摘要
基于环境经济学的原理和方法,对研究区土壤侵蚀经济损失进行估算和分析。结果表明:研究区水土流失的直接经济总损失为1亿6 901万元,占同期当地第一产业总产值的50.01%,水土流失直接经济损失最严重的是林地和坡耕地;其次,根据环境经济济产出表的基本结构,得出治理土壤侵蚀投入产出表,从理论上初步探索并建立治理土壤侵蚀过程中所得收益与不利产物的宏观总量的离散差分方程,进而导出优化模型。对土壤侵蚀经济损失估算及土壤侵蚀治理投入产出优化模型的初步探讨,可评估研究区土壤侵蚀的危害程度,并对引进基于市场机制的经济管理手段,建立直接管制和经济激励相结合的政策体系,促进当地水土保持工作开展及环境与经济协调发展等提供科学指导。
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.
出处
《中国水土保持科学》
CSCD
2007年第6期76-81,共6页
Science of Soil and Water Conservation
基金
四川省教育厅青年基金项目"川西山地坡面土地利用结构及其环境演变影响研究"(2005B001)
四川农业大学青年创新基金项目"川西山地坡面土地利用对土壤侵蚀及环境演变的影响研究"(2005)
关键词
土壤侵蚀
经济损失
优化模型
最优控制
soil erosion
economic loss
optimal model
optimal control
