Articles | Volume 16, issue 8
https://doi.org/10.5194/hess-16-2973-2012
© Author(s) 2012. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/hess-16-2973-2012
© Author(s) 2012. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
Research article
| 
24 Aug 2012
Research article |
| 24 Aug 2012
Fluorescent particle tracers in surface hydrology: a proof of concept in a semi-natural hillslope
F. Tauro
Department of Mechanical and Aerospace Engineering, Polytechnic Institute of New York University, Brooklyn, NY 11201, USA
Dipartimento di Ingegneria Civile, Edile e Ambientale, Sapienza University of Rome, Rome 00184, Italy
Honors Center of Italian Universities, Sapienza University of Rome, Rome 00184, Italy
S. Grimaldi
Department of Mechanical and Aerospace Engineering, Polytechnic Institute of New York University, Brooklyn, NY 11201, USA
Honors Center of Italian Universities, Sapienza University of Rome, Rome 00184, Italy
Dipartimento per l'Innovazione nei Sistemi Biologici, Agroalimentari e Forestali, University of Tuscia, Viterbo 01100, Italy
A. Petroselli
Dipartimento di Scienze e Tecnologie per l'Agricoltura, le Foreste, la Natura e l'Energia, University of Tuscia, Viterbo 01100, Italy
M. C. Rulli
Dipartimento di Ingegneria Idraulica, Ambientale, Infrastrutture Viarie, Rilevamento, Politecnico di Milano, Milano 20133, Italy
M. Porfiri
Department of Mechanical and Aerospace Engineering, Polytechnic Institute of New York University, Brooklyn, NY 11201, USA
Related subject area
Subject: Hillslope hydrology | Techniques and Approaches: Instruments and observation techniques
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Evaporation, infiltration and storage of soil water in different vegetation zones in the Qilian Mountains: a stable isotope perspective
Groundwater fluctuations during a debris flow event in western Norway – triggered by rain and snowmelt
Satellite rainfall products outperform ground observations for landslide prediction in India
Characterising hillslope–stream connectivity with a joint event analysis of stream and groundwater levels
Structural and functional control of surface-patch to hillslope runoff and sediment connectivity in Mediterranean dry reclaimed slope systems
Distinct stores and the routing of water in the deep critical zone of a snow-dominated volcanic catchment
Hydrological trade-offs due to different land covers and land uses in the Brazilian Cerrado
A sprinkling experiment to quantify celerity–velocity differences at the hillslope scale
Impacts of a capillary barrier on infiltration and subsurface stormflow in layered slope deposits monitored with 3-D ERT and hydrometric measurements
Form and function in hillslope hydrology: characterization of subsurface flow based on response observations
Form and function in hillslope hydrology: in situ imaging and characterization of flow-relevant structures
Identification of runoff formation with two dyes in a mid-latitude mountain headwater
Multiple runoff processes and multiple thresholds control agricultural runoff generation
Factors influencing stream baseflow transit times in tropical montane watersheds
Effects of a deep-rooted crop and soil amended with charcoal on spatial and temporal runoff patterns in a degrading tropical highland watershed
The water balance components of undisturbed tropical woodlands in the Brazilian cerrado
Erosion processes in black marl soils at the millimetre scale: preliminary insights from an analogous model
Monitoring hillslope moisture dynamics with surface ERT for enhancing spatial significance of hydrometric point measurements
Development and testing of a large, transportable rainfall simulator for plot-scale runoff and parameter estimation
True colors – experimental identification of hydrological processes at a hillslope prone to slide
Assessment of shallow subsurface characterisation with non-invasive geophysical methods at the intermediate hill-slope scale
Macropore flow of old water revisited: experimental insights from a tile-drained hillslope
Hillslope characteristics as controls of subsurface flow variability
Soil-water dynamics and unsaturated storage during snowmelt following wildfire
Use of the 3-D scanner in mapping and monitoring the dynamic degradation of soils: case study of the Cucuteni-Baiceni Gully on the Moldavian Plateau (Romania)
A porewater-based stable isotope approach for the investigation of subsurface hydrological processes
Subsurface lateral flow from hillslope and its contribution to nitrate loading in streams through an agricultural catchment during subtropical rainstorm events
The effect of slope steepness and antecedent moisture content on interrill erosion, runoff and sediment size distribution in the highlands of Ethiopia
Surface and subsurface flow effect on permanent gully formation and upland erosion near Lake Tana in the northern highlands of Ethiopia
The benefits of gravimeter observations for modelling water storage changes at the field scale
Shallow soil moisture – ground thaw interactions and controls – Part 1: Spatiotemporal patterns and correlations over a subarctic landscape
Shallow soil moisture – ground thaw interactions and controls – Part 2: Influences of water and energy fluxes
Plot and field scale soil moisture dynamics and subsurface wetness control on runoff generation in a headwater in the Ore Mountains
Anne Hartmann, Markus Weiler, Konrad Greinwald, and Theresa Blume
Hydrol. Earth Syst. Sci., 26, 4953–4974, https://doi.org/10.5194/hess-26-4953-2022, https://doi.org/10.5194/hess-26-4953-2022, 2022
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Analyzing the impact of soil age and rainfall intensity on vertical subsurface flow paths in calcareous soils, with a special focus on preferential flow occurrence, shows how water flow paths are linked to the organization of evolving landscapes. The observed increase in preferential flow occurrence with increasing moraine age provides important but rare data for a proper representation of hydrological processes within the feedback cycle of the hydro-pedo-geomorphological system.
