摘要
基于修正后的通用土壤流失方程(RUSLE)和GIS空间分析法,定量分析重庆市市域和县域尺度土壤侵蚀特征,结果表明:①重庆市土壤侵蚀面积81019.79 km^(2),土壤侵蚀总量20052.48万t/a,年平均土壤侵蚀模数2475.01 t/(km^(2)·a);微度侵蚀面积占比最大,其次是轻度侵蚀和中度侵蚀。②酉阳、奉节、巫溪、彭水等区(县)侵蚀面积较大,分别为5009.11、4030.92、3972.35和3838.89 km^(2),各区(县)微度和轻度流失面积比例最大,均超过56%。③土地利用类型以林地为主,其次是旱地,林地和旱地侵蚀面积占比分别为40.56%和31.98%;水域、建设用地和未利用地三者以微度侵蚀为主,林地、旱地和水田是重庆市侵蚀产沙主要来源。研究结果可为重庆市开展水土保持工作提供参考。
The paper quantitatively analyzed the characteristics of soil erosion at the city and county scale in Chongqing based on the modified RUSLE and GIS spatial analysis method.The outcomes show that a)the soil erosion area in Chongqing is 81019.79 km^(2),the total soil erosion is 200524800 t/a and the annual average soil erosion modulus is 2475.01 t/(km^(2)·a).The most areas are minor eroded followed by slight erosion and moderate erosion;b)the erosion area of Youyang,Fengjie,Wuxi and Pengshui is larger,as 5009.11,4030.92,3972.35 and 3838.89 km^(2)respectively.Except Yuzhong District,the proportion of minor and light loss areas is the largest and they are all more than 56%and;c)the land use type is mainly forest land,followed by dry land.The erosion area of forest land and dry land accounts for 40.56%and 31.98%respectively.Water area,construction land and unused land are mainly minor eroded,and forest land,dry land and paddy field are the main sources of erosion and sediment yield in Chongqing.The research results can provide references for soil and water loss control and soil and water conservation planning in Chongqing.
作者
高泗强
刘琪
罗歆
GAO Siqiang;LIU Qi;LUO BeijingXin(Linmiao Ecological Environment Technology Co.,Ltd.,Beijing 100085,China;Agriculture and Rural Committee of Shapingba District,Chongqing 400030,China)
出处
《中国水土保持》
2022年第11期32-36,I0005,共6页
Soil and Water Conservation in China
