TY  - JOUR
AU  - Han, Xujun
AU  - Hendricks-Franssen, Harrie-Jan
AU  - Jiménez Bello, Miguel Ángel
AU  - Rosolem, Rafael
AU  - Bogena, Heye
AU  - Alzamora, Fernando Martínez
AU  - Chanzy, André
AU  - Vereecken, Harry
TI  - Simultaneous soil moisture and properties estimation for a drip irrigated field by assimilating cosmic-ray neutron intensity
JO  - Journal of hydrology
VL  - 539
SN  - 0022-1694
CY  - Amsterdam [u.a.]
PB  - Elsevier
M1  - FZJ-2016-06179
SP  - 611 - 624
PY  - 2016
AB  - Neutron intensity measured by the aboveground cosmic-ray neutron intensity probe (CRP) allows estimating soil moisture content at the field scale. In this work, synthetic neutron intensities were used to remove the bias of simulated soil moisture content or update soil hydraulic properties (together with soil moisture) in the Community Land Model (CLM) using the Local Ensemble Transform Kalman Filter. The cosmic-ray forward model COSMIC was used as the non-linear measurement operator which maps between neutron intensity and soil moisture. The novel aspect of this work is that synthetically measured neutron intensity was used for real time updating of soil states and soil properties (or soil moisture bias) and posterior use for the real time scheduling of irrigation (data assimilation based real-time control approach). Uncertainty of model forcing and soil properties (sand fraction, clay fraction and organic matter density) were considered in the ensemble predictions of the soil moisture profiles. Horizontal and vertical weighting of soil moisture was introduced in the data assimilation in order to handle the scale mismatch between the cosmic-ray footprint and the CLM grid cel
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000378953700047
DO  - DOI:10.1016/j.jhydrol.2016.05.050
UR  - https://juser.fz-juelich.de/record/820915
ER  -