EPA Science Inventory

AN ANALYTICAL SOLUTION TO RICHARDS' EQUATIONS FOR A DRAINING SOIL PROFILE

Citation:

Warrick, A. W., D. O. Lomen, AND A. Islas. AN ANALYTICAL SOLUTION TO RICHARDS' EQUATIONS FOR A DRAINING SOIL PROFILE. WATER SOURCES RESEARCH 26(2):253-258, (1990).

Description:

Analytical solutions are developed for the Richards' equation following the analysis of Broadbridge and White. Included here is the solution for drainage and redistribution of a partially or deeply wetted profile. Additionally, infiltration for various initial conditions is examined as well as evaporation at the upper boundary. In all cases the surface flux is constant, whether it be zero for drainage, positive for infiltration, or negative for evaporation. The solutions assume specific forms for the soil water diffusivity and hydraulic conductivity functions: a(b − θ)−2 and β + γ(b − θ) + λ/[2(b − θ)], respectively. Here θ is the water content and a, b, β, γ, and λ are constants.

Purpose/Objective:

Information.

URLs/Downloads:

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Record Details:

Record Type: DOCUMENT (JOURNAL/PEER REVIEWED JOURNAL)
Start Date: 10/10/1990
Completion Date: 10/10/1990
Record Last Revised: 03/20/2009
Record Created: 12/08/2004
Record Released: 04/02/2005
OMB Category: Other
Record ID: 128774

Organization:

U.S. ENVIRONMENTAL PROTECTION AGENCY

OFFICE OF RESEARCH AND DEVELOPMENT

NATIONAL RISK MANAGEMENT RESEARCH LABORATORY

SUBSURFACE PROTECTION AND REMEDIATION DIVISION

SUBSURFACE REMEDIATION BRANCH