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000015975 0247_ $$2DOI$$a10.1016/j.jhydrol.2011.03.027
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000015975 084__ $$2WoS$$aEngineering, Civil
000015975 084__ $$2WoS$$aGeosciences, Multidisciplinary
000015975 084__ $$2WoS$$aWater Resources
000015975 1001_ $$0P:(DE-HGF)0$$aAntoine, M.$$b0
000015975 245__ $$aIntegrating subgrid connectivity properties of the micro-topography in distributed runoff models, at the interrill scale
000015975 260__ $$aAmsterdam [u.a.]$$bElsevier$$c2011
000015975 300__ $$a
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000015975 440_0 $$03413$$aJournal of Hydrology$$v403$$x0022-1694$$y3
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000015975 520__ $$aThe spatial configuration of micro-topography affects the runoff connectivity at the interrill scale and, therefore, the shape of the hydrograph. In a previous study, we demonstrated the ability of the so-called Relative Surface Connection (RSC) function to capture, at the grid scale, the evolution of the contributing area as a function of the depression storage filling. However, this function neglects the effect of surface detention, which is proportional to the runoff rate and which must be taken into account if one wants to predict correctly the discharge dynamics. Therefore we tested two corrective procedures in association with the RSC function to integrate, at the grid scale, the effects of both depression storage and surface detention dynamics. The weighted-source corrective procedure consists in weighing the effective supply of water between depression storage and runoff using the RSC function. The weighted-surface corrective procedure consists in splitting a single grid into parallel independent strips whose sizes depend on the RSC function and which activate at various times and then participate to the global runoff production. Those methods allowed to mimic in a simple way and at the grid scale synthetical and experimental hydrographs for complex subgrid micro-topographies.The weighted-source and especially the weighted-surface corrective procedures improved the hydrograph prediction compared to the classical approach where runoff only starts when depression storage capacity is full. In a purely numerical framework with four runoff scenarios on highly contrasted micro-topographies, this improvement was reflected in a significant increase of the median Nash and Sutcliffe coefficients E-50 (E-50 = 0.29 for the classical approach, E-50 = 0.67 for the weighted-source procedure and E-50 = 0.94 for the weighted-surface procedure).For the depression storage filling, an alternative to the Linsley equation was found and allowed a better description of surface runoff before maximal depression storage was reached. This was reflected in an increase of the E-50 computed for 27 overland flow experiments under laboratory conditions and their equivalent model results(E-50 = 0.89 for the Linsley approach, E-50 = 0.94 with the proposed 'uniform' multiple-compartment conceptual approach, and E-50 = 0.85 for the classical approach where runoff only starts when depression storage capacity is full). (C) 2011 Elsevier B.V. All rights reserved.
000015975 536__ $$0G:(DE-Juel1)FUEK407$$2G:(DE-HGF)$$aTerrestrische Umwelt$$cP24$$x0
000015975 588__ $$aDataset connected to Web of Science
000015975 650_7 $$2WoSType$$aJ
000015975 65320 $$2Author$$aConnectivity
000015975 65320 $$2Author$$aGrid-scale modeling
000015975 65320 $$2Author$$aRunoff
000015975 65320 $$2Author$$aUpscaling
000015975 65320 $$2Author$$aDepression storage
000015975 65320 $$2Author$$aSurface detention
000015975 7001_ $$0P:(DE-Juel1)129477$$aJavaux, M.$$b1$$uFZJ
000015975 7001_ $$0P:(DE-HGF)0$$aBielders, C.L.$$b2
000015975 773__ $$0PERI:(DE-600)1473173-3$$a10.1016/j.jhydrol.2011.03.027$$gVol. 403$$q403$$tJournal of hydrology$$v403$$x0022-1694$$y2011
000015975 8567_ $$uhttp://dx.doi.org/10.1016/j.jhydrol.2011.03.027
000015975 909CO $$ooai:juser.fz-juelich.de:15975$$pVDB$$pVDB:Earth_Environment
000015975 9131_ $$0G:(DE-Juel1)FUEK407$$bErde und Umwelt$$kP24$$lTerrestrische Umwelt$$vTerrestrische Umwelt$$x0
000015975 9132_ $$0G:(DE-HGF)POF3-259H$$1G:(DE-HGF)POF3-250$$2G:(DE-HGF)POF3-200$$aDE-HGF$$bMarine, Küsten- und Polare Systeme$$lTerrestrische Umwelt$$vAddenda$$x0
000015975 9141_ $$y2011
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