The floods and the Cevenol phenomenon

Résumé du document

Floods = natural disaster. Floods = hazard for human and several animals. The Mediterranean supplies water. The Cevennes block everything. Climatic situation between 8h and 15h. Formation of cloudy cells, break up in point of V, V cells aspirate everything. Most of impacts are centered in south of France. Dispersion of exogenous species. Leaching (lessivage) of garbage dumps, agricultural plastics, chemical liquid-waste, ground erosion… Limit land consolidation (stop the destruction of hedges, talus and ditches). Limit the rain streaming (keep fields under grass in winter, scatter grass between crop). A winegrower of Gard said : "On soil under grass, the rain streaming had began on the 8th September in the evening, and on soil not under grass, it had begun in the afternoon".

Extraits

[...] THE FLOODS ANDTHE CEVENOL PHENOMENON SUMMARY Introduction The scene where the floods take place The cevenol phenomenon Example : september 2002 in Gard - Situation - V storm system - Lightnings impacts - Consequences Risks prevention Conclusion Bibliography INTRODUCTION Floods = natural disaster Floods = hazard for human and several animals Several kind of floods Cevenol phenomenon THE SCENE Mainly in south east in France Near Mediterranean sea Examples: Gard Var Vaucluse . THE CEVENOL PHENOMENON It is not a new phenomenon PERIOD: End of summer / Autumn WHY? [...]

[...] Torrential rains HOW? THE CEVENOL PHENOMENON Explicative diagram THE CEVENOL PHENOMENON THE EFFECTS Imediate floods Drastic consequences Very important erosion capacity Consequences on human, fauna and flora EXAMPLE : SEPT (Gard) Situation in september 2002 Situation on 8 september 2002 Situation on 8 september V storm system Lightnings impacts Consequences Consequences Consequences Human consequences 22 deaths : 10 aged persons (stress, drowning ) 5 persons in their auto 2 uncareful persons 5 persons in holiday Economical consequences Environmental consequences Dispersion of exogenous species (jussie) Leaching (lessivage) of garbages dumps, agricols plastics, chemical liquid-waste, ground erosion Restoration of banks (berges), streams and rivers, ripisylves (woods in river) in particular. [...]