Liu, Jiarong Wang, Shuhong Wang, Xi Chen, and Hu Liu
Hydrol. Earth Syst. Sci., 24, 1145–1157, https://doi.org/10.5194/hess-24-1145-2020, https://doi.org/10.5194/hess-24-1145-2020, 2020
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In this paper, recession flow analysis – assuming nonlinearized outflow from aquifers into streams – was used to quantify active groundwater storage in a headwater catchment with high glacierization and large-scale frozen ground on the Tibetan Plateau. Hence, this work provides a perspective to clarify the impact of glacial retreat and frozen ground degradation due to climate change on hydrological processes.
Francesc Gallart, Jana von Freyberg, María Valiente, James W. Kirchner, Pilar Llorens, and Jérôme Latron
Hydrol. Earth Syst. Sci., 24, 1101–1107, https://doi.org/10.5194/hess-24-1101-2020, https://doi.org/10.5194/hess-24-1101-2020, 2020
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How catchments store and release rain or melting water is still not well known. Now, it is broadly accepted that most of the water in streams is older than several months, and a relevant part may be many years old. But the age of water depends on the stream regime, being usually younger during high flows. This paper tries to provide tools for better analysing how the age of waters varies with flow in a catchment and for comparing the behaviour of catchments diverging in climate, size and regime.
Sebastian J. Gnann, Nicholas J. K. Howden, and Ross A. Woods
Hydrol. Earth Syst. Sci., 24, 561–580, https://doi.org/10.5194/hess-24-561-2020, https://doi.org/10.5194/hess-24-561-2020, 2020
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In many places, seasonal variability in precipitation and evapotranspiration (climate) leads to seasonal variability in river flow (streamflow). In this work, we explore how climate seasonality is transformed into streamflow seasonality and what controls this transformation (e.g. climate aridity and geology). The results might be used in grouping catchments, predicting the seasonal streamflow regime in ungauged catchments, and building hydrological simulation models.
Adam S. Ward, Steven M. Wondzell, Noah M. Schmadel, Skuyler Herzog, Jay P. Zarnetske, Viktor Baranov, Phillip J. Blaen, Nicolai Brekenfeld, Rosalie Chu, Romain Derelle, Jennifer Drummond, Jan H. Fleckenstein, Vanessa Garayburu-Caruso, Emily Graham, David Hannah, Ciaran J. Harman, Jase Hixson, Julia L. A. Knapp, Stefan Krause, Marie J. Kurz, Jörg Lewandowski, Angang Li, Eugènia Martí, Melinda Miller, Alexander M. Milner, Kerry Neil, Luisa Orsini, Aaron I. Packman, Stephen Plont, Lupita Renteria, Kevin Roche, Todd Royer, Catalina Segura, James Stegen, Jason Toyoda, Jacqueline Hager, and Nathan I. Wisnoski
Hydrol. Earth Syst. Sci., 23, 5199–5225, https://doi.org/10.5194/hess-23-5199-2019, https://doi.org/10.5194/hess-23-5199-2019, 2019
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The movement of water and solutes between streams and their shallow, connected subsurface is important to many ecosystem functions. These exchanges are widely expected to vary with stream flow across space and time, but these assumptions are seldom tested across basin scales. We completed more than 60 experiments across a 5th-order river basin to document these changes, finding patterns in space but not time. We conclude space-for-time and time-for-space substitutions are not good assumptions.
Lucy J. Barker, Jamie Hannaford, Simon Parry, Katie A. Smith, Maliko Tanguy, and Christel Prudhomme
Hydrol. Earth Syst. Sci., 23, 4583–4602, https://doi.org/10.5194/hess-23-4583-2019, https://doi.org/10.5194/hess-23-4583-2019, 2019
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It is important to understand historic droughts in order to plan and prepare for possible future events. In this study we use the standardised streamflow index for 1891–2015 to systematically identify, characterise and rank hydrological drought events for 108 near-natural UK catchments. Results show when and where the most severe events occurred and describe events of the early 20th century, providing catchment-scale detail important for both science and planning applications of the future.
Ralf Loritz, Axel Kleidon, Conrad Jackisch, Martijn Westhoff, Uwe Ehret, Hoshin Gupta, and Erwin Zehe
Hydrol. Earth Syst. Sci., 23, 3807–3821, https://doi.org/10.5194/hess-23-3807-2019, https://doi.org/10.5194/hess-23-3807-2019, 2019
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In this study, we develop a topographic index explaining hydrological similarity within a energy-centered framework, with the observation that the majority of potential energy is dissipated when rainfall becomes runoff.
Sophie Ehrhardt, Rohini Kumar, Jan H. Fleckenstein, Sabine Attinger, and Andreas Musolff
Hydrol. Earth Syst. Sci., 23, 3503–3524, https://doi.org/10.5194/hess-23-3503-2019, https://doi.org/10.5194/hess-23-3503-2019, 2019
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This study shows quantitative and temporal offsets between nitrogen input and riverine output, using time series of three nested catchments in central Germany. The riverine concentrations show lagged reactions to the input, but at the same time exhibit strong inter-annual changes in the relationship between riverine discharge and concentration. The study found a strong retention of nitrogen that is dominantly assigned to a hydrological N legacy, which will affect future stream concentrations.