Guofeng Zhu, Leilei Yong, Xi Zhao, Yuwei Liu, Zhuanxia Zhang, Yuanxiao Xu, Zhigang Sun, Liyuan Sang, and Lei Wang
Hydrol. Earth Syst. Sci., 26, 3771–3784, https://doi.org/10.5194/hess-26-3771-2022, https://doi.org/10.5194/hess-26-3771-2022, 2022
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In arid areas, the processes of water storage have not been fully understood in different vegetation zones in mountainous areas. This study monitored the stable isotopes in the precipitation and soil water of the Xiying River Basin. In the four vegetation zones, soil water evaporation intensities were mountain grassland > deciduous forest > coniferous forest > alpine meadow, and soil water storage capacity was alpine meadow > deciduous forest > coniferous forest > mountain grassland.
Stein Bondevik and Asgeir Sorteberg
Hydrol. Earth Syst. Sci., 25, 4147–4158, https://doi.org/10.5194/hess-25-4147-2021, https://doi.org/10.5194/hess-25-4147-2021, 2021
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Pore pressure is important for the trigger of debris slides and flows. But how, exactly, does the pore pressure vary just before a slide happens? We drilled and installed a piezometer 1.6 m below the ground in a hillslope susceptible to debris flows in western Norway and measured pore pressure and water temperature through the years 2010–2013. We found the largest anomaly in our groundwater data during the storm named Hilde in November in 2013, when a debris flow happened in this slope.
Maria Teresa Brunetti, Massimo Melillo, Stefano Luigi Gariano, Luca Ciabatta, Luca Brocca, Giriraj Amarnath, and Silvia Peruccacci
Hydrol. Earth Syst. Sci., 25, 3267–3279, https://doi.org/10.5194/hess-25-3267-2021, https://doi.org/10.5194/hess-25-3267-2021, 2021
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Satellite and rain gauge data are tested to predict landslides in India, where the annual toll of human lives and loss of property urgently demands the implementation of strategies to prevent geo-hydrological instability. For this purpose, we calculated empirical rainfall thresholds for landslide initiation. The validation of thresholds showed that satellite-based rainfall data perform better than ground-based data, and the best performance is obtained with an hourly temporal resolution.
Daniel Beiter, Markus Weiler, and Theresa Blume
Hydrol. Earth Syst. Sci., 24, 5713–5744, https://doi.org/10.5194/hess-24-5713-2020, https://doi.org/10.5194/hess-24-5713-2020, 2020
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We investigated the interactions between streams and their adjacent hillslopes in terms of water flow. It could be revealed that soil structure has a strong influence on how hillslopes connect to the streams, while the groundwater table tells us a lot about when the two connect. This observation could be used to improve models that try to predict whether or not hillslopes are in a state where a rain event will be likely to produce a flood in the stream.
Mariano Moreno-de-las-Heras, Luis Merino-Martín, Patricia M. Saco, Tíscar Espigares, Francesc Gallart, and José M. Nicolau
Hydrol. Earth Syst. Sci., 24, 2855–2872, https://doi.org/10.5194/hess-24-2855-2020, https://doi.org/10.5194/hess-24-2855-2020, 2020
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This study shifts from present discussions of the connectivity theory to the practical application of the connectivity concept for the analysis of runoff and sediment dynamics in Mediterranean dry slope systems. Overall, our results provide evidence for the feasibility of using the connectivity concept to understand how the spatial distribution of vegetation and micro-topography (including rills) interact with rainfall dynamics to generate spatially continuous runoff and sediment fluxes.
