Evaporation and the field scale soil water diffusivity function


Journal Article

Simplifications to the depth‐integrated soil water transport equation lead to an Ito stochastic differential equation where the evaporation is related to the stored water by the nonlinear soil water diffusivity function. From the derived equation the diffusivity function was estimated from daily stored water measurements obtained at the field scale using nonlinear filtering theory for a period of 100 days. Comparisons with daily evaporation measured with a sensitive 50‐ton lysimeter indicated that the proposed method may be used to determine soil water diffusivity functions at the field scale under natural conditions when applied water and evaporation are the primary controlling physical mechanisms in the hydrologic budget. Copyright 1993 by the American Geophysical Union.

Full Text

Duke Authors

Cited Authors

  • Parlance, MB; Katul, GG; Folegatti, MV; Nielsen, DR

Published Date

  • January 1, 1993

Published In

Volume / Issue

  • 29 / 4

Start / End Page

  • 1279 - 1286

Electronic International Standard Serial Number (EISSN)

  • 1944-7973

International Standard Serial Number (ISSN)

  • 0043-1397

Digital Object Identifier (DOI)

  • 10.1029/93WR00094

Citation Source

  • Scopus