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@ARTICLE{Minet:15987,
author = {Minet, J. and Laloy, E. and Lambot, S. and Vanclooster, M.},
title = {{E}ffect of high-resolution spatial soil moisture
variability on simulated runoff response using a distributed
hydrologic model},
journal = {Hydrology and earth system sciences},
volume = {15},
issn = {1027-5606},
address = {Katlenburg-Lindau},
publisher = {EGU},
reportid = {PreJuSER-15987},
pages = {1323 - 1338},
year = {2011},
note = {The research presented in this paper was funded by the
Belgian Science Policy Office in the frame of the Stereo II
programme - project SR/00/100 (HYDRASENS). We thank all the
people who participated to the GPR field surveys presented
in this paper. We are grateful to the editor and three
anonymous reviewers for the revision of this paper.},
abstract = {The importance of spatial variability of antecedent soil
moisture conditions on runoff response is widely
acknowledged in hillslope hydrology. Using a distributed
hydrologic model, this paper aims at investigating the
effects of soil moisture spatial variability on runoff in
various field conditions and at finding the structure of the
soil moisture pattern that approaches the measured soil
moisture pattern in terms of field scale runoff. High
spatial resolution soil moisture was surveyed in ten
different field campaigns using a proximal ground
penetrating radar (GPR) mounted on a mobile platform. Based
on these soil moisture measurements, seven scenarios of
spatial structures of antecedent soil moisture were used and
linked with a field scale distributed hydrological model to
simulate field scale runoff. Accounting for spatial
variability of soil moisture resulted in general in higher
predicted field scale runoff as compared to the case where
soil moisture was kept constant. The ranges of possible
hydrographs were delineated by extreme scenarios where soil
moisture was directly and inversely modelled according to
the topographic wetness index (TWI). These behaviours could
be explained by the sizes and locations of runoff
contributing areas, knowing that runoff was generated by
infiltration excess over a certain soil moisture threshold.
The most efficient scenario for modelling the within field
spatial structure of soil moisture appeared to be when soil
moisture is directly arranged according to the TWI,
especially when measured soil moisture and TWI were
correlated. The novelty of this work is to benefit from a
large set of high-resolution soil moisture measurements
allowing to model effectively the within field distribution
of soil moisture and its impact on the field scale
hydrograph. These observations contributed to the current
knowledge of the impact of antecedent soil moisture spatial
variability on field scale runoff.},
keywords = {J (WoSType)},
cin = {IBG-3},
ddc = {550},
cid = {I:(DE-Juel1)IBG-3-20101118},
pnm = {Terrestrische Umwelt},
pid = {G:(DE-Juel1)FUEK407},
shelfmark = {Geosciences, Multidisciplinary / Water Resources},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000290016400018},
doi = {10.5194/hess-15-1323-2011},
url = {https://juser.fz-juelich.de/record/15987},
}