Study On Indexes System For Assessing The Collecting And Distributing Project Benefit Of Runoff On Slope In Earth-rock Mountain Area

Water shortage and soil erosion both are important restrictive factors which affect local agricultural development and the life for people living in the mountainous areas in southern of shaanxi. And also it is a common problem in the Arid and Semi-arid Area of our country. On one hand, rural life and agricultural production are faced with serious water shortage; on the other hand, heavy soil erosion leads to the lost of runoff on surface of the ground a lot in this area. Thus, how to utilize and develope the resources of runoff on slope has become one of the most effective measures to promote economic development and improve the ecological environment in the earth-rock mountainous areas of arid and semi-arid area of our country. Meanwhile, it is also one of the focus issues concerned by the nations and regions which is short of water.Relying on the project of making use of technology on runoff on slope in the southern Shaanxi, based on consulting plenty of Chinese and foreign literature, this article analyzes the contradictions of soil erosion and drought in the dry earth-rock mountainous areas thoroughly. With water as the center, this artical also listed a completely new idea about soil and water conservation which is based on collecting runoff on slope. On that base, this article set a suit of complete disposition technique theory for the collecting and distributing runoff on slope which is suitable for local surface which has a great significance to solve practical problems in the earth-rock mountainous areas of arid and semi-arid area such as optimizing disposition technique of collecting and distributing project system for runoff on slope.At the same time, the selective methods about tank's location on slope catchment project were also discussed, and also the relevant principles and disposal modle about the location of tank were summarized. The article apllying analytical hierarchical process theory in operational research established the model of assessing the collecting and distributing runoff on slope project. After careful screening and analysis, this article established the system of assessing index system including three dominating aspects such as economic efficiency,ecological efficiency and social efficiency including a total of 11 subordinate indexes. On the basis of analyzing the relation between each index and synthetical goal, the mathematics mode of assessing synthetical efficiency was made.Finally, take the small watershed of Maligou in Baihe County as a typical,the theory advanced by the author was verified, and a number of suggestions and ideas about cellar in Baihe County were made.