Evaluation Of Soil And Water Conservation Benefits In Northern Sand Wind Region Of China

Soil and Water Conservation of China's basic national policy of long-term adherence.Soil and Water Conservation Benefits Evaluation is an important part of the system. Is a multi-factor,multi-objective, multi-index comprehensive evaluation of system efficiency.Sandy areas of northern China is more serious in areas of soil erosion. Northern Suburb solve the evaluation of soil and water conservation benefits policy for the implementation of soil and water conservation is significant.In this paper,"Soil and Water Conservation-effective method(GB/T15774-2008) "as a guide to ecology,economics,sociology,theory,evaluation of overall benefit to regional soil and water conservation methods and indicators of the system were The analysis,in sum,"national standard"and previous theories and methods of evaluation of soil and water conservation benefits on the basis for the evaluation index system of comprehensive benefits.Overall efficiency of the system to the target layer of soil and water conservation to water diversion and soil conservation benefits, economic,social and ecological benefits of conservation benefits for the rule layer evaluation system contains a total of 20 indicators.The use of scoring,level of analysis,matrix method and other comprehensive evaluation method,select the typical area of Wuwei City,Gansu Province as the research object Liangzhou specific case studies.Analysis and local realities are close to the building that is more reasonable evaluation index system,evaluation method is feasible and can be applied to soil and water conservation in North Suburb benefit evaluation.Evaluation showed that the five-year period 2004-2008 Soil and Water Conservation Liangzhou over all efficiency has improved significantly compared to 1991-1995,but there is still much to be desired.Ecological benefits of which decreased,are worsening. Sandstorm area north can be seen already very fragile ecological environment,so in economic development,focusing on social benefits transfer should also significantly improve the soil and water conservation and soil conservation benefits and ecological benefits,has reached to further enhance comprehensive benefits.