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@ARTICLE{Pfletschinger:150438,
author = {Pfletschinger, H. and Prömmel, K. and Schüth, C. and
Herbst, M. and Engelhardt, I.},
title = {{S}ensitivity of {V}adose {Z}one {W}ater {F}luxes to
{C}limate {S}hifts in {A}rid {S}ettings},
journal = {Vadose zone journal},
volume = {13},
number = {1},
issn = {1539-1663},
address = {Madison, Wis.},
publisher = {SSSA},
reportid = {FZJ-2014-00494},
pages = {1-14},
year = {2014},
abstract = {Vadose zone water fluxes in arid settings are investigated
regarding their sensitivity to hydraulic soil parameters and
meteorological data. The study is based on the inverse
modeling of highly defined soil column experiments and
subsequent scenario modeling comparing different climate
projections for a defined arid region.In arid regions,
groundwater resources are prone to depletion due to
excessive water use and little recharge potential.
Especially in sand dune areas, groundwater recharge is
highly dependent on vadose zone properties and corresponding
water fluxes. Nevertheless, vadose zone water fluxes under
arid conditions are hard to determine owing to, among other
reasons, deep vadose zones with generally low fluxes and
only sporadic high infiltration events. In this study, we
present an inverse model of infiltration experiments
accounting for variable saturated nonisothermal water fluxes
to estimate effective hydraulic and thermal parameters of
dune sands. A subsequent scenario modeling links the results
of the inverse model with projections of a global climate
model until 2100. The scenario modeling clearly showed the
high dependency of groundwater recharge on precipitation
amounts and intensities, whereas temperature increases are
only of minor importance for deep infiltration. However,
simulated precipitation rates are still affected by high
uncertainties in the response to the hydrological input data
of the climate model. Thus, higher certainty in the
prediction of precipitation pattern is a major future goal
for climate modeling to constrain future groundwater
management strategies in arid regions.},
cin = {IBG-3},
ddc = {550},
cid = {I:(DE-Juel1)IBG-3-20101118},
pnm = {246 - Modelling and Monitoring Terrestrial Systems: Methods
and Technologies (POF2-246)},
pid = {G:(DE-HGF)POF2-246},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000330971700004},
doi = {10.2136/vzj2013.02.0043},
url = {https://juser.fz-juelich.de/record/150438},
}