Evaluation Of Soil Erosion Sensitivity In Luanping County

Sensitivity evaluation of regional soil erosion is one of the hot issues in the field of ecological sensitivity.The sensitivity evaluation of soil erosion based on geographic information system(GIS)technology can reflect the sensitivity of soil erosion to human activities,and is helpful to identify and clarify the sensitive area of soil erosion.Luanping county belongs to Hebei province and is located in Miyun Reservoir upstream of the city of Beijing,which belongs to the water conservation important water source of Beijing and Tianjin area and Yanshan hilly water conservation ecological protection zone.Soil erosion and ecological environment in Luanping county are not only related to its land use and living environment,but also to the integration of Beijing,Tianjin and Hebei province,even the ecological sustainable development of the capital.This study is based on the basic principle of the modified universal soil loss equation(RUSLE)and the environmental characteristics of Luanping county,the evaluation factors of soil erosion sensitivity were selected as rainfall erosivity factor,soil erodibility factor,topographic relief factor and vegetation coverage factor.With the support of the spatial analysis of GIS technology,the soil erosion sensitivity to single factor was evaluated and analyzed,and the above four evaluation factors were integrated by soil erosion sensitivity index method,the spatial difference of soil erosion sensitivity and the potential mechanism of soil erosion in Luanping County in 2015 were revealed.With the support of multi factor analysis of GIS technology,the difference of soil erosion sensitivity in different land use patterns was obtained.This study shows that the erosion sensitivity erosion factor is very sensitive to the rainfall erosivity and soil erosion on soil erosion in Luanping county,the sensitivity of soil erosion to the topographic relief factor is mainly light and moderate,and the sensitivity of vegetation coverage factor is insensitive.The sensitivity of soil erosion in Luanping county was mainly sensitive to light,the proportion of total area was 52.69%,and the evaluation results were consistent with the results of the calculation of the SEPDI.Based on the above analysis,this paper provides some suggestions on the construction of ecological environment and social economic development in Luanping county.