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@ARTICLE{Li:890097,
author = {Li, Wanxin and Brunner, Philip and Li, Zhi and Wang,
Zhoufeng and Zhang, Zhengyu and Wang, Wenke and
Hendricks-Franssen, Harrie-Jan},
title = {{P}otential evaporation dynamics over saturated bare soil
and an open water surface},
journal = {Journal of hydrology},
volume = {590},
issn = {0022-1694},
address = {Amsterdam [u.a.]},
publisher = {Elsevier},
reportid = {FZJ-2021-00686},
pages = {125140 -},
year = {2020},
abstract = {Actual evaporation (Ea) can be calculated as a fraction of
potential evaporation (PE), which refers to the evaporation
rate if supply water is unlimited. Potential evaporation
depends on the available energy and the underlying material,
and different approaches to estimate potential evaporation
exist nowadays. This study provides a detailed analysis of
the evaporation dynamics over fully saturated, sandy soil
(PEs) and an open water surface (PEw). Moreover, the
performance of commonly used methods to estimate PE is
assessed. At the basis of these analyses is a lysimeter
experiment in the Guanzhong Basin, China, which allowed a
precise measurement of PE with a very high temporal
resolution. Temperature profiles in lysimeters and
meteorological data were also measured during the
experiment. A comparison of PEs and PEw was carried out for
seven consecutive days (August 11th to 17th, 2016). Results
show that PEw is smaller than PEs on a daily scale, with PEw
rates being bigger than PEs at night but smaller during
daytime. Furthermore, the temporal dynamics of PEw lags
4–5 h behind PEs. In accordance with the energy balance
equation, PE dynamics are mainly governed by “available
energy”. The PE rates calculated by Penman-Monteith (PM)
and Priestly-Taylor (PT) based on these measurements were
also evaluated. The measured PE is relatively well
reproduced by PM and PT equations. Finally, the effect of
using different approaches to estimate PE on calculating Ea
was tested by an integrated hydrological model that
calculates water flow in the unsaturated zone by solving the
Richards equation. The relative differences were up to
$17.5\%.$},
cin = {IBG-3},
ddc = {690},
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:000599754500004},
doi = {10.1016/j.jhydrol.2020.125140},
url = {https://juser.fz-juelich.de/record/890097},
}