Simplified stochastic soil-moisture models: A look at infiltration

Published

Journal Article

A simplified, vertically-averaged model of soil moisture interpreted at the daily time scale and forced by a stochastic process of instantaneous rainfall events is compared with a vertically-averaged model which uses a nonoverlapping rectangular pulse rainfall model and a more physically based description of infiltration. The models are compared with respect to the importance of short time-scale (intra-storm) variable infiltration in determining the probabilistic structure of soil-moisture dynamics at the daily time-scale. Differences in approach to infiltration modelling show only minor effects on the probabilistic structure of soil-moisture dynamics as simulated in the two models. The partitioning of losses during a single rainfall event are examined closely and the conditions under which surface-controlled runoff is significant, as a proportion of total losses, are delineated.

Full Text

Duke Authors

Cited Authors

  • Rigby, JR; Porporato, A

Published Date

  • January 1, 2006

Published In

Volume / Issue

  • 10 / 6

Start / End Page

  • 861 - 871

Electronic International Standard Serial Number (EISSN)

  • 1607-7938

International Standard Serial Number (ISSN)

  • 1027-5606

Digital Object Identifier (DOI)

  • 10.5194/hess-10-861-2006

Citation Source

  • Scopus