In this internship the Ardèche catchment, which is a large mountainous French catchment (2,355 km^2) and found in south-eastern France, is modelled through the use of a distributed physically based hydrological model known as J2000. The model performance is evaluated, as well as an initial sensitivity analysis is completed.
Assessment of the hydrological functioning of the Ardèche catchment using a distributed hydrological modelling approach
Hydrological modelling can be a useful tool to enhance the understanding of the hydrological processes contributing to high impact events, such as flash flooding. In this study, the distributed hydrological model J2000, is set-up and employed to model the Ardèche catchment in southern France. The Ardèche is a large (~2,300 km^2) mountainous catchment, characterized by a Mediterranean climate with high intensity precipitation events.
Model simulations are done on the catchment, in addition to five sub-catchments found in the Ardèche. The model performance is evaluated at both scales. The model also provides the relative contribution of the different flow components to total runoff. By exploring these components at both the catchment and sub-catchment scale, the dominating hydrological processes can be inferred. Furthermore, an initial sensitivity analysis is completed in an effort to improve model simulations compared to discharge observations.