Modelling the influence of landscape management practices on the hydrology of a small agricultural catchment
Modélisation de l'influence des aménagements hydro-agricoles sur l'hydrologie d'un petit bassin versant rural
Résumé
A distributed hydrological model dedicated to the assessment of the influence of the influence of landscape management practices on the hydrology a small agricultural catchments is presented. It was built using an environmental modelling framework named LIQUID. The model consists of interconnected modules representing the major hydrological processes in subsurface-drained fields, non-drained fields, hedgerows and in the hydrographic network, and uses an irregular mesh that reproduces the real shapes of the different landscape features. A model prototype was applied to the Fontaine du Theil experimental catchment (1.28 km²) in France. A six month simulation was performed in a winter period. The first results are physically consistent, in spite of limitations for simulating the seasonal variation of the discharge at the catchment outlet. Therefore we can consider that the modelling options that were chosen are promising.