Quantitative Study of Soil Erosion in Henan Province Based on GIS
Based on a large number of researches, in according with the actual situation in geography and geology environment in Henan Province, this paper summed up the evaluation methods of soil erosion for Henan. Based on RUSLE mode, first of all, soil erosion model needed to get rainfall erosivity factor, soil erodibility factor, terrain factor, vegetation cover and soil and water conservation measures factor. Henan soil erosion intensity distribution was obtained according to soil erosion prediction formula In the Raster Calculator module of ARCGIS. Then to be Henan soil erosion strength grade distribution according to sl190-96 classification standard. Results show that low-level is the main soil erosion level. High-level, ultra-high-level and acute also happen, but their percentages are relative low. The high-level, ultra-high-level and acute soil erosion distribute mainly in southland region. The soil erosion situation would become clear, and provide a scientific reference for the government decision-making and provides a theoretical basis for future research.
J. L. Li et al., "Quantitative Study of Soil Erosion in Henan Province Based on GIS", Key Engineering Materials, Vol. 500, pp. 136-141, 2012