Davide Zoccatelli, Francesco Marra, Moshe Armon, Yair Rinat, James A. Smith, and Efrat Morin
Hydrol. Earth Syst. Sci., 23, 2665–2678, https://doi.org/10.5194/hess-23-2665-2019, https://doi.org/10.5194/hess-23-2665-2019, 2019
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This study presents a comparison of flood properties over multiple Mediterranean and desert catchments. While in Mediterranean areas floods are related to rainfall amount, in deserts we observed a strong connection with the characteristics of the more intense part of storms. Because of the different mechanisms involved, despite having significantly shorter and more localized storms, deserts are able to produce floods with a magnitude comparable to Mediterranean areas.
Martina Botter, Paolo Burlando, and Simone Fatichi
Hydrol. Earth Syst. Sci., 23, 1885–1904, https://doi.org/10.5194/hess-23-1885-2019, https://doi.org/10.5194/hess-23-1885-2019, 2019
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The study focuses on the solute export from rivers with the purpose of discerning the impacts of anthropic activities and catchment characteristics on water quality. The results revealed a more detectable impact of the anthropic activities than of the catchment characteristics. The solute export follows different dynamics depending on catchment characteristics and mainly on solute-specific properties. The export modality is consistent across different catchments only for a minority of solutes.
Anne F. Van Loon, Sally Rangecroft, Gemma Coxon, José Agustín Breña Naranjo, Floris Van Ogtrop, and Henny A. J. Van Lanen
Hydrol. Earth Syst. Sci., 23, 1725–1739, https://doi.org/10.5194/hess-23-1725-2019, https://doi.org/10.5194/hess-23-1725-2019, 2019
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We explore the use of the classic
paired-catchmentapproach to quantify human influence on hydrological droughts. In this approach two similar catchments are compared and differences are attributed to the human activity present in one. In two case studies in UK and Australia, we found that groundwater abstraction aggravated streamflow drought by > 200 % and water transfer alleviated droughts with 25–80 %. Understanding the human influence on droughts can support water management decisions.
Karl Auerswald, Peter Moyle, Simon Paul Seibert, and Juergen Geist
Hydrol. Earth Syst. Sci., 23, 1035–1044, https://doi.org/10.5194/hess-23-1035-2019, https://doi.org/10.5194/hess-23-1035-2019, 2019
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The demand for flood protection often results in the construction of more and bigger levees along rivers. We highlight that such technical solutions often result in undesired socio-economic and ecological consequences such as increased downstream flooding risk, changes of groundwater levels, and a loss of aquatic and terrestrial biodiversity. We propose a transdisciplinary approach of integrated flood management and green infrastructure instead of reliance on technical protection measures.
Elena Diamantini, Stefano Mallucci, and Alberto Bellin
Hydrol. Earth Syst. Sci., 23, 573–593, https://doi.org/10.5194/hess-23-573-2019, https://doi.org/10.5194/hess-23-573-2019, 2019
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The description of pharmaceutical fate and transport introduced into a watershed is a challenging topic, especially because of the possible adverse effects on human health. In addition, an accurate estimation of solute sources and routes is still missing. This study uses a new promising modeling approach to predict pharmaceutical concentrations in rivers. Results show an interesting relationship between solute concentrations in waters and touristic fluxes.
Sheng Ye, Qihua Ran, Xudong Fu, Chunhong Hu, Guangqian Wang, Gary Parker, Xiuxiu Chen, and Siwei Zhang
Hydrol. Earth Syst. Sci., 23, 549–556, https://doi.org/10.5194/hess-23-549-2019, https://doi.org/10.5194/hess-23-549-2019, 2019
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Our study shows that there is declining coupling between sediment concentration and discharge from daily to annual scales for gauges across the Yellow River basin (YRB). Not only the coupling, but also the magnitude of sediment response to discharge variation decreases with long-term mean discharge. This emergent stationarity can be related to sediment retardation by vegetation, suggesting the shift of dominance from water to vegetation as mean annual discharge increases.
Dingbao Wang
Hydrol. Earth Syst. Sci., 22, 6567–6578, https://doi.org/10.5194/hess-22-6567-2018, https://doi.org/10.5194/hess-22-6567-2018, 2018
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A novel distribution function is proposed for describing the spatial distribution of soil water storage capacity, and then the classical and empirical hydrologic model (the SCS curve number method) is derived as when the initial soil water storage is zero. This distribution function unifies the SCS curve number method and probability-distributed models such as the VIC and Xinanjiang models. The unified model provides a better way for modeling surface runoff.
Magdalena Uber, Jean-Pierre Vandervaere, Isabella Zin, Isabelle Braud, Maik Heistermann, Cédric Legoût, Gilles Molinié, and Guillaume Nord
Hydrol. Earth Syst. Sci., 22, 6127–6146, https://doi.org/10.5194/hess-22-6127-2018, https://doi.org/10.5194/hess-22-6127-2018, 2018
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We investigate how rivers in a flash-flood-prone region in southern France respond to rainfall depending on initial soil moisture. Therefore, high-resolution data of rainfall, river discharge and soil moisture were used. We find that during dry initial conditions, the rivers hardly respond even for heavy rain events, but for wet initial conditions, the response remains unpredictable: for some rain events almost all rainfall is transformed to discharge, whereas this is not the case for others.
