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@ARTICLE{Tian:864347,
author = {Tian, Jie and Zhang, Baoqing and He, Chansheng and Han,
Zhibo and Bogena, Heye Reemt and Huisman, Johan Alexander},
title = {{D}ynamic response patterns of profile soil moisture
wetting events under different land covers in the
{M}ountainous area of the {H}eihe {R}iver {W}atershed,
{N}orthwest {C}hina},
journal = {Agricultural and forest meteorology},
volume = {271},
issn = {0168-1923},
address = {Amsterdam [u.a.]},
publisher = {Elsevier},
reportid = {FZJ-2019-04143},
pages = {225 - 239},
year = {2019},
abstract = {Understanding the dynamic response of soil moisture to
rainfall is critical for hydrological modelling in arid and
semi-arid basins. However, little is known about
rainfall-related soil moisture dynamics in arid
high-altitude mountainous areas due to the absence of
long-term high-resolution soil moisture observations. In
this study, we investigated the dynamic response processes
of profile soil moisture using data from a soil moisture
monitoring network in the Qilian Mountains established in
2013 covering altitudes from 2,000–5,000 m a.s.l. To
investigate the effects of different land covers on soil
moisture response, we selected data from eight soil moisture
stations with the same soil textural class and slope, but
different land covers (scrubland, meadow, high coverage
grassland (HCG), medium coverage grassland (MCG) and barren
land). Several indices were evaluated to quantitatively
describe soil moisture dynamics during the growing seasons
of 2014–2016 based on soil wetting events. In addition,
HYDRUS-1D simulations were used to further analyze the
effect of land cover on soil moisture dynamics. Our results
showed that soil moisture response amplitudes along profile
are similar under MCG and barren land, but significantly
different under scrubland, meadow and HCG. The rate of soil
moisture increment decreased significantly with depth for
all land covers, except for the HCG. The temporal pattern of
soil moisture increase was highly variable along the soil
profiles depending on land cover type. In particular, the
difference of response time between the adjacent layers
varied from negative values to 280 h with depth.
Preferential flow occurred mostly in soils covered by
scrubland. Water transferability was higher in deeply rooted
soil. Furthermore, sensitivity analysis indicated that soil
hydraulic properties are key factors in regulating profile
soil wetting events. Our results show that the soil moisture
response indices are useful to quantitatively characterize
patterns in profile soil moisture dynamics, and provide new
insights into the soil moisture profile wetting process
(e.g. occurrence of preferential flow etc.), which helps for
effective model parameterization and validation, in turn
improving hydrological modelling in arid high-altitude
mountainous areas.},
cin = {IBG-3},
ddc = {550},
cid = {I:(DE-Juel1)IBG-3-20101118},
pnm = {255 - Terrestrial Systems: From Observation to Prediction
(POF3-255)},
pid = {G:(DE-HGF)POF3-255},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000468709200022},
doi = {10.1016/j.agrformet.2019.03.006},
url = {https://juser.fz-juelich.de/record/864347},
}