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@ARTICLE{Antoine:15975,
author = {Antoine, M. and Javaux, M. and Bielders, C.L.},
title = {{I}ntegrating subgrid connectivity properties of the
micro-topography in distributed runoff models, at the
interrill scale},
journal = {Journal of hydrology},
volume = {403},
issn = {0022-1694},
address = {Amsterdam [u.a.]},
publisher = {Elsevier},
reportid = {PreJuSER-15975},
year = {2011},
note = {Record converted from VDB: 12.11.2012},
abstract = {The 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.},
keywords = {J (WoSType)},
cin = {IBG-3},
ddc = {690},
cid = {I:(DE-Juel1)IBG-3-20101118},
pnm = {Terrestrische Umwelt},
pid = {G:(DE-Juel1)FUEK407},
shelfmark = {Engineering, Civil / Geosciences, Multidisciplinary / Water
Resources},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000291914200002},
doi = {10.1016/j.jhydrol.2011.03.027},
url = {https://juser.fz-juelich.de/record/15975},
}