Representation of space-time variability of soil moisture


Journal Article

A simplified spatial-temporal soil moisture model driven by stochastic spatial rainfall forcing is proposed. The model is mathematically tractable, and allows the spatial and temporal structure of soil moisture fields, induced by the spatial-temporal variability of rainfall and the spatial variability of vegetation, to be explored analytically. The influence of the main model parameters, reflecting the spatial scale of rain cells, the soil storage capacity, the rainfall interception and the soil water loss rate (representing evaporation and deep infiltration) is investigated. The variabilities of the spatially averaged soil moisture process, and that averaged in both space and time, are derived. The present analysis focuses on spatially uniform vegetation conditions; a follow-up paper will incorporate stochastically heterogeneous vegetation. © 2005 The Royal Society.

Full Text

Duke Authors

Cited Authors

  • Isham, V; Cox, DR; Rodríguez-Iturbe, I; Porporato, A; Manfreda, S

Published Date

  • December 8, 2005

Published In

Volume / Issue

  • 461 / 2064

Start / End Page

  • 4035 - 4055

Electronic International Standard Serial Number (EISSN)

  • 1471-2946

International Standard Serial Number (ISSN)

  • 1364-5021

Digital Object Identifier (DOI)

  • 10.1098/rspa.2005.1568

Citation Source

  • Scopus