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云南金沙江流域是我国水土流失最为严重的区域之一,尤其以金沙江下游区最为突出。为揭示该区域土壤侵蚀动态变化的基本规律,为今后水土保持和土地资源可持续利用提供依据,选择该区域较为典型的彝良县作为研究实例,采用航片判读、实地调查、GIS等方法编制了196 0、1980和2 0 0 0年土壤侵蚀图,据此分析该县196 0～2 0 0 0年的土壤侵蚀变化特点,并应用马尔柯夫模型预测在当前土地利用方式下土壤侵蚀动态变化趋势,为该县制定水土保持措施和土地利用规划提供了重要依据
The Jinsha River in Yunnan Province is one of the areas with the most serious soil erosion in China, especially in the lower reaches of the Jinsha River. In order to reveal the basic laws of dynamic changes of soil erosion in the region and provide the basis for the sustainable use of soil and water conservation and land resources in the future, Yiliang County, a typical area in the region, is selected as an example and compiled using aerial interpretation, field surveys and GIS The soil erosion patterns of 196 0, 1980 and 2000 were analyzed, and the characteristics of soil erosion change from 196 0 to 200 years in this county were analyzed. The Markov model was used to predict the soil erosion dynamics under current land use patterns The trend of change provides an important basis for the county to formulate soil and water conservation measures and land use planning