Alissa White, Bryan Moravec, Jennifer McIntosh, Yaniv Olshansky, Ben Paras, R. Andres Sanchez, Ty P. A. Ferré, Thomas Meixner, and Jon Chorover
Hydrol. Earth Syst. Sci., 23, 4661–4683, https://doi.org/10.5194/hess-23-4661-2019, https://doi.org/10.5194/hess-23-4661-2019, 2019
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This paper examines the influence of the subsurface structure on water routing, water residence times, and the hydrologic response of distinct groundwater stores and further investigates their contribution to streamflow. We conclude that deep groundwater from the fractured aquifer system, rather than shallow groundwater, is the dominant source of streamflow, which highlights the need to better characterize the deep subsurface of mountain systems using interdisciplinary studies such as this one.
Jamil A. A. Anache, Edson Wendland, Lívia M. P. Rosalem, Cristian Youlton, and Paulo T. S. Oliveira
Hydrol. Earth Syst. Sci., 23, 1263–1279, https://doi.org/10.5194/hess-23-1263-2019, https://doi.org/10.5194/hess-23-1263-2019, 2019
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We assessed the water balance over 5 years in different land uses typical of the Brazilian Cerrado: tropical woodland, bare land, pasture and sugarcane. Land uses may affect hillslope hydrology and cause trade-offs; the woodland consumes the soil water storage along the dry season, while the agricultural LCLU (pasture and sugarcane) reduces the water consumption in either season, and the aquifer recharge rates may be reduced in forested areas due to increased water demand by the vegetation.
Willem J. van Verseveld, Holly R. Barnard, Chris B. Graham, Jeffrey J. McDonnell, J. Renée Brooks, and Markus Weiler
Hydrol. Earth Syst. Sci., 21, 5891–5910, https://doi.org/10.5194/hess-21-5891-2017, https://doi.org/10.5194/hess-21-5891-2017, 2017
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How stream water responds immediately to a rainfall or snow event, while the average time it takes water to travel through the hillslope can be years or decades and is poorly understood. We assessed this difference by combining a 24-day sprinkler experiment (a tracer was applied at the start) with a process-based hydrologic model. Immobile soil water, deep groundwater contribution and soil depth variability explained this difference at our hillslope site.
Rico Hübner, Thomas Günther, Katja Heller, Ursula Noell, and Arno Kleber
Hydrol. Earth Syst. Sci., 21, 5181–5199, https://doi.org/10.5194/hess-21-5181-2017, https://doi.org/10.5194/hess-21-5181-2017, 2017
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In our study, we used a spatially and temporally high resolved 3-D ERT in addition to matric potential measurements to monitor the infiltration and subsurface water flow on a hillslope with layered slope deposits. We derived some interesting findings about the capillary barrier effect as a main driving factor for the activation of different flow pathways. Thus, the maintenance or breakdown of a capillary barrier has a decisive influence on the precipitation runoff response of of the catchment.
Lisa Angermann, Conrad Jackisch, Niklas Allroggen, Matthias Sprenger, Erwin Zehe, Jens Tronicke, Markus Weiler, and Theresa Blume
Hydrol. Earth Syst. Sci., 21, 3727–3748, https://doi.org/10.5194/hess-21-3727-2017, https://doi.org/10.5194/hess-21-3727-2017, 2017
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This study investigates the temporal dynamics and response velocities of lateral preferential flow at the hillslope. The results are compared to catchment response behavior to infer the large-scale implications of the observed processes. A large portion of mobile water flows through preferential flow paths in the structured soils, causing an immediate discharge response. The study presents a methodological approach to cover the spatial and temporal domain of these highly heterogeneous processes.
