Estimation of in situ hydraulic conductivity function from nonlinear filtering theory


Journal Article

A method based on an optimal nonlinear filtering technique is proposed and tested for the determination of the hydraulic conductivity function from a field drainage experiment. Simplifications to Richards's equation lead to a Langevin type differential equation to describe the redistribution of stored water as a function of drainage flux excited by a random initial condition and state forcing. The derived equation is then utilized in an optimal estimation scheme that explicitly accounts for the formulation and observation uncertainty in determining the hydraulic conductivity parameters. A field drainage experiment was carried out to study the usefulness of the proposed method for routine in situ hydraulic conductivity function estimation. Copyright 1993 by the American Geophysical Union.

Full Text

Duke Authors

Cited Authors

  • Katul, GG; Wendroth, O; Parlange, MB; Puente, CE; Folegatti, MV; Nielsen, DR

Published Date

  • January 1, 1993

Published In

Volume / Issue

  • 29 / 4

Start / End Page

  • 1063 - 1070

Electronic International Standard Serial Number (EISSN)

  • 1944-7973

International Standard Serial Number (ISSN)

  • 0043-1397

Digital Object Identifier (DOI)

  • 10.1029/92WR02593

Citation Source

  • Scopus