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从天台祥和溪等5条小流域水土流失现状分析和水土流失综合治理措施出发,通过对坡改梯、水保林、经济林和小型水土保持工程的投入和效益分析,论证了水土流失综合治理的基础效益、生态效益和经济效益;同时通过对项目进行国民经济评价,经济内部收益率(EIRR)、经济净现值(ENPV)和效益费用比(EPCR)3项指标均达到要求。
Based on the analysis of soil and water loss and comprehensive control measures of soil and water loss in five small watersheds such as Tiantai and Hexi, through the input and benefit analysis of slope alteration, water conservation forest, economic forest and small soil and water conservation project, the comprehensive control of soil and water loss Basic benefit, ecological benefit and economic benefit. At the same time, through the national economic evaluation of the project, the three indexes of economic internal rate of return (EIRR), economic net present value (ENPV) and benefit cost ratio (EPCR) meet the requirements.