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Cartography of environmental vulnerability to soil erosion of the urban area of Brazzaville using Geographic Information System (GIS)

Author Affiliations

  • 1Departement of Geology, Faculty of Sciences, University Marien Ngouabi, P.O. Box 69, Brazzaville-CONGO
  • 2 Departement of Physic, Faculty of Sciences, University Marien Ngouabi, P.O. Box 69, Brazzaville-CONGO

Int. Res. J. Environment Sci., Volume 3, Issue (5), Pages 35-43, May,22 (2014)

Abstract

Urban areas are recognized as important regions by their fragilities and dynamic. The study area is located in the Brazzaville city and it is well known by strong anthropogenic action on it. This research has generated maps of natural and environmental vulnerabilities to soil erosion from base maps of soils, slope, occupation and land use. From these maps it is possible to recognize sensible areas from environmental problems, by allowing recommendation toward best advantage for control and environmental management. The maps elaboration aims to show the intensity and the distribution of vulnerability, mainly considering the stability related to topographic and soil aspects. The methodology consists of a logical integration and processing of different available data to create a georeferenced database in Arcgis 9.3.1 program. This computer program allows an efficient analysis of different information layers taking into account the vulnerability of each environmental elements submit to analysis.

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