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Article Dans Une Revue Journal of Hydrology Année : 2004

The role of soil in the generation of urban runoff: development and evaluation of a 2D model

Résumé

A two-dimensional numerical model is developed to determine the role of soil in the formation of urban catchment runoff. The model is based on a modeling unit, called the Urban Hydrological Element (UHE), which corresponds to the cross-section of an urban cadastral parcel. Water flow in the soil of a UHE is explicitly simulated with a finite element code for solving the Richards' equation. Two runoff components, dependent on soil behavior, are represented: runoff from natural surfaces and drainage of groundwater into the rainwater network. In an initial case study, the model is applied to a 4.7-ha suburban catchment. Simulated and observed runoff and soil water pressure heads show reasonable agreement. Soil appears to play a significant role in the formation of runoff at the scale of the small catchment under examination: its contribution represents an average of 14% of the total per-event runoff volume. Soil contribution is particularly important during rainfall events characterized by a shallow water table level, which explains a determinant part of the seasonal trend of catchment response.

Mots clés

Domaines

Hydrologie

Dates et versions

hal-02342877 , version 1 (01-11-2019)

Identifiants

Citer

E. Berthier, H. Andrieu, J. D. Creutin. The role of soil in the generation of urban runoff: development and evaluation of a 2D model. Journal of Hydrology, 2004, Urban Hydrology, 299 (3), pp.252--266. ⟨10.1016/j.jhydrol.2004.08.008⟩. ⟨hal-02342877⟩
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