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| Economic loss of soil erosion and optimal model of input-output for the soil erosion control: A case study of Meng Mountain in Mingshan County |
| Xia Jianguo,Hu Cui,Liu Yun,Wu Deyong |
| College of Resources and Environment,Sichuan Agricultural University,625014,Ya'an,Sichuan,China |
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Abstract Based on the principles and methods of environmental economics,the economic losses of soil erosion of Meng Mountain was analysed and estimated.The results showed that the direct economic losses of soil erosion was 169.01 million yuan,it was 50.01% of the industrial GDP.Among different land use types,the economic losses of soil erosion in forestland and sloping farmland were most serious in the studied area,accounting for 48.91% and 27.20% of total direct economic loss of soil erosion,respectively.Then,in this paper,the dynamic difference equation of macro-total of income and waste material and harmful results, in the course of soil erosion control was built up,and the optimal model,based on the structure of input-output chart of the environment-economy system and input-output chart of the soil erosion control was derived.
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Received: 08 March 2007
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