L'article met en evidence le fonctionnement hydrologique des lits moyens et des lits majeurs ... more L'article met en evidence le fonctionnement hydrologique des lits moyens et des lits majeurs exceptionnels a partir des exemples de l'Ouveze et de l'Orbieu. Il s'interroge sur la remise en cause des frequences theoriques. La derniere partie est consacree au lit moyen, forme ambigue et se clot par deux hypotheses sur la genese et l'evolution des lits majeurs exceptionnels.
June 15th and 16th, 2010, heavy rainfall strikes the department of the Var and provoked numerous ... more June 15th and 16th, 2010, heavy rainfall strikes the department of the Var and provoked numerous floods,essentially concentrated on the Argens and Nartuby rivers. The ministry services decided to launch studies to know the flood extension zones. This approach allowed to obtain an envelope of the zone flooded in June, 2010. Besides, those services had studies, previous to the flood, that define envelopes of flood-risk area according to different methods such as a hydrogeomorphological approach, a geological approach, a numerical approach based on DEM interpretation (Exzeco) and the method developing for the risk prevention plan. The aim of this paper is to compare these limits of the flood-risk area and that of the 2010 flooded zone. A digital comparison method by means of the software Mapinfo allowed to highlight sectors where the limits of flood-risk areas were exceeded by the event of June, 2010. The results show that the geological mapping allows a coherent approach of the flood-...
Deux crues rares a exceptionnelles, survenues les 12-13 novembre 1999 et les 8-9 septembre 2002, ... more Deux crues rares a exceptionnelles, survenues les 12-13 novembre 1999 et les 8-9 septembre 2002, ont provoque de lourds bilans materiels (2 milliards d'euros) et humains (58 morts). Leur dimension regionale constitue l'occasion de comparer les limites des zones inondees avec celles d'une approche naturaliste des zones inondables, la cartographie hydrogeomorphologique. Les etudes realisees ont permis de satisfaire deux grands objectifs. Nous avons pu mesurer les lineaires pour lesquels la plaine alluviale fonctionnelle de chaque cours a ete, remplie, non remplie ou bien depassee. Les resultats concluent, que ce soit pour le departement de l'Aude ou du Gard, a la tres large propagation des crues dans la plaine alluviale fonctionnelle des 27 cours d'eau etudies, montrant ainsi la pertinence de l'approche hydrogeomorphologique des zones inondees. Aussi, nous avons pu verifier et analyser les causes ayant provoque les debordements des eaux sur les formes encaissan...
June 15th and 16th, 2010, heavy rainfall strikes the department of the Var and provoked numerous ... more June 15th and 16th, 2010, heavy rainfall strikes the department of the Var and provoked numerous floods, essentially concentrated on the Argens and Nartuby rivers. The ministry services decided to launch studies to know the flood extension zones. This approach allowed to obtain an envelope of the zone flooded in June 2010. Besides, those services had studies, previous to the flood, that define envelopes of flood-risk area according to different methods such as a hydrogeomorphological approach, a geological approach, a numerical approach based on DEM interpretation (Exzeco) and the method developing for the risk prevention plan. The aim of this paper is to compare these limits of the flood-risk area and that of the 2010 flooded zone. A digital comparison method by means of the software Mapinfo allowed highlighting sectors where the limits of flood-risk areas were exceeded by the event of June 2010. The results show that the geological mapping allows a coherent approach of the flood-r...
L'article met en evidence le fonctionnement hydrologique des lits moyens et des lits majeurs ... more L'article met en evidence le fonctionnement hydrologique des lits moyens et des lits majeurs exceptionnels a partir des exemples de l'Ouveze et de l'Orbieu. Il s'interroge sur la remise en cause des frequences theoriques. La derniere partie est consacree au lit moyen, forme ambigue et se clot par deux hypotheses sur la genese et l'evolution des lits majeurs exceptionnels.
June 15th and 16th, 2010, heavy rainfall strikes the department of the Var and provoked numerous ... more June 15th and 16th, 2010, heavy rainfall strikes the department of the Var and provoked numerous floods,essentially concentrated on the Argens and Nartuby rivers. The ministry services decided to launch studies to know the flood extension zones. This approach allowed to obtain an envelope of the zone flooded in June, 2010. Besides, those services had studies, previous to the flood, that define envelopes of flood-risk area according to different methods such as a hydrogeomorphological approach, a geological approach, a numerical approach based on DEM interpretation (Exzeco) and the method developing for the risk prevention plan. The aim of this paper is to compare these limits of the flood-risk area and that of the 2010 flooded zone. A digital comparison method by means of the software Mapinfo allowed to highlight sectors where the limits of flood-risk areas were exceeded by the event of June, 2010. The results show that the geological mapping allows a coherent approach of the flood-...
Deux crues rares a exceptionnelles, survenues les 12-13 novembre 1999 et les 8-9 septembre 2002, ... more Deux crues rares a exceptionnelles, survenues les 12-13 novembre 1999 et les 8-9 septembre 2002, ont provoque de lourds bilans materiels (2 milliards d'euros) et humains (58 morts). Leur dimension regionale constitue l'occasion de comparer les limites des zones inondees avec celles d'une approche naturaliste des zones inondables, la cartographie hydrogeomorphologique. Les etudes realisees ont permis de satisfaire deux grands objectifs. Nous avons pu mesurer les lineaires pour lesquels la plaine alluviale fonctionnelle de chaque cours a ete, remplie, non remplie ou bien depassee. Les resultats concluent, que ce soit pour le departement de l'Aude ou du Gard, a la tres large propagation des crues dans la plaine alluviale fonctionnelle des 27 cours d'eau etudies, montrant ainsi la pertinence de l'approche hydrogeomorphologique des zones inondees. Aussi, nous avons pu verifier et analyser les causes ayant provoque les debordements des eaux sur les formes encaissan...
June 15th and 16th, 2010, heavy rainfall strikes the department of the Var and provoked numerous ... more June 15th and 16th, 2010, heavy rainfall strikes the department of the Var and provoked numerous floods, essentially concentrated on the Argens and Nartuby rivers. The ministry services decided to launch studies to know the flood extension zones. This approach allowed to obtain an envelope of the zone flooded in June 2010. Besides, those services had studies, previous to the flood, that define envelopes of flood-risk area according to different methods such as a hydrogeomorphological approach, a geological approach, a numerical approach based on DEM interpretation (Exzeco) and the method developing for the risk prevention plan. The aim of this paper is to compare these limits of the flood-risk area and that of the 2010 flooded zone. A digital comparison method by means of the software Mapinfo allowed highlighting sectors where the limits of flood-risk areas were exceeded by the event of June 2010. The results show that the geological mapping allows a coherent approach of the flood-r...
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