Jana von Freyberg, Bjørn Studer, Michael Rinderer, and James W. Kirchner
Hydrol. Earth Syst. Sci., 22, 5847–5865, https://doi.org/10.5194/hess-22-5847-2018, https://doi.org/10.5194/hess-22-5847-2018, 2018
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We show event- and pre-event-water volumes as fractions of precipitation, rather than discharge, to provide an alternative and more insightful approach to study catchment hydrological processes. For this, we analyze 24 storm events using high-frequency measurements of stable water isotopes in stream water and precipitation at a pre-Alpine catchment. Antecedent wetness and storm characteristics are dominant controls on event-water discharge and pre-event-water mobilization from storage.
Tjitske J. Geertsema, Adriaan J. Teuling, Remko Uijlenhoet, Paul J. J. F. Torfs, and Antonius J. F. Hoitink
Hydrol. Earth Syst. Sci., 22, 5599–5613, https://doi.org/10.5194/hess-22-5599-2018, https://doi.org/10.5194/hess-22-5599-2018, 2018
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This study investigate the processes and effects of simultaneous flood peaks at a lowland confluence. The flood peaks are analyzed with the relatively new dynamic time warping method, which offers a robust means of tracing flood waves in discharge time series at confluences. The time lag between discharge peaks in the main river and its lowland tributaries is small compared to the wave duration; therefore the exact timing of discharge peaks may be little relevant to flood risk.
Vijay P. Santikari and Lawrence C. Murdoch
Hydrol. Earth Syst. Sci., 22, 4725–4743, https://doi.org/10.5194/hess-22-4725-2018, https://doi.org/10.5194/hess-22-4725-2018, 2018
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The curve number (CN) method is the most widely used approach for estimating runoff from rainfall. Despite its popularity, there is a conceptual flaw where CN varies with rainfall although it is assumed to be constant. In this paper, we describe theoretical analyses that show how this behavior is due to watershed heterogeneity, and we then provide simple modifications to the method to improve its runoff predictions. The findings will benefit hydrologists and watershed models that use CN method.
Cited articles
Arce, M. I., Mendoza-Lera, C., Almagro, M., Catalán, N., Romaní, A.
M., Martí, E., Gómez, R., Bernal, S., Foulquier, A., Mutz, M.,
Marcé, R., Zoppini, A., Gionchetta, G., Weigelhofer, G., del Campo, R.,
Robinson, C. T., Gilmer, A., Rulik, M., Obrador, B., Shumilova, O.,
Zlatanović, S., Arnon, S., Baldrian, P., Singer, G., Datry, T.,
Skoulikidis, N., Tietjen, B., and von Schiller, D.: A conceptual framework
for understanding the biogeochemistry of dry riverbeds through the lens of
soil science, Earth-Sci. Rev., 188, 441–453,
https://doi.org/10.1016/j.earscirev.2018.12.001, 2019.
Àvila, A., Piñol, J., Rodà, F., and Neal, C.: Storm solute
behavior in a montane Mediterranean forested catchment, J. Hydrol., 140,
143–161, https://doi.org/10.1016/0022-1694(92)90238-q, 1992.
Bastias, E., Ribot, M., Bernal, S., Sabater, F., and Martí, E.:
Microbial uptake of nitrogen and carbon from the water column by
litter-associated microbes differs among litter species, Limnol. Oceanogr.,
65, 1891–1902, https://doi.org/10.1002/lno.11425, 2020.
Beiter, D., Weiler, M., and Blume, T.: Characterising hillslope–stream connectivity with a joint event analysis of stream and groundwater levels, Hydrol. Earth Syst. Sci., 24, 5713–5744, https://doi.org/10.5194/hess-24-5713-2020, 2020.
Bernal, S., Butturini, A., and Sabater, F.: Variability of DOC and nitrate responses to storms in a small Mediterranean forested catchment, Hydrol. Earth Syst. Sci., 6, 1031–1041, https://doi.org/10.5194/hess-6-1031-2002, 2002.
Bernal, S., Butturini, A., and Sabater, F.: Seasonal variations of dissolved
nitrogen and DOC:DON ratios in an intermittent Mediterranean stream,
Biogeochemistry, 75, 351–372, https://doi.org/10.1007/s10533-005-1246-7,
2005.
Bernal, S., Lupon, A., Ribot, M., Sabater, F., and Martí, E.: Riparian and in-stream controls on nutrient concentrations and fluxes in a headwater forested stream, Biogeosciences, 12, 1941–1954, https://doi.org/10.5194/bg-12-1941-2015, 2015.
Bernal, S., Lupon, A., Catalán, N., Castelar, S., and Martí, E.: Decoupling of dissolved organic matter patterns between stream and riparian groundwater in a headwater forested catchment, Hydrol. Earth Syst. Sci., 22, 1897–1910, https://doi.org/10.5194/hess-22-1897-2018, 2018.
Bernal, S., Lupon, A., Wollheim, W. M., Sabater, F., Poblador, S., and
Martí, E.: Supply, Demand, and In-Stream Retention of Dissolved Organic
Carbon and Nitrate During Storms in Mediterranean Forested Headwater
Streams, Front. Environ. Sci., 7, 60,
https://doi.org/10.3389/fenvs.2019.00060, 2019.
Bernhardt, E. S., Heffernan, J. B., Grimm, N. B., Stanley, E. H., Harvey, J.
