Exploitation de l'imagerie pleiades en cartographie reactive suite a des catastrophes naturelles ayant affecte le territoire Français en 2013

Abstract

Within the Thematic User Commissioning for the VHR Pléiades valorization, imagery was tasked in emergency following disaster events or user-exercise at the request of French Ministries (Ministry of the Environment, Ministry of Finance). These activities were also aimed at familiarizing French institutional users with the use of space technologies within crisis event management. One long term objective would be to set up a national capacity for these users, outside of the International Charter 'Space and Major Disasters' and Copernicus scope which did not support all the needs of the French Ministries. In March and May 2013, in coordination with CNES, SERTIT, SCHAPI, IGN and CEREMA, some Pléiades data have been tasked and processed in rush mode for the case of the Agly, Yonne and Marne 2013 flood events. In June 2013, two new rapid mapping actions have been carried out by CNES and SERTIT. The first one, liaising with the SCHAPI and the Rhin Sarre Flood Forecast Service (DREAL Alsace) for the Sarre river flooding, and the second one in coordination with the French State reinsurance company (Caisse Centrale de Réassurance) over the Gave de Pau floods. Finally, in February 2013, the exercise "SEISME 13" was performed at the request of the crisis center of the Ministry of the Environment (SG/SDSIE/CMVOA). Regarding user's needs, the objectives concerned water surface detection, dyke breaks, affected built features. In the case of rapid floods as Agly and Gave de Pau events, images analysis also included the recognition of residual flood water surfaces, mud deposits and current flows. In addition, the Agly case mapping got the benefits to flood mapping that can be derived from a Pléiades stereoscopic pair. For "SEISME 13" Exercise, the value added products took into account the specific needs expressed by the Ministries of the Environment, Transport and Health (damages to infrastructure, network, and building).