Conrad Jackisch, Lisa Angermann, Niklas Allroggen, Matthias Sprenger, Theresa Blume, Jens Tronicke, and Erwin Zehe
Hydrol. Earth Syst. Sci., 21, 3749–3775, https://doi.org/10.5194/hess-21-3749-2017, https://doi.org/10.5194/hess-21-3749-2017, 2017
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Rapid subsurface flow in structured soils facilitates fast vertical and lateral redistribution of event water. We present its in situ exploration through local measurements and irrigation experiments. Special emphasis is given to a coherent combination of hydrological and geophysical methods. The study highlights that form and function operate as conjugated pairs. Dynamic imaging through time-lapse GPR was key to observing both and to identifying hydrologically relevant structures.
Lukáš Vlček, Kristýna Falátková, and Philipp Schneider
Hydrol. Earth Syst. Sci., 21, 3025–3040, https://doi.org/10.5194/hess-21-3025-2017, https://doi.org/10.5194/hess-21-3025-2017, 2017
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The role of mountain headwater area in hydrological cycle was investigated at two opposite hillslopes covered by mineral and organic soils. Similarities and differences in percolation and preferential flow paths between the hillslopes were identified by sprinkling experiments with Brilliant Blue and Fluorescein. The dye solutions infiltrated into the soil and continued either as lateral subsurface pipe flow (organic soil), or percolated vertically towards the bedrock (mineral soil).
Shabnam Saffarpour, Andrew W. Western, Russell Adams, and Jeffrey J. McDonnell
Hydrol. Earth Syst. Sci., 20, 4525–4545, https://doi.org/10.5194/hess-20-4525-2016, https://doi.org/10.5194/hess-20-4525-2016, 2016
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A variety of threshold mechanisms influence the transfer of rainfall to runoff from catchments. Some of these mechanisms depend on the occurrence of intense rainfall and others depend on the catchment being wet. This article first provides a framework for considering which mechanisms are important in different situations and then uses that framework to examine the behaviour of a catchment in Australia that exhibits a mix of both rainfall intensity and catchment wetness dependent thresholds.
Lyssette E. Muñoz-Villers, Daniel R. Geissert, Friso Holwerda, and Jeffrey J. McDonnell
Hydrol. Earth Syst. Sci., 20, 1621–1635, https://doi.org/10.5194/hess-20-1621-2016, https://doi.org/10.5194/hess-20-1621-2016, 2016
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This study provides an important first step towards a better understanding of the hydrology of tropical montane regions and the factors influencing baseflow mean transit times (MTT). Our MTT estimates ranged between 1.2 and 2.7 years, suggesting deep and long subsurface pathways contributing to sustain dry season flows. Our findings showed that topography and subsurface permeability are the key factors controlling baseflow MTTs. Longest MTTs were found in the cloud forest headwater catchments.
Haimanote K. Bayabil, Tigist Y. Tebebu, Cathelijne R. Stoof, and Tammo S. Steenhuis
Hydrol. Earth Syst. Sci., 20, 875–885, https://doi.org/10.5194/hess-20-875-2016, https://doi.org/10.5194/hess-20-875-2016, 2016
P. T. S. Oliveira, E. Wendland, M. A. Nearing, R. L. Scott, R. Rosolem, and H. R. da Rocha
Hydrol. Earth Syst. Sci., 19, 2899–2910, https://doi.org/10.5194/hess-19-2899-2015, https://doi.org/10.5194/hess-19-2899-2015, 2015
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We determined the main components of the water balance for an undisturbed cerrado.
Evapotranspiration ranged from 1.91 to 2.60mm per day for the dry and wet seasons, respectively. Canopy interception ranged from 4 to 20% and stemflow values were approximately 1% of gross precipitation.
The average runoff coefficient was less than 1%, while cerrado deforestation has the potential to increase that amount up to 20-fold.
The water storage may be estimated by the difference between P and ET.
J. Bechet, J. Duc, M. Jaboyedoff, A. Loye, and N. Mathys
Hydrol. Earth Syst. Sci., 19, 1849–1855, https://doi.org/10.5194/hess-19-1849-2015, https://doi.org/10.5194/hess-19-1849-2015, 2015
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High-resolution three-dimensional point clouds are used to analyse erosion processes at the millimetre scale. The processes analysed here play a role in the closure of cracks. We demonstrated how micro-scale infiltration can influence the degradation of soil surface by inducing downward mass movements that are not reversible. This development will aid in designing future experiments to analyse processes such as swelling, crack closure, micro-landslides, etc.
