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Evaluation cartographique et évolution diachronique par télédétection du risque incendie de forêt. Simulation de la propagation du feu dans le bassin versant du Paillon, Nice, Alpes-Maritimes.

Abstract : Due to its climate and mountainous relief, as well as the tourism, urban and economic stakes involved, Alpes-Maritimes is the most exposed to fire risks. This thesis has sought to detect and locate risks, then assess their consequences. In order to study the environmental impacts of fires, it was necessary to determine how often and where they occur. As vast areas are involved, remote sensing by aerial or satellite photography is one of the means of understanding such large-scale phenomena. Yearly statistical were made of 30 years of fires, first over the whole department, then town by town, on the basis of the following questions: What are the causes? How often do fires occur and of what amplitude? Do weather conditions play a part in starting and spreading fires? Why was summer 2003 such a catastrophe? The use of GIS for cartographic assessment was shown to be an efficient scientific tool for examining and highlighting exposure to hazard as well as for expressing vulnerability and determining the zoning which developers, prescribers and decision makers incorporate in their overall approach to local development at various appropriate. The multiplication of classifications and PCA of a satellite picture and the FCA of the entire basin contribute considerably to understanding the phenomenon. Forest fires engender fundamental modifications of land use and zoning. A diachronic study of the evolution of the Paillon, based on 3 series of aerial photographs
and with the help of remote sensing and GIS, enabled extremely precise spatial-temporal dimensions to be determined. Studying simulations of the way fires spread can help with decision-making.
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Submitted on : Friday, April 20, 2007 - 11:24:03 AM
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Nassima Hessas. Evaluation cartographique et évolution diachronique par télédétection du risque incendie de forêt. Simulation de la propagation du feu dans le bassin versant du Paillon, Nice, Alpes-Maritimes.. Géographie. Université Joseph-Fourier - Grenoble I, 2005. Français. ⟨tel-00142644⟩

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