Study of overland flow with uncertain infiltration using stochastic tools - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Advances in Water Resources Année : 2012

Study of overland flow with uncertain infiltration using stochastic tools

(1) , (1) , (2) , (3) , (1)
1
2
3

Résumé

The effects of spatial and temporal scales in uncertain infiltration processes are investigated within overland flow models. The saturated hydraulic conductivity is considered as the uncertain input parameter. The probabilistic model for this parameter relies on a spatial organization of the watershed into fields. In each field, the saturated hydraulic conductivity is assigned a distribution function and is assumed to be independent of those of the other fields. Four rainfall events are considered to explore various temporal scales leading to different soil saturation levels. Our results show the important impact of soil saturation on overland flow variability and the moderate impact of grass strip localization on runoff variability. Moreover, the most influential input parameter, determined by sensitivity analysis, depends on its localization in the watershed and the duration of the rainfall event. Finally, smaller probabilities of extreme discharges are observed with three grass strips instead of just one located near the field outlet.

Dates et versions

hal-00662082 , version 1 (23-01-2012)

Identifiants

Citer

Marie Rousseau, Olivier Cerdan, Alexandre Ern, Olivier Le Maitre, Pierre Sochala. Study of overland flow with uncertain infiltration using stochastic tools. Advances in Water Resources, 2012, 38, pp.1-12. ⟨10.1016/j.advwatres.2011.12.004⟩. ⟨hal-00662082⟩
119 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook Twitter LinkedIn More