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Developing erosion models for integrated coastal zone management: A case study of The New Caledonia west coast

Abstrac:
The tropical climate and human pressures (mining industry, forest fires) cause significant sediment inputs into the New Caledonia lagoon and are a major cause of degradation of the fringing reefs. The erosion process is spatially characterized on the west coast of New Caledonia to assess potential sediment inputs in the marine area. This paper describes the methodologies that are used to map soil sensitivity to erosion using remote sensing and a geographic information system tool. A cognitive approach, multi-criteria evaluation model and Universal Soil Loss Equation are implemented. This article compares the relevance of each model in order to spatialize and quantify potential erosion at catchment basin scale. These types of studies provide valuable results for focusing on areas subject to erosion and serve as a decision-making tool for the minimization of lagoon vulnerability to the natural and human dynamics on the level of the catchment basins.

2010 Elsevier Ltd. All rights reserved.

Keywords:
Erosion, Multi-criteria, USLE, Geographical Information System (GIS), New Caledonia

Axe de recherche : Dynamiques, gouvernance et durabilité des territoires insulaires
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