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@ARTICLE{Li:865504,
author = {Li, Dazhi and Schrön, Martin and Köhli, Markus and
Bogena, Heye and Weimar, Jannis and Jiménez Bello, Miguel
Angel and Han, Xujun and Martínez Gimeno, Maria Amparo and
Zacharias, Steffen and Vereecken, Harry and
Hendricks-Franssen, Harrie-Jan},
title = {{C}an {D}rip {I}rrigation be {S}cheduled with
{C}osmic-{R}ay {N}eutron {S}ensing?},
journal = {Vadose zone journal},
volume = {18},
number = {1},
issn = {1539-1663},
address = {Alexandria, Va.},
publisher = {GeoScienceWorld},
reportid = {FZJ-2019-04907},
pages = {},
year = {2019},
abstract = {Irrigation is essential for maintaining food production in
water-scarce regions. The irrigation need depends on the
water content of the soil, which we measured with the novel
technique of cosmic-ray neutron sensing (CRNS). The
potential of the CRNS technique for drip irrigation
scheduling was explored in this study for the Picassent site
near Valencia, Spain. To support the experimental evidence,
the neutron transport simulation URANOS was used to simulate
the effect of drip irrigation on the neutron counts. The
overall soil water content (SWC) in the CRNS footprint was
characterized with a root mean square error <0.03 cm3/cm3,
but the experimental dataset indicated methodological
limitations to detect drip water input. Both experimental
data and simulation results suggest that the large-area
neutron response to drip irrigation is insignificant in our
specific case using a standard CRNS probe. Because of the
small area of irrigated patches and short irrigation time,
the limited SWC changes due to drip irrigation were not
visible from the measured neutron intensity changes. Our
study shows that CRNS modeling can be used to assess the
suitability of the CRNS technique for certain applications.
While the standard CRNS probe was not able to detect
small-scale drip irrigation patterns, the method might be
applicable for larger irrigated areas, in drier regions, and
for longer and more intense irrigation periods. Since
statistical noise is the main limitation of the CRNS
measurement, the capability of the instrument could be
improved in future studies by larger and more efficient
neutron detectors.},
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:000488985900001},
doi = {10.2136/vzj2019.05.0053},
url = {https://juser.fz-juelich.de/record/865504},
}