[1668] - Predicting subgrid variability of soil water content from basic soil information

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Qu, W., Bogena, H., Huisman, J. A., Vanderborght, J., Schuh, M., Priesack, E., Vereecken, H., 2015. Predicting subgrid variability of soil water content from basic soil information. Geophysical Research Letters, 789 - 796. DOI: 10.1002/ 2014GL062496.
Title(s):Main Title: Predicting subgrid variability of soil water content from basic soil information
Description(s):Abstract: Knowledge of unresolved soil water content variability within model grid cells (i.e., subgrid variability) is impor tant for accurate predic tions of land-surface energy and hydrologic fluxes. Here we derived a closed-form expression to describe how soil water content variability depends on mean soil water content (σθ(<θ>)) using stochastic analysis of 1-D unsaturat ed gravitational flow based on the van Genuchten-Mualem (VGM) model. A sensitivity analysis showed that the n parameter strongly influenced both the shape and magnitude of the maximum of σθ(<θ>). The closed- form express ion was used to predict σθ(<θ>) f or eight data sets with varying soil tex ture using VGM parameters obtained from pedotransfer f unctions that rely on available soil information. Generally, there was good agreement between obser ved and predicted σθ(<θ>) despite the obvious simplifications that were used to derive the closed-form expression. Fur thermore, the novel clos ed-form expression was successfully used to inversely estimate the variability of hydraulic proper ties from obser ved σθ(<θ>) data.
Identifier(s):DOI: 10.1002/ 2014GL062496
Citation Advice:Qu, W., H. R. Bogena, J. A. Huisman, J. Vanderborght, M. Schuh, E. Priesack, and H. Vereecken (2015), Predicting subgrid variability of soil water content from basic soil information, Geophys. Res. Lett., 42, 789–796, doi:10.1002/2014GL062496.
Responsible Party
Creator(s):Author: Wie Qu
Author: Heye Bogena
Author: Johan A. Huisman
Author: Jan Vanderborght
Author: Max Schuh
Author: Erwin Priesack
Author: Harry Vereecken
Publisher:AGU Publications
TR32 Topic:Soil
Related Sub-project(s):C1
Subject(s):CRC/TR32 Keywords: Hydrological Modelling
File Details
File Name:Qu2015.pdf
Data Type:Text
File Size:495 kB (0.483 MB)
Date(s):Available: 2015-01-11
Mime Type:application/pdf
Data Format:PDF
Download Permission:Free
General Access and Use Conditions:According to the TR32DB data policy agreement.
Access Limitations:According to the TR32DB data policy agreement.
North:-no map data
Measurement Region:Germany
Measurement Location:--Germany--
Specific Informations - Publication
Article Type:Journal
Source:Geophysical Research Letters
Page Range:789 - 796
Metadata Details
Metadata Creator:Michael Stockinger
Metadata Created:2017-05-30
Metadata Last Updated:2017-05-30
Funding Phase:2
Metadata Language:English
Metadata Version:V41
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