R. Hübner, K. Heller, T. Günther, and A. Kleber
Hydrol. Earth Syst. Sci., 19, 225–240, https://doi.org/10.5194/hess-19-225-2015, https://doi.org/10.5194/hess-19-225-2015, 2015
T. G. Wilson, C. Cortis, N. Montaldo, and J. D. Albertson
Hydrol. Earth Syst. Sci., 18, 4169–4183, https://doi.org/10.5194/hess-18-4169-2014, https://doi.org/10.5194/hess-18-4169-2014, 2014
P. Schneider, S. Pool, L. Strouhal, and J. Seibert
Hydrol. Earth Syst. Sci., 18, 875–892, https://doi.org/10.5194/hess-18-875-2014, https://doi.org/10.5194/hess-18-875-2014, 2014
S. Popp, D. Altdorff, and P. Dietrich
Hydrol. Earth Syst. Sci., 17, 1297–1307, https://doi.org/10.5194/hess-17-1297-2013, https://doi.org/10.5194/hess-17-1297-2013, 2013
J. Klaus, E. Zehe, M. Elsner, C. Külls, and J. J. McDonnell
Hydrol. Earth Syst. Sci., 17, 103–118, https://doi.org/10.5194/hess-17-103-2013, https://doi.org/10.5194/hess-17-103-2013, 2013
S. Bachmair and M. Weiler
Hydrol. Earth Syst. Sci., 16, 3699–3715, https://doi.org/10.5194/hess-16-3699-2012, https://doi.org/10.5194/hess-16-3699-2012, 2012
B. A. Ebel, E. S. Hinckley, and D. A. Martin
Hydrol. Earth Syst. Sci., 16, 1401–1417, https://doi.org/10.5194/hess-16-1401-2012, https://doi.org/10.5194/hess-16-1401-2012, 2012
G. Romanescu, V. Cotiuga, A. Asandulesei, and C. Stoleriu
Hydrol. Earth Syst. Sci., 16, 953–966, https://doi.org/10.5194/hess-16-953-2012, https://doi.org/10.5194/hess-16-953-2012, 2012
J. Garvelmann, C. Külls, and M. Weiler
Hydrol. Earth Syst. Sci., 16, 631–640, https://doi.org/10.5194/hess-16-631-2012, https://doi.org/10.5194/hess-16-631-2012, 2012
B. Zhang, J. L. Tang, Ch. Gao, and H. Zepp
Hydrol. Earth Syst. Sci., 15, 3153–3170, https://doi.org/10.5194/hess-15-3153-2011, https://doi.org/10.5194/hess-15-3153-2011, 2011
M. B. Defersha, S. Quraishi, and A. Melesse
Hydrol. Earth Syst. Sci., 15, 2367–2375, https://doi.org/10.5194/hess-15-2367-2011, https://doi.org/10.5194/hess-15-2367-2011, 2011
T. Y. Tebebu, A. Z. Abiy, A. D. Zegeye, H. E. Dahlke, Z. M. Easton, S. A. Tilahun, A. S. Collick, S. Kidnau, S. Moges, F. Dadgari, and T. S. Steenhuis
Hydrol. Earth Syst. Sci., 14, 2207–2217, https://doi.org/10.5194/hess-14-2207-2010, https://doi.org/10.5194/hess-14-2207-2010, 2010
B. Creutzfeldt, A. Güntner, S. Vorogushyn, and B. Merz
Hydrol. Earth Syst. Sci., 14, 1715–1730, https://doi.org/10.5194/hess-14-1715-2010, https://doi.org/10.5194/hess-14-1715-2010, 2010
X. J. Guan, C. J. Westbrook, and C. Spence
Hydrol. Earth Syst. Sci., 14, 1375–1386, https://doi.org/10.5194/hess-14-1375-2010, https://doi.org/10.5194/hess-14-1375-2010, 2010
X. J. Guan, C. Spence, and C. J. Westbrook
Hydrol. Earth Syst. Sci., 14, 1387–1400, https://doi.org/10.5194/hess-14-1387-2010, https://doi.org/10.5194/hess-14-1387-2010, 2010
E. Zehe, T. Graeff, M. Morgner, A. Bauer, and A. Bronstert
Hydrol. Earth Syst. Sci., 14, 873–889, https://doi.org/10.5194/hess-14-873-2010, https://doi.org/10.5194/hess-14-873-2010, 2010
Cited articles
Armand, R., Bockstaller, C., Auzet, A.-V., and Van Dijk, P.: Runoff generation related to intra-field soil surface characteristics variability: Application to conservation tillage context, Soil Till. Res., 102, 27–37, 2009.