W., Arroita, M., Appling, A. P., Cohen, M. J., McDowell, W. H., Hall, R. O.,
Read, J. S., Roberts, B. J., Stets, E. G., and Yackulic, C. B.: The
metabolic regimes of flowing waters, Limnol. Oceanogr., 63, S99–S118,
https://doi.org/10.1002/lno.10726, 2018.
Blackburn, M., Ledesma, J. L. J., Näsholm, T., Laudon, H., and
Sponseller, R. A.: Evaluating hillslope and riparian contributions to
dissolved nitrogen (N) export from a boreal forest catchment, J. Geophys.
Res.-Biogeo., 122, 324–339, https://doi.org/10.1002/2016jg003535, 2017.
Blaurock, K., Beudert, B., Gilfedder, B. S., Fleckenstein, J. H., Peiffer, S., and Hopp, L.: Low hydrological connectivity after summer drought inhibits DOC export in a forested headwater catchment, Hydrol. Earth Syst. Sci., 25, 5133–5151, https://doi.org/10.5194/hess-25-5133-2021, 2021.
Boy, J., Valarezo, C., and Wilcke, W.: Water flow paths in soil control
element exports in an Andean tropical montane forest, Eur. J. Soil Sci., 59,
1209–1227, https://doi.org/10.1111/j.1365-2389.2008.01063.x, 2008.
Brookshire, E. N. J., Valett, H. M., Thomas, S. A., and Webster, J. R.:
Coupled cycling of dissolved organic nitrogen and carbon in a forest stream,
Ecology, 86, 2487–2496, https://doi.org/10.1890/04-1184, 2005.
Buffam, I., Galloway, J. N., Blum, L. K., and McGlathery, K. J.: A
stormflow/baseflow comparison of dissolved organic matter concentrations and
bioavailability in an Appalachian stream, Biogeochemistry, 53, 269–306,
https://doi.org/10.1023/a:1010643432253, 2001.
Butturini, A., Bernal, S., Nin, E., Hellin, C., Rivero, L., Sabater, S., and
Sabater, F.: Influences of the stream groundwater hydrology on nitrate
concentration in unsaturated riparian area bounded by an intermittent
Mediterranean stream, Water Resour. Res., 39, 1110,
https://doi.org/10.1029/2001wr001260, 2003.
Caillon, F. and Schelker, J.: Dynamic transfer of soil bacteria and
dissolved organic carbon into small streams during hydrological events,
Aquat. Sci., 82, 41, https://doi.org/10.1007/s00027-020-0714-4, 2020.
Camino-Serrano, M., Graf Pannatier, E., Vicca, S., Luyssaert, S., Jonard, M., Ciais, P., Guenet, B., Gielen, B., Peñuelas, J., Sardans, J., Waldner, P., Etzold, S., Cecchini, G., Clarke, N., Galić, Z., Gandois, L., Hansen, K., Johnson, J., Klinck, U., Lachmanová, Z., Lindroos, A.-J., Meesenburg, H., Nieminen, T. M., Sanders, T. G. M., Sawicka, K., Seidling, W., Thimonier, A., Vanguelova, E., Verstraeten, A., Vesterdal, L., and Janssens, I. A.: Trends in soil solution dissolved organic carbon (DOC) concentrations across European forests, Biogeosciences, 13, 5567–5585, https://doi.org/10.5194/bg-13-5567-2016, 2016.
Casas-Ruiz, J. P., Catalán, N., Gómez-Gener, L., von Schiller, D.,
Obrador, B., Kothawala, D. N., López, P., Sabater, S., and Marcé,
R.: A tale of pipes and reactors: Controls on the in-stream dynamics of
dissolved organic matter in rivers, Limnol. Oceanogr., 62, S85–S94,
https://doi.org/10.1002/lno.10471, 2017.
Catalán, N., Casas-Ruiz, J. P., Arce, M. I., Abril, M., Bravo, A. G.,
del Campo, R., Estévez, E., Freixa, A., Giménez-Grau, P.,
González-Ferreras, A. M., Gómez-Gener, L., Lupon, A., Martínez,
A., Palacin-Lizarbe, C., Poblador, S., Rasines-Ladero, R., Reyes, M.,
Rodríguez-Castillo, T., Rodríguez-Lozano, P., Sanpera-Calbet, I.,
Tornero, I., and Pastor, A.: Behind the Scenes: Mechanisms Regulating
Climatic Patterns of Dissolved Organic Carbon Uptake in Headwater Streams,
Global Biogeochem. Cy., 32, 1528–1541, https://doi.org/10.1029/2018gb005919,
2018.
Cirmo, C. P. and McDonnell, J. J.: Linking the hydrologic and
biogeochemical controls of nitrogen transport in near-stream zones of
temperate-forested catchments: a review, J. Hydrol., 199, 88–120,
https://doi.org/10.1016/s0022-1694(96)03286-6, 1997.
Danger, M., Daufresne, T., Lucas, F., Pissard, S., and Lacroix, G.: Does
Liebig's law of the minimum scale up from species to communities?, Oikos,
117, 1741–1751, https://doi.org/10.1111/j.1600-0706.2008.16793.x, 2008.
de Wit, H. A., Valinia, S., Weyhenmeyer, G. A., Futter, M. N., Kortelainen,
P., Austnes, K., Hessen, D. O., Räike, A., Laudon, H., and Vuorenmaa,
J.: Current Browning of Surface Waters Will Be Further Promoted by Wetter
Climate, Environ. Sci. Tech. Lett., 3, 430–435,
https://doi.org/10.1021/acs.estlett.6b00396, 2016.
