Abstract : Study region: The Upper Rhine-Meuse catchment (French part). Study focus: A rainfall input-related sensitivity analysis was conducted to assess if, with a neighbor catchment-based knowledge of optimal rainfall input, rainfall-runoff modeling becomes more competitive for estimating streamflow at ungauged catchments. New hydrological insights for the region: Results show that when streamflow is known at the outlet of a catchment, optimal rainfall input for a lumped catchment model is mostly computed with a subset of raingages. When streamflow is unkown at the outlet of a catchment, a regionalisation approach of model parameter values based on spatial proximity is not able to take advantage of a neighbor-catchment based knowledge of optimal rainfall input. This report encourages to search for a catchment model regionalization approach based on spatial proximity which makes no explicit use of measured rainfall to estimate streamflow at an ungauged location.
Gilles Drogue, Wiem Ben Khediri. Catchment model regionalization approach based on spatial proximity: Does a neighbor catchment-based rainfall input strengthen the method?. Journal of Hydrology: Regional Studies, Elsevier, 2016, 8, pp.26-42. ⟨10.1016/j.ejrh.2016.07.002⟩. ⟨hal-03665930⟩