Berger, C., Schulze, M., Rieke-Zapp, D., and Schlunegger, F.: Rill development and soil erosion: a laboratory study of slope and rainfall intensity, Earth Surf. Proc. Land., 35, 1456–1467, 2010.
Berman, E. S. F., Gupta, M., Gabrielli, C., Garland, T., and McDonnell, J. J.: High-frequency field-deployable isotope analyzer for hydrological applications, Water Resour. Res., 45, W10201, https://doi.org/10.1029/2009WR008265, 2009.
Budai, P. and Clement, A.: Refinement of national-scale heavy metal load estimations in road runoff based on field measurements, Transport. Res. D-Tr. E., 16, 244–250, 2011.
Domingo, F., Villagarc\'{i}a, L., Boer, M. M., Alados-Arboledas, L., and Puigdefábregas, J.: Evaluating the long-term water balance of arid zone stream bed vegetation using evapotranspiration modelling and hillslope runoff measurements, J. Hydrol., 243, 17–30, 2001.
Doody, D. G., Higgins, A., Matthews, D., Foy, R. H., Pilatova, K., Duffy, O., and Watson, C. J.: Overland flow initiation from a drumlin grassland hillslope, Soil Use Manage., 26, 286–298, 2010.
Dunjó, G., Pardini, G., and Gispert, M.: The role of land use-land cover on runoff generation and sediment yield at a microplot scale, in a small {M}editerranean catchment, J. Arid Environ., 57, 99–116, 2004.
Dunkerley, L. D.: Estimating the mean speed of laminar overland flow using dye injection-uncertainty on rough surfaces, Earth Surf. Proc. Land., 26, 363–374, 2001.
Dunkerley, L. D.: An optical tachometer for short-path measurement of flow speeds in shallow overland flows: improved alternative to dye timing, Earth Surf. Proc. Land., 28, 777–786, 2003.
Esteves, M., Planchon, O., Lapetite, J. M., Silvera, N., and Cadet, P.: The "{E}mire" large rainfall simulator: design and field testing, Earth Surf. Proc. Land., 25, 681–690, 2000.
Fiener, P. and Auerswald, K.: Measurement and modeling of concentrated runoff in grassed waterways, J. Hydrol., 301, 198–215, 2005.
Finkner, S. C. and Gilley, J. E.: Sediment and dye concentration effects on fluorescence, Appl. Eng. Agric., 2, 104–107, 1986.
Ghahramani, A., Ishikawa, Y., Gomi, T., Shiraki, K., and Miyata, S.: Effect of ground cover on splash and sheetwash erosion over a steep forested hillslope: A plot-scale study, CATENA, 85, 34–47, 2011.
Gomi, T., Sidle, R. C., Miyata, S., Kosugi, K., and Onda, Y.: Dynamic runoff connectivity of overland flow on steep forested hillslopes: Scale effects and runoff transfer, Water Resour. Res., 44, W08411, https://doi.org/10.1029/2007WR005894, 2008{a}.
Gomi, T., Sidle, R. C., Ueno, M., Miyata, S., and Kosugi, K.: Characteristics of overland flow generation on steep forested hillslopes of central J}apan, J. Hydrol., 361, 275–290, 2008{b.
Gonzalez, R. C., Woods, R. E., and Eddins, S. L.: Digital Image Processing using MATLAB, Pearson Prentice-Hall, Upper Saddle River, NJ, 2004.
Haralick, R. M., Sternberg, S. R., and Zhuang, X.: Image analysis using mathematical morphology, IEEE T. Pattern. Anal., PAMI-9, 532–550, 1987.
Hopp, L. and McDonnell, J. J.: Connectivity at the hillslope scale: Identifying interactions between storm size, bedrock permeability, slope angle and soil depth, J. Hydrol., 376, 378–391, 2009.
Hudson, J. A.: The impact of sediment on open channel flow measurement in selected UK experimental basins, Flow Meas. Instrum., 15, 49–58, 2004.
Hussein, M. H., Kariem, T. H., and Othman, A. K.: Predicting soil erodibility in northern {I}raq using natural runoff plot data, Soil Till. Res., 94, 220–228, 2007.
