Predicting subgrid variability of soil water content from basic soil information
Predicting subgrid variability of soil water content from basic soil information
复制标题
从基本土壤信息预测土壤含水量的亚网格变异性
DOI:
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发表时间:
2015
期刊:
影响因子:
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通讯作者:
H. Vereecken
中科院分区:
文献类型:
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作者:
W. Qu;H. Bogena;J. Huisman;J. Vanderborght;Max Schuh;E. Priesack;H. Vereecken
Knowledge of unresolved soil water content variability within model grid cells (i.e., subgrid variability) is important for accurate predictions 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()) using stochastic analysis of 1‐D unsaturated 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(). The closed‐form expression was used to predict σθ() for eight data sets with varying soil texture using VGM parameters obtained from pedotransfer functions that rely on available soil information. Generally, there was good agreement between observed and predicted σθ() despite the obvious simplifications that were used to derive the closed‐form expression. Furthermore, the novel closed‐form expression was successfully used to inversely estimate the variability of hydraulic properties from observed σθ() data.
影响因子:
4.9
作者:
K. Schneider;U. Leopold;Friederike Gerschlauer;F. Barthold;M. Giese;M. Steffens;C. Hoffmann;H. Fred
通讯作者:
K. Schneider;U. Leopold;Friederike Gerschlauer;F. Barthold;M. Giese;M. Steffens;C. Hoffmann;H. Fred
影响因子:
2.7
作者:
Schneider, K.;Huisman, J. A.;Frede, H. -G.
通讯作者:
Frede, H. -G.
影响因子:
5.4
作者:
Rosenbaum;H.R. Bogena;M. Herbst;J.A. Huisman;T.J. Peterson;A. Weuthen;A.W. Western;H. Vereecken
通讯作者:
H. Vereecken