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Efficient method for simulating gravity-dominated water flow in unsaturated soils

Lookup NU author(s): Professor John Ewen

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Abstract

Numerical convergence difficulties associated with nonlinearity in the hydraulic property functions are often encountered when simulating gravity-dominated water flow in unsaturated soils using Richards' equation. A new approach for approximating the gravity term in Richard's equation is developed. Tests on a wide variety of soils show it is superior to existing Picard and Newton approaches. It is more reliable and efficient and allows larger time steps to be used.

Publication metadata

Author(s): Zhang X, Ewen J

Publication type: Article

Publication status: Published

Journal: Water Resources Research

Year: 2000

Volume: 36

Issue: 9

Pages: 2777-2780

Print publication date: 01/09/2000

ISSN (print): 0043-1397

ISSN (electronic): 1944-7973

Publisher: American Geophysical Union

URL: http://dx.doi.org/10.1029/2000WR900182

DOI: 10.1029/2000WR900182

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