Land degradation mapping by remote sensing in the arid region of India

Abstract. In arid regions of India, cultivation of marginal areas and overgrazing of pastures have resulted in degradation of land. Accelerated wind erosion on sandy surfaces and water erosion on the shallow soils of piedmont areas are both common. Landsat Thematic Mapper sub‐scenes have been used to map the type, extent and degree of degradation. In an area of over 5000 km 2 , 42% was affected by wind erosion and 50% by accelerated water erosion. A quarter of the whole area needs urgent attention for soil conservation.