草海流域土壤侵蚀特征研究

应用地理信息系统软件的空间分析功能,从土壤侵蚀空间分布特征和流域平均土壤侵蚀模数的角度对草海流域土壤侵蚀现状进行了分析,并提出了水土保持建议.研究表明:草海流域土壤侵蚀面积占流域总面积30.58％,以轻度侵蚀为主,草海流域平均土壤侵蚀模数为870t/km2·a,属于轻度侵蚀地区,中度以上侵蚀主要分布在西南部、东部、南部...

Study on the Soil Erosion Characters in the Caohai Watershed

Based on the application of at Caohai Watershed from the view of Geographic Information System technology, erosion space distribution features and it is analyzed the soil erosion status average soil erosion modulus, and raised the soil conservation suggestions. The study shows that the soil erosion area in Caohai watershed accounts for 30.58% of the total watershed area, mainly the mild erosion. The average soil erosion modulus is 870t/km2 · a, be- longing to mild erosion areas, while the moderate or severe erosion areas are distributed in the southwest, the east or south of watershed. From the view of the relation between soil erosion and slope grades, the soil erosion area at grade III has the highest percentage, while the largest average erosion modulus is grade VI of 3 232t/km2 · a; the erosion at grade II has the maximum amount. From the view centage of soil erosion largest average erosion the maximum. area of ladder ground, cash modulus is waste grassland of the relation between soil erosion and current land use, the per- fruit trees land and the land difficult to use is the maximum, and the largest average erosion modulus is waste grassland of 4 273t/km2· a , the erosion amount of sloping farmland reaches the maximum.