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| Mode,cost and benefit of soil and water conservation on the Loess Plateau:A case study in Gaoxigou watershed in Mizhi County |
| Jing Ke1,Jiao Juying2 |
| 1.Institute of Geographic Sciences and Natural Resources Research,Chinese Academy of Sciences,100101,Beijing;2.Institute of Soil and Water Conservation,MWR,CAS,Northwest A & F University,712100,Yangling,Shaanxi:China |
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Abstract Based on the analysis of mode,cost and benefit of collocation of soil and water loss control measures in Gaoxigou of Mizhi County in the North of Shaanxi Province,which is the typical examples of soil and water loss control in the hillygullied Loess Plateau,it's regarded that collocation mode of soil and water loss control measures should be decided by the goal of soil and water conservation, and the ecological benefit and economy benefit are different under control modes which are instructed by different goals.According to multiple,coherent-dynamic,intercrossing and mutual-dynamic characteristics of soil and water conservation benefit,assessment principle of soil and water conservation benefit is put forwarded.According to the assessment principle,the cost of control mode under the goal of food self-support is 657 000 yuan/km2,and the cost could be took back in about 5-6 years;at this moment,no sediment come form slope and no water flow out of gully,vegetation cover reach to 40%-50%,food self-supply,and annual income is 3 000 Yuan per capita.However,even after reaching to the goal of comprehensive control,the economical income is far below the countrywide average level,it's hard to entirely achieve well-off level only depending on soil and water conservation,and this is a thoughtful question to related institutions.
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Received: 10 October 2008
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