Doblas-Miranda, E., Rovira, P., Brotons, L., Martínez-Vilalta, J., Retana, J., Pla, M., and Vayreda, J.: Soil carbon stocks and their variability across the forests, shrublands and grasslands of peninsular Spain, Biogeosciences, 10, 8353–8361, https://doi.org/10.5194/bg-10-8353-2013, 2013.
Dodds, W. K., López, A. J., Bowden, W. B., Gregory, S., Grimm, N. B.,
Hamilton, S. K., Hershey, A. E., Martí, E., McDowell, W. H., Meyer, J.
L., Morrall, D., Mulholland, P. J., Peterson, B. J., Tank, J. L., Valett, H.
M., Webster, J. R., and Wollheim, W.: N uptake as a function of
concentration in streams, J. N. Am. Benthol. Soc., 21, 206–220,
https://doi.org/10.2307/1468410, 2002.
Dosskey, M. G. and Bertsch, P. M.: Forest sources and pathways of organic matter transport to a blackwater stream: a hydrologic approach, Biogeochemistry, 24, 1–19, https://doi.org/10.1007/BF00001304, 1994.
Dupas, R., Musolff, A., Jawitz, J. W., Rao, P. S. C., Jäger, C. G., Fleckenstein, J. H., Rode, M., and Borchardt, D.: Carbon and nutrient export regimes from headwater catchments to downstream reaches, Biogeosciences, 14, 4391–4407, https://doi.org/10.5194/bg-14-4391-2017, 2017.
Elser, J. J., Fagan, W. F., Denno, R. F., Dobberfuhl, D. R., Folarin, A., Huberty, A., Interlandi, S., Kilham, S. S., McCauley, E., Schulz, K. L., Siemann, E. H., and Sterner, R. W.: Nutritional constraints in terrestrial and freshwater food webs, Nature, 408, 578–580, https://doi.org/10.1038/35046058, 2000.
Eriksson, L., Johansson, E., and Wold, S.: Introduction to Multi- and
Megavariate Data Analysis Using Projection Methods (PCA & PLS), Umetrics,
1999.
Fasching, C., Akotoye, C., Bižić, M., Fonvielle, J., Ionescu, D.,
Mathavarajah, S., Zoccarato, L., Walsh, D. A., Grossart, H. P., and
Xenopoulos, M. A.: Linking stream microbial community functional genes to
dissolved organic matter and inorganic nutrients, Limnol. Oceanogr., 65,
S71–S87, https://doi.org/10.1002/lno.11356, 2020.
Fovet, O., Ruiz, L., Hrachowitz, M., Faucheux, M., and Gascuel-Odoux, C.: Hydrological hysteresis and its value for assessing process consistency in catchment conceptual models, Hydrol. Earth Syst. Sci., 19, 105–123, https://doi.org/10.5194/hess-19-105-2015, 2015.
Fovet, O., Humbert, G., Dupas, R., Gascuel-Odoux, C., Gruau, G., Jaffrezic,
A., Thelusma, G., Faucheux, M., Gilliet, N., Hamon, Y., and Grimaldi, C.:
Seasonal variability of stream water quality response to storm events
captured using high-frequency and multi-parameter data, J. Hydrol., 559,
282–293, https://doi.org/10.1016/j.jhydrol.2018.02.040, 2018.
Frei, S., Lischeid, G., and Fleckenstein, J. H.: Effects of micro-topography
on surface-subsurface exchange and runoff generation in a virtual riparian
wetland – A modeling study, Adv. Water Resour., 33, 1388–1401,
https://doi.org/10.1016/j.advwatres.2010.07.006, 2010.
Frei, S., Knorr, K. H., Peiffer, S., and Fleckenstein, J. H.: Surface
micro-topography causes hot spots of biogeochemical activity in wetland
systems: A virtual modeling experiment, J. Geophys. Res.-Biogeo., 117,
G00N12, https://doi.org/10.1029/2012jg002012, 2012.
Gallart, F., Llorens, P., Latron, J., and Regüés, D.: Hydrological processes and their seasonal controls in a small Mediterranean mountain catchment in the Pyrenees, Hydrol. Earth Syst. Sci., 6, 527–537, https://doi.org/10.5194/hess-6-527-2002, 2002.
Godsey, S. E., Kirchner, J. W., and Clow, D. W.: Concentration-discharge
relationships reflect chemostatic characteristics of US catchments, Hydrol.
Process., 23, 1844–1864, https://doi.org/10.1002/hyp.7315, 2009.
Gordon, N. D., McMahon, T. A., Finlayson, B. L., Gippel, C. J., and Nathan,
R. J.: Stream Hydrology: An Introduction for Ecologists, Wiley, 2004.
Hartmann, J., Lauerwald, R., and Moosdorf, N.: A brief overview of the
GLObal RIver CHemistry Database, GLORICH, Proced. Earth Plan. Sc., 10,
23–27, https://doi.org/10.1016/j.proeps.2014.08.005, 2014.
Helton, A. M., Ardón, M., and Bernhardt, E. S.: Thermodynamic
constraints on the utility of ecological stoichiometry for explaining global
biogeochemical patterns, Ecol. Lett., 18, 1049–1056,
https://doi.org/10.1111/ele.12487, 2015.
