Cartographie quantitative de l’érosion des sols par approche SIG/RUSLE dans la Commune de Karangasso vigué (Burkina Faso)

Abstract

The deterioration of climatic conditions has caused a massive influx of people from the north to the west of Burkina Faso, creating new agricultural pioneer fronts. This population growth is compounded by inadequate agricultural production systems that have led to vegetation degradation and increased water erosion in this part of the country. The objective of this study is to map the main explanatory parameters of water erosion in order to establish an erosion risk map in the commune of Karangasso Vigué. The methodology is based on modelling based on the integration of the main factors of water erosion into a geographic information system. The results obtained highlight the erosive impact of each factor and establish a hierarchy of the water erosion risk areas of the study site. The resulting map shows land loss values from 0 to 1.57 t/ha/year over an area of 187196.54 ha and from 8.42 to 36.35 t/ha/year over an area of 362.11 ha. This map is a decision-making tool for local authorities and agro-sylvo-pastoral development projects to guide the various water and soil conservation intervention actions.