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@ARTICLE{Graf:171809,
author = {Graf, Alexander and Bogena, Heye and Drüe, Clemens and
Hardelauf, Horst and Pütz, Thomas and Heinemann, Günther
and Vereecken, Harry},
title = {{S}patiotemporal relations between water budget components
and soil water content in a forested tributary catchment},
journal = {Water resources research},
volume = {50},
number = {6},
issn = {0043-1397},
address = {Washington, DC},
publisher = {AGU},
reportid = {FZJ-2014-05371},
pages = {4837 - 4857},
year = {2014},
abstract = {We examined 3 years of measured daily values of all major
water budget components (precipitation P, potential
evapotranspiration PET, actual evapotranspiration ET, and
runoff R) and volumetric soil water content θ of a small,
forested catchment located in the west of Germany. The
spatial distribution of θ was determined from a wireless
sensor network of 109 points with 3 measurement depths each;
ET was calculated from eddy covariance tower measurements.
The water budget was dominantly energy-limited, with ET
amounting to approximately 90 $\%$ of PET, and a runoff
ratio R/P of 56 $\%.$ P, ET and R closed the long-term water
budget with a residual of $2\%$ of precipitation. On the
daily timescale, the residual of the water budget was larger
than on the annual timescale, and explained to a moderate
extent by θ (R² = 0.40). Wavelet analysis revealed
sub-weekly timescales, presumably dominated by unaccounted
fast-turnover storage terms such as interception, as a major
source of uncertainty in water balance closure. At weekly
resolution, soil water content explained more than half (R²
= 0.62) of the residual. By means of combined empirical
orthogonal function and cluster analysis, two slightly
different spatial patterns of θ could be identified that
were associated with mean θ values below and above 0.35
cm³/cm³, respectively. The timing of these patterns as
well as the varying coherence between PET, ET and soil water
content responded to changes in water availability,
including a moderate response to the European drought in
spring 2011.},
cin = {IBG-3},
ddc = {550},
cid = {I:(DE-Juel1)IBG-3-20101118},
pnm = {TERENO - Terrestrial Environmental Observatories
(TERENO-2008) / 246 - Modelling and Monitoring Terrestrial
Systems: Methods and Technologies (POF2-246) / 255 -
Terrestrial Systems: From Observation to Prediction
(POF3-255) / DFG project 15232683 - TRR 32: Muster und
Strukturen in Boden-Pflanzen-Atmosphären-Systemen:
Erfassung, Modellierung und Datenassimilation (15232683)},
pid = {G:(DE-HGF)TERENO-2008 / G:(DE-HGF)POF2-246 /
G:(DE-HGF)POF3-255 / G:(GEPRIS)15232683},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000340430400017},
doi = {10.1002/2013WR014516},
url = {https://juser.fz-juelich.de/record/171809},
}