Hewlett, J. and Hibbert, A.: Factors affecting the response of small
watersheds to precipitation in humid areas, in: Forest Hydrology, edited by:
Sopper, W. and Lull, H., Pergamon Press, New York, 1967.
Hinton, M. J., Schiff, S. L., and English, M. C.: The significance of storms
for the concentration and export of dissolved organic carbon from two
Precambrian Shield catchments, Biogeochemistry, 36, 67–88,
https://doi.org/10.1023/a:1005779711821, 1997.
Inamdar, S. P. and Mitchell, M. J.: Hydrologic and topographic controls on
storm-event exports of dissolved organic carbon (DOC) and nitrate across
catchment scales, Water Resour. Res., 42, W03421,
https://doi.org/10.1029/2005wr004212, 2006.
Jencso, K. G., McGlynn, B. L., Gooseff, M. N., Wondzell, S. M., Bencala, K.
E., and Marshall, L. A.: Hydrologic connectivity between landscapes and
streams: Transferring reach-and plot-scale understanding to the catchment
scale, Water Resour. Res., 45, W04428, https://doi.org/10.1029/2008wr007225, 2009.
Jung, M., Burt, T. P., and Bates, P. D.: Toward a conceptual model of
floodplain water table response, Water Resour. Res., 40, W12409,
https://doi.org/10.1029/2003wr002619, 2004.
Kendall, K. A., Shanley, J. B., and McDonnell, J. J.: A hydrometric and
geochemical approach to test the transmissivity feedback hypothesis during
snowmelt, J. Hydrol., 219, 188–205,
https://doi.org/10.1016/s0022-1694(99)00059-1, 1999.
Köhler, S. J., Buffam, I., Seibert, J., Bishop, K. H., and Laudon, H.:
Dynamics of stream water TOC concentrations in a boreal headwater catchment:
Controlling factors and implications for climate scenarios, J. Hydrol., 373,
44–56, https://doi.org/10.1016/j.jhydrol.2009.04.012, 2009.
Ledesma, J. L. J.: Daily time series (2010–2012) of meteorological and
hydrological variables at the Font del Regàs catchment, Spain,
HydroShare [data set], https://doi.org/10.4211/hs.3366012c5e254937aa661ce2a93c3140,
2021.
Ledesma, J. L. J.: Daily time series (2010–2012) of stream DOC and NO
Ledesma, J. L. J., Futter, M. N., Blackburn, M., Lidman, F., Grabs, T.,
Sponseller, R. A., Laudon, H., Bishop, K. H., and Köhler, S. J.: Towards
an Improved Conceptualization of Riparian Zones in Boreal Forest Headwaters,
Ecosystems, 21, 297–315, https://doi.org/10.1007/s10021-017-0149-5, 2018.
Ledesma, J. L. J., Ruiz-Pérez, G., Lupon, A., Poblador, S., Futter, M.
N., Sabater, F., and Bernal, S.: Future changes in the Dominant Source Layer
of riparian lateral water fluxes in a subhumid Mediterranean catchment, J.
Hydrol., 595, 126014, https://doi.org/10.1016/j.jhydrol.2021.126014, 2021.
Li, A. G., Bernal, S., Kohler, B., Thomas, S. A., Martí, E., and
Packman, A. I.: Residence Time in Hyporheic Bioactive Layers Explains
Nitrate Uptake in Streams, Water Resour. Res., 57, e2020WR027646, https://doi.org/10.1029/2020wr027646,
2021.
Lupon, A., Gerber, S., Sabater, F., and Bernal, S.: Climate response of the
soil nitrogen cycle in three forest types of a headwater Mediterranean
catchment, J. Geophys. Res.-Biogeo., 120, 859–875,
https://doi.org/10.1002/2014jg002791, 2015.
Lupon, A., Sabater, F., Miñarro, A., and Bernal, S.: Contribution of
pulses of soil nitrogen mineralization and nitrification to soil nitrogen
availability in three Mediterranean forests, Eur. J. Soil Sci., 67, 303–313,
https://doi.org/10.1111/ejss.12344, 2016a.
Lupon, A., Bernal, S., Poblador, S., Martí, E., and Sabater, F.: The influence of riparian evapotranspiration on stream hydrology and nitrogen retention in a subhumid Mediterranean catchment, Hydrol. Earth Syst. Sci., 20, 3831–3842, https://doi.org/10.5194/hess-20-3831-2016, 2016b.
Lupon, A., Martí, E., Sabater, F., and Bernal, S.: Green light: gross
primary production influences seasonal stream N export by controlling
fine-scale N dynamics, Ecology, 97, 133–144,
https://doi.org/10.1890/14-2296.1, 2016c.
Lupon, A., Denfeld, B. A., Laudon, H., Leach, J., and Sponseller, R. A.:
Discrete groundwater inflows influence patterns of nitrogen uptake in a
boreal headwater stream, Freshw. Sci., 39, 228–240,
https://doi.org/10.1086/708521, 2020a.
Lupon, A., Catalán, N., Martí, E., and Bernal, S.: Influence of
Dissolved Organic Matter Sources on In-Stream Net Dissolved Organic Carbon
Uptake in a Mediterranean Stream, Water, 12, 1722,
https://doi.org/10.3390/w12061722, 2020b.
