Study On Soil Erosion And Its Control Technology Of The Granite Mineral Area

The control technology of soil erosion is put forward by combining the engineering measure (mainly by overfall dam) and biological measure , after analizing kinds of forms and chareacters of soil erosion in the garnite mineral area .We carry on the research in the 97 typical mineral areas in the granite mineral area in Tiefeng mountain of Anxi county, based on the catchment unit.1 Current situation and existing problem of soil and water preserve is analized systimaticaly in the article.We set up the reasearch direction as soil erosion research and its harness in the area of granite .2 The influence of anthropogenic factor is siganificant in the soil erosion of mineral area , emboyed by its role in land feature re-mold . The re-mold land feature in the granite mineral area of Tiefeng mountain can be devided into excavated land feature and pile up land feature .3 Water erosion is the major form of soil erosion in the the granite mineral area of Tiefeng mountain , shown by the form of surface erosion and gully erosion which caused by rainfall and rainfall runoff. The erosion is maganificant as far as deepest erosion and violent erosion.4 The character of soil erosion in the granite mineral area of Tiefeng mountain is its suddenlyness , gathering , full of cobbly ,erosion violently and the large amount of waste soil and gravel etc..5 We can take measure of comprehensive practice such as engineering measure and planting measure to harness, it based on catchment unit according to the character of soil erosion in the 97 typical mineral area.6 The control result show siganificant efficiency of ecosystem performance and social performance .