Jodeau, M., Hauet, A., Paquier, A., Le Coz, J., and Dramais, G.: Application and evaluation of LS-PIV technique for the monitoring of river surface velocities in high flow conditions, Flow Meas. Instrum., 19, 117–127, 2008.
Johnson, A. C., Haria, A. H., Bhardwaj, C. L., Williams, R. J., and Walker, A.: Preferential flow pathways and their capacity to transport isoproturon in a structured clay soil, Pestic. Sci., 48, 225–237, 1996.
Jost, G., Schume, H., Hager, H., Markart, G., and Kohl, B.: A hillslope scale comparison of tree species influence on soil moisture dynamics and runoff processes during intense rainfall, J. Hydrol., 420–421, 112–124, 2012.
Laloy, E. and Bielders, C. L.: Plot scale continuous modelling of runoff in a maize cropping system with dynamic soil surface properties, J. Hydrol., 349, 455–469, 2008.
Lange, J., Greenbaum, N., Husary, S., Timmer, J., Leibundgut, C., and Schick, A. P.: Tracers for runoff generation studies in a Mediterranean region: comparison of different scales, in: Hydrology of the Mediterranean and Semiarid Regions, edited by: Servat, E., Najem, W., Leduc, C., and Shakeel, A., 278, 117–123, IAHS, Montpellier, France, 2003.
LeCoz, J., Hauet, A., Pierrefeu, G., Dramais, G., and Camenen, B.: Performance of image-based velocimetry (LSPIV) applied to flash-flood discharge measurements in {M}editerranean rivers, J. Hydrol., 394, 42–52, 2010.
Lee, M. C., Lai, C. J., Leu, J. M., Plant, W. J., Keller, W. C., and Hayes, K.: Non-contact flood discharge measurements using an X}-band pulse radar {(I) {T}heory, Flow Meas. Instrum., 13, 265–270, 2002.
Legout, C., Darboux, F., Nédélec, Y., Hauet, A., Esteves, M., Renaux, B., Denis, H., and Cordier, S.: High spatial resolution mapping of surface velocities and depths for shallow overland flow, Earth Surf. Proc. Land., 37, 984–993, 2012.
Léonard, J., Ancelin, O., Ludwig, B., and Richard, G.: Analysis of the dynamics of soil infiltrability of agricultural soils from continuous rainfall-runoff measurements on small plots, J. Hydrol., 326, 122–134, 2006.
Li, G.: Preliminary study of the interference of surface objects and rainfall in overland flow resistance, CATENA, 78, 154–158, 2009.
Mathys, N., Klotz, S., Esteves, M., Descroix, M., and Lapetite, J. M.: Runoff and erosion in the {B}lack {M}arls of the {F}rench {A}lps: Observations and measurements at the plot scale, CATENA, 63, 261–281, 2005.
Mayor, A. G., Bautista, S., and Bellot, J.: Scale-dependent variation in runoff and sediment yield in a semiarid {M}editerranean catchment, J. Hydrol., 397, 128–135, 2011.
McGuire, K. J. and McDonnell, J. J.: Hydrological connectivity of hillslopes and streams: Characteristic time scales and nonlinearities, Water Resour. Res., 46, W10543, https://doi.org/10.1029/2010WR009341, 2010.
McGuire, K. J., Weiler, M., and McDonnell, J. J.: Integrating tracer experiments with modeling to assess runoff processes and water transit times, Adv. Water Resour., 30, 824–837, 2007.
McMillan, H., Tetzlaff, D., Clark, M., and Soulsby, C.: Do time-variable tracers aid the evaluation of hydrological model structure? A multimodel approach, Water Resour. Res., 48, W05501, https://doi.org/10.1029/2011WR011688, 2012.
Mügler, C., Planchon, O., Patin, J., Weill, S., Silvera, N., Richard, P., and Mouche, E.: Comparison of roughness models to simulate overland flow and tracer transport experiments under simulated rainfall at plot scale, J. Hydrol., 402, 25–40, 2011.
Muste, M., Fujita, I., and Hauet, A.: Large-scale particle image velocimetry for measurements in riverine environments, Water Resour. Res., 44, W00D19, https://doi.org/10.1029/2008WR006950, 2008.
Muste, M., Ho, H.-C., and Kim, D.: Considerations on direct stream flow measurements using video imagery: {O}utlook and research needs, J. Hydro-Environ. Res., 5, 289–300, 2011.
