Quels apports hydrologiques pour les modèles hydrauliques? Vers ...

X - 16LERAT ET AL.: VALUE OF UPSTREAM FLOW MEASUREMENTS2. In the UP-Meas model, five parameters are calibrated: four parameters for the RRmodel on the INT intermediate area and one for the ROUT model. The UP-Meas model270is calibrated against streamflows measured at the downstream gaging station TOTAL.3. In the UP-Sim model, we use the results of the UP-Meas model calibration for itsfive parameters, and separatly calibrate the four parameters of the RR model on the UPsubcatchment against the streamflows observed on the UP gaging station.tel-00392240, version 1 - 5 Jun 20092752802854. Database from 192 nested catchmentsThis section presents the database of 192 nested catchments used to test the modelsdescribed in section 3. Catchment locations are shown in Figure 4. This catchment section 3Figure 4set provides a robust basis for the statistical analysis of these experiments. Data wereextracted from the database gathered by Le Moine et al. [2007] (unregulated catchmentsfree from significant snow influence).Following the scheme presented in Figure 1, daily series of six variables were collected Figure 1on each catchment pair for a 10 year period from 1995 to 2005:1. Streamflow at UP and TOTAL gaging stations extracted from the French HYDROdatabase,2. Rainfall and potential evapotranpiration (PE) on upstream and intermediate areaprovided by Météo-France.Table 1 summarizes the main characteristics of this dataset: catchments are small to Table 1medium size with a mean area of 260 km 2 for the upstream catchment and 1770 km 2 forthe TOTAL catchment. The intermediate area contribution is always significant, witha mean surface ratio S UP /S T OT AL of 22%. Climatic conditions are typical of EuropeanD R A F T July 24, 2008, 3:43pm D R A F T