Spatial Distribution And Quantitative Analysis Of Soil Erosion In Jiaocheng County Based On RUSLE Model

In this paper,the soil erosion in Jiaocheng County of Shanxi Province is taken as the research object,and the impact factors related to soil erosion are selected,including:rainfall erosion factor(R),soil erodibility factor(K),slope length topographic factor(LS),Vegetation cover and management factor(C)and soil and water conservation measure factor(P),based on geographic information system(GIS)technology,comprehensively calculate the soil erosion characteristics of Jiaocheng County through RUSLE model,and draw each of Jiaocheng County The distribution map of impact factors,soil erosion modulus distribution map and intensity grade distribution map are intended to provide scientific reference and basis for soil erosion control and subsequent land remediation work in Jiaocheng County.The research results are as follows:(1)There are few plains in Jiaocheng County,and the mountain area accounts for 92.8%of the total land area of Jiaocheng County,mainly distributed in the northwest and central regions.The plain area accounts for 7.2%of the total land area of Jiaocheng County,mainly distributed in the southeast.The land use types in the county area are mainly forest land and grassland,accounting for 81.12%of the total area of Jiaocheng County,and the vegetation coverage is large.(2)The highest soil erosion modulus in Jiaocheng County was 4250.73 t·km-2·a-1,and the soil erosion intensity did not reach the level of strong erosion.Jiaocheng County is dominated by micro-erosion distribution,with a distribution area of 174256.24hm2,which is 95.40%of the total area of the county;the distribution of mild erosion is relatively scattered,which is 3.63%of the total area of the county;the distribution range and proportion of moderate erosion Small,is 0.97%of the total area of the county,mainly distributed in mountainous hilly areas with large slopes and low ground cover(3)The soil erosion in different townships and regions is very different.The soil erosion degree is higher in the southwest and northwest areas of the county,and the soil erosion degree is lower in each township in the southeast.(4)The spatial distribution characteristics of soil erosion are related to different land use types.The main land type of soil erosion in Jiaocheng County is agricultural cultivated land,and the higher the vegetation coverage,the weaker the soil erosion degree(5)Slope affects the spatial distribution of soil erosion.The greater the slope,the stronger the soil erosion occurs,and the two are positively correlatedBy analyzing soil erosion and related impact factors,the key to controlling soil erosion in Jiaocheng County is to strengthen soil and water conservation of cultivated land,rationally and effectively utilize natural resources,protect and improve vegetation coverage,maintain ecosystem stability,and take measures.Repair the ecological environment and so on.