Patin, J., Mouche, E., Ribolzi, O., Chaplot, V., Sengtahevanghoung, O., Latsachak, K. O., Soulileuth, B., and Valentin, C.: Analysis of runoff production at the plot scale during a long-term survey of a small agricultural catchment in L}ao {PDR, J. Hydrol., 426–427, 79–92, 2012.
Pérez-Latorre, F. J., deCastro, L., and Delgado, A.: A comparison of two variable intensity rainfall simulators for runoff studies, Soil Till. Res., 107, 11–16, 2010.
Planchon, O., Silvera, N., Gimenez, R., Favis-Mortlock, D., Wainwright, J., Le Bissonnais, Y., and Govers, G.: An automated salt-tracing gauge for flow-velocity measurement, Earth Surf. Proc. Land., 30, 833–844, 2005.
Puleo, J. A., McKenna, T. E., Holland, K. T., and Calantoni, J.: Quantifying riverine surface currents from time sequences of thermal infrared imagery, Water Resour. Res., 48, W01527, https://doi.org/10.1029/2011WR010770, 2012.
Qu, L., Zhao, J., Zhao, X., Yan, L., Zhou, J., and Lei, T.: A mechanic-electronic sensor for automatic measurement of sediment-laden flow rate from erosion runoff plots, J. Hydrol., 342, 42–49, 2007.
Riley, S. J. and Hancock, F.: A rainfall simulator for hydrologic and erosion experiments on mines, with an example of its applications at {R}anger {U}ranium {M}ine, {N}orthern {T}erritory, {A}ustralia, The Australiasian Institute of Mining and Metallurgy Proceedings, 1, 3–8, 1997.
Rosso, R., Rulli, M. C., and Bocchiola, D.: Transient catchment hydrology after wildfires in a Mediterranean basin: runoff, sediment and woody debris, Hydrol. Earth Syst. Sci., 11, 125–140, https://doi.org/10.5194/hess-11-125-2007, 2007.
Rulli, M. C., Bozzi, S., Spada, M., Bocchiola, D., and Rosso, R.: Rainfall simulations on a fire disturbed mediterranean area, J. Hydrol., 327, 323–338, 2006.
Sadeghi, S. H. R., Bashari Seghaleh, M., and Rangavar, A. S.: Plot sizes dependency of runoff and sediment yield estimates from a small watershed, CATENA, in press, 2012.
Scherrer, S., Naef, F., Faeh, A. O., and Cordery, I.: Formation of runoff at the hillslope scale during intense precipitation, Hydrol. Earth Syst. Sci., 11, 907–922, https://doi.org/10.5194/hess-11-907-2007, 2007.
Tatard, L., Planchon, O., Wainwright, J., Nord, G., Favis-Mortlock, D., Silvera, N., Ribolzi, O., Esteves, M., and Huang, C. H.: Measurement and modelling of high-resolution flow-velocity data under simulated rainfall on a low-slope sandy soil, J. Hydrol., 348, 1–12, 2008.
Tauro, F., Aureli, M., Porfiri, M., and Grimaldi, S.: Characterization of buoyant fluorescent particles for field observations of water flows, Sensors, 10, 11512–11529, 2010.
Tauro, F., Grimaldi, S., Petroselli, A., and Porfiri, M.: Fluorescent particle tracers in surface hydrology: a proof of concept in a natural stream, Water Resour. Res., 48, W06528, https://doi.org/10.1029/2011WR011610, 2012{a}.
Tauro, F., Pagano, C., Porfiri, M., and Grimaldi, S.: Tracing of shallow water flows through buoyant fluorescent particles, Flow Meas. Instrum., 26, 93–101, 2012{b}.
Ticehurst, J. L., Cresswell, H. P., McKenzie, N. J., and Glover, M. R.: Interpreting soil and topographic properties to conceptualise hillslope hydrology, Geoderma, 137, 279–292, 2007.
Uchida, T. and Asano, Y.: Spatial variability in the flowpath of hillslope runoff and streamflow in a meso-scale catchment, Hydrol. Process., 24, 2277–2286, 2010.
Vacca, A., Loddo, S., Ollesch, G., Puddu, R., Serra, G., Tomasi, D., and Aru, A.: Measurement of runoff and soil erosion in three areas under different land use in {S}ardinia ({I}taly), CATENA, 40, 69–92, 2000.