Manzoni, S., Čapek, P., Mooshammer, M., Lindahl, B. D., Richter, A., and
Šantrůčková, H.: Optimal metabolic regulation along resource
stoichiometry gradients, Ecol. Lett., 20, 1182–1191,
https://doi.org/10.1111/ele.12815, 2017.
Marcé, R., von Schiller, D., Aguilera, R., Martí, E., and Bernal,
S.: Contribution of Hydrologic Opportunity and Biogeochemical Reactivity to
the Variability of Nutrient Retention in River Networks, Global Biogeochem.
Cy., 32, 376–388, https://doi.org/10.1002/2017gb005677, 2018.
McClain, M. E., Richey, J. E., and Pimentel, T. P.: Groundwater nitrogen
dynamics at the terrestrial-lotic interface of a small catchment in the
Central Amazon Basin, Biogeochemistry, 27, 113–127, https://doi.org/10.1007/BF00002814, 1994.
McDowell, W. H., Bowden, W. B., and Asbury, C. E.: Riparian nitrogen
dynamics in two geomorphologically distinct tropical rain-forest watersheds:
subsurface solute patterns, Biogeochemistry, 18, 53–75,
https://doi.org/10.1007/bf00002703, 1992.
Medici, C., Butturini, A., Bernal, S., Vázquez, E., Sabater, F.,
Vélez, J. I., and Francés, F.: Modelling the non-linear hydrological
behaviour of a small Mediterranean forested catchment, Hydrol. Process., 22,
3814–3828, https://doi.org/10.1002/hyp.6991, 2008.
Musolff, A., Selle, B., Büttner, O., Opitz, M., and Tittel, J.:
Unexpected release of phosphate and organic carbon to streams linked to
declining nitrogen depositions, Glob. Change Biol., 23, 1891–1901,
https://doi.org/10.1111/gcb.13498, 2017.
Musolff, A., Fleckenstein, J. H., Opitz, M., Büttner, O., Kumar, R., and
Tittel, J.: Spatio-temporal controls of dissolved organic carbon stream
water concentrations, J. Hydrol., 566, 205–215,
https://doi.org/10.1016/j.jhydrol.2018.09.011, 2018.
Pastor, A., Compson, Z. G., Dijkstra, P., Riera, J. L., Martí, E.,
Sabater, F., Hungate, B. A., and Marks, J. C.: Stream carbon and nitrogen
supplements during leaf litter decomposition: contrasting patterns for two
foundation species, Oecologia, 176, 1111–1121,
https://doi.org/10.1007/s00442-014-3063-y, 2014.
Peterson, B. J., Wollheim, W. M., Mulholland, P. J., Webster, J. R., Meyer,
J. L., Tank, J. L., Marti, E., Bowden, W. B., Valett, H. M., Hershey, A. E.,
McDowell, W. H., Dodds, W. K., Hamilton, S. K., Gregory, S., and Morrall, D.
D.: Control of nitrogen export from watersheds by headwater streams,
Science, 292, 86–90, https://doi.org/10.1126/science.1056874, 2001.
Poblador, S., Thomas, Z., Rousseau-Gueutin, P., Sabaté, S., and Sabater,
F.: Riparian forest transpiration under the current and projected
Mediterranean climate: Effects on soil water and nitrate uptake,
Ecohydrology, 12, e2043, https://doi.org/10.1002/eco.2043, 2019.
Ranalli, A. J. and Macalady, D. L.: The importance of the riparian zone and
in-stream processes in nitrate attenuation in undisturbed and agricultural
watersheds – A review of the scientific literature, J. Hydrol., 389,
406–415, https://doi.org/10.1016/j.jhydrol.2010.05.045, 2010.
Raymond, P. A., Saiers, J. E., and Sobczak, W. V.: Hydrological and
biogeochemical controls on watershed dissolved organic matter transport:
pulse-shunt concept, Ecology, 97, 5–16, https://doi.org/10.1890/14-1684.1,
2016.
Rodhe, A.: On the generation of stream runoff in till soils, Nord. Hydrol.,
20, 1–8, https://doi.org/10.2166/nh.1989.0001, 1989.
Schiff, S. L., Devito, K. J., Elgood, R. J., McCrindle, P. M., Spoelstra,
J., and Dillon, P.: Two adjacent forested catchments: Dramatically different
NO
Seybold, E. and McGlynn, B.: Hydrologic and biogeochemical drivers of
dissolved organic carbon and nitrate uptake in a headwater stream network,
Biogeochemistry, 138, 23–48, https://doi.org/10.1007/s10533-018-0426-1,
2018.
Simon, J., Bilela, S., and Rennenberg, H.: Nitrogen uptake capacity of
European beech (Fagus sylvatica L.) only partially depends on tree age,
Trees-Struct. Funct., 35, 1739–1745, https://doi.org/10.1007/s00468-021-02190-z, 2021.
Spinoni, J., Vogt, J. V., Naumann, G., Barbosa, P., and Dosio, A.: Will
drought events become more frequent and severe in Europe?, Int. J.
Climatol., 38, 1718–1736, https://doi.org/10.1002/joc.5291, 2018.
Sterner, R. W. and Elser, J. J.: Ecological Stoichiometry: The Biology of
Elements from Molecules to the Biosphere, Princeton University Press, https://doi.org/10.1515/9781400885695, 2003.
