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Article Dans Une Revue Hydrology and Earth System Sciences Discussions Année : 2006

Simplified stochastic soil-moisture models: a look at infiltration

Résumé

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 non-overlapping 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.
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Dates et versions

hal-00305033 , version 1 (18-06-2008)

Identifiants

  • HAL Id : hal-00305033 , version 1

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J. R. Rigby, A. Porporato. Simplified stochastic soil-moisture models: a look at infiltration. Hydrology and Earth System Sciences Discussions, 2006, 10 (6), pp.861-871. ⟨hal-00305033⟩

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