Apports des données météorologiques radars et au sol à l'étude des événements pluviométriques extrêmes du Piémont (Italie)

Predicting the spatial and temporal evolution of extreme events requires accurate measurements of rainfall. Focusing on the Piedmont plain and hills zone, a characterization of rainfall’s distribution in the area was carried out and extreme events and their thresholds were identified. To analyze these events, we used two weather radars and a dense network composed by 211 rain gauges belonging to two different monitoring networks, by comparing the radar observations with ground measurements. In order to reduce uncertainties and errors between the two data types, we have applied on radar data a correction based on a spatialization of gauges information, allowing us to reconstruct the precipitation field with good accuracy.