Spatial variability of conductivity as applied to distributed parameter infiltration models

Two infiltration models, called VVSIM (variable variance stochastic infiltration model) and EVVSIM (enhanced variable variance stochastic infiltration model), are developed in this study. A distributed parameter infiltration model can estimate the amount of infiltration over a field area by computin...

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Bibliographic Details
Published in:Journal of the American Water Resources Association 1998-06, Vol.34 (3), p.545-558
Main Authors: Shin, Daehyok, Lee, Kang-Kun, Kim, Jung-Wk
Format: Article
Language:English
Online Access:Get full text
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Summary:Two infiltration models, called VVSIM (variable variance stochastic infiltration model) and EVVSIM (enhanced variable variance stochastic infiltration model), are developed in this study. A distributed parameter infiltration model can estimate the amount of infiltration over a field area by computing the infiltration over zones of the field area. Hydraulic conductivity is the most important parameter determining infiltration in simulations by infiltration models. The performance of an infiltration model depends on how well the model accommodates the complicated spatial distribution of hydraulic conductivity. The two proposed models include the effects of spatial correlation of the conductivity distribution. Virtual conductivity fields are generated using the turning bands method. Monte Carlo simulations show that the proposed models give infiltration estimates more accurate than those obtained by the other models employed.
ISSN:1093-474X
DOI:10.1111/j.1752-1688.1998.tb00953.x