Assessing soil loss using GIS based RUSLE methodology. Case of the Bou Namoussa watershed – North-East of Algeria
| Autor: | Hamza Bouguerra, Oussama Derdous, Mohamed Redha Menani, Chemss Eddine Bouhadeb |
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| Rok vydání: | 2018 |
| Předmět: |
Environmental Engineering
Watershed siltation 0208 environmental biotechnology Geography Planning and Development lcsh:River lake and water-supply engineering (General) 02 engineering and technology North east Development Spatial distribution 03 medical and health sciences 0302 clinical medicine Bou Namoussa watershed RUSLE Water Science and Technology Hydrology lcsh:TC401-506 soil erosion business.industry 030206 dentistry GIS Agricultural and Biological Sciences (miscellaneous) Siltation 020801 environmental engineering Universal Soil Loss Equation Landscape architecture Erosion business Soil conservation |
| Zdroj: | Journal of Water and Land Development, Vol 36, Iss 1, Pp 27-35 (2018) |
| ISSN: | 2083-4535 |
| DOI: | 10.2478/jwld-2018-0003 |
| Popis: | This study aims to estimating annual soil erosion rate and its spatial distribution in the Bou Namoussa water-shed located in the North-East of Algeria by applying the revised universal soil loss equation (RUSLE) within a Geographical Information System environment (GIS). The application of the RUSLE model in different natural environments and on every scale takes into account five key factors namely: the rainfall erosivity, the soil erodibility, the steepness and length of slopes, the vegetation cover and the conservation support practices. Each of these factors was generated in GIS as a raster layer, their combination, resulted in the development of a soil loss map indicating an average erosion rate of 7.8 t·ha−1·y−1. The obtained soil loss map was classified into four erosion severity classes; low, moderate, high and very high severity representing respectively 40, 30.48, 22.59 and 6.89% of the total surface. The areas, showing moderate, high and very high erosion rates which represent more than half of the basin area were found generally located in regions having high erodibility soils, steep slopes and low vegetation cover. These areas should be considered as priorities in future erosion control programs in order to decrease the siltation rate in the Cheffia reservoir. |
| Databáze: | OpenAIRE |
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