Strohmeier, S., Knorr, K.-H., Reichert, M., Frei, S., Fleckenstein, J. H., Peiffer, S., and Matzner, E.: Concentrations and fluxes of dissolved organic carbon in runoff from a forested catchment: insights from high frequency measurements, Biogeosciences, 10, 905–916, https://doi.org/10.5194/bg-10-905-2013, 2013.
Tank, J. L., Martí, E., Riis, T., von Schiller, D., Reisinger, A. J.,
Dodds, W. K., Whiles, M. R., Ashkenas, L. R., Bowden, W. B., Collins, S. M.,
Crenshaw, C. L., Crowl, T. A., Griffiths, N. A., Grimm, N. B., Hamilton, S.
K., Johnson, S. L., McDowell, W. H., Norman, B. M., Rosi, E. J., Simon, K.
S., Thomas, S. A., and Webster, J. R.: Partitioning assimilatory nitrogen
uptake in streams: an analysis of stable isotope tracer additions across
continents, Ecol. Monogr., 88, 120–138, https://doi.org/10.1002/ecm.1280,
2018.
Taylor, P. G. and Townsend, A. R.: Stoichiometric control of organic
carbon-nitrate relationships from soils to the sea, Nature, 464, 1178–1181,
https://doi.org/10.1038/nature08985, 2010.
Tunaley, C., Tetzlaff, D., Lessels, J., and Soulsby, C.: Linking
high-frequency DOC dynamics to the age of connected water sources, Water
Resour. Res., 52, 5232–5247, https://doi.org/10.1002/2015wr018419, 2016.
Wagner, S., Fair, J. H., Matt, S., Hosen, J. D., Raymond, P., Saiers, J.,
Shanley, J. B., Dittmar, T., and Stubbins, A.: Molecular Hysteresis:
Hydrologically Driven Changes in Riverine Dissolved Organic Matter Chemistry
During a Storm Event, J. Geophys. Res.-Biogeo., 124, 759–774,
https://doi.org/10.1029/2018jg004817, 2019.
Wen, H., Perdrial, J., Abbott, B. W., Bernal, S., Dupas, R., Godsey, S. E., Harpold, A., Rizzo, D., Underwood, K., Adler, T., Sterle, G., and Li, L.: Temperature controls production but hydrology regulates export of dissolved organic carbon at the catchment scale, Hydrol. Earth Syst. Sci., 24, 945–966, https://doi.org/10.5194/hess-24-945-2020, 2020.
Werner, B. J., Musolff, A., Lechtenfeld, O. J., de Rooij, G. H., Oosterwoud, M. R., and Fleckenstein, J. H.: High-frequency measurements explain quantity and quality of dissolved organic carbon mobilization in a headwater catchment, Biogeosciences, 16, 4497–4516, https://doi.org/10.5194/bg-16-4497-2019, 2019.
Wilson, H. F., Saiers, J. E., Raymond, P. A., and Sobczak, W. V.: Hydrologic
Drivers and Seasonality of Dissolved Organic Carbon Concentration, Nitrogen
Content, Bioavailability, and Export in a Forested New England Stream,
Ecosystems, 16, 604–616, https://doi.org/10.1007/s10021-013-9635-6, 2013.
Wold, S., Sjöström, M., and Eriksson, L.: PLS-regression: a basic
tool of chemometrics, Chemometrics Intell. Lab. Syst., 58, 109–130,
https://doi.org/10.1016/s0169-7439(01)00155-1, 2001.
Wollheim, W. M., Bernal, S., Burns, D. A., Czuba, J. A., Driscoll, C. T., Hansen, A. T., Hensley, R. T., Hosen, J. D., Inamdar, S., Kaushal, S. S., Koenig, L. E., Lu, Y. H., Marzadri, A., Raymond, P. A., Scott, D., Stewart, R. J., Vidon, P. G., and Wohl, E.: River network saturation concept: factors influencing the balance of biogeochemical supply and demand of river networks, Biogeochemistry, 141, 503–521, https://doi.org/10.1007/s10533-018-0488-0, 2018.
Yang, L., Hur, J., Lee, S., Chang, S. W., and Shin, H. S.: Dynamics of
dissolved organic matter during four storm events in two forest streams:
source, export, and implications for harmful disinfection byproduct
formation, Environ. Sci. Pollut. Res., 22, 9173–9183, https://doi.org/10.1007/s11356-015-4078-6, 2015.
Zar, J. H.: Biostatistical Analysis, Prentice Hall, Upper Saddle River, NJ,
2010.
Zimmer, M. A. and McGlynn, B. L.: Lateral, Vertical, and Longitudinal
Source Area Connectivity Drive Runoff and Carbon Export Across Watershed
Scales, Water Resour. Res., 54, 1576–1598,
https://doi.org/10.1002/2017wr021718, 2018.
Short summary
We studied a small stream located in a Mediterranean forest. Our goal was to understand how stream flow and the presence of riparian forests, which grow in flat banks near the stream, influence the availability of food for aquatic microorganisms. High flows were associated with higher amounts of food because rainfall episodes transfer it from the surrounding sources, particularly riparian forests, to the stream. Understanding how ecosystems work is essential to better manage natural resources.
We studied a small stream located in a Mediterranean forest. Our goal was to understand how...
