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目的 了解通江河道混凝土护坡工程的效果与效益 ,为决策治理通江河道地区的水患与病患提供依据。方法 采用回顾性调查和专家测评的方法 ,调查通江河道地区近 5年的血吸虫病病情和水患情况及损失以及血防、水利、农业等的投入 ,结合工程设计预算 ,对工程后的血防、水利、环境和交通等效果和效益进行综合分析 ;再用净现值分析法预测工程后 1- 30年的净效益。结果 工程后相关地区的防洪标准提高了 31.0 9年一遇 ,年投入防汛人员减少 86 .76 % ,年接触疫水人数减少 5 1.6 1% ,年预防服药人数减少 5 8.37% ,年河道减少灭螺药物污染 6 4.2 9t,护坡后 5年和 10年比不进行护坡减少病人 170 3人和 40 92 5人 ;工程的年均血防效益为 435 .6 1万元 ,水利效益为2 0 6 1.89万元 ;工程后第 12年收回了全部投资费用 ,30年将产生净效益 146 47万元。结论 通江河道混凝土护坡是有利于抗灾防病、减少污染、改善环境的血防、水利、农业相结合的环保型、可持续性工程
Objective To understand the effects and benefits of concrete slope protection works in Tongjiang River and to provide basis for decision-making in flood and disease control in the area of Tongjiang River. Methods A retrospective survey and expert evaluation methods were used to investigate the condition and the incidence of schistosomiasis and the loss of schistosomiasis and the investment in blood-protection, water conservancy and agriculture in the past five years. Based on the project design budget, , Environment and traffic and other effects and benefits of a comprehensive analysis; and then use the net present value analysis to predict the project after 1-30 years of net benefits. Results Flood control standards in the relevant areas after the project increased by 31.0 years, a decrease of 86.76% in annual flood control, a decrease of 5 1.6% in annual contact with water and a reduction of 5 8.37% in the number of annual preventive medicine, Spirulina drug contamination 6 4.2 9t, 5 years and 10 years after slope protection compared with 170 3 persons and 40 92 5 without slope protection reduction; the average annual blood-protection benefit of the project is 435.61 million yuan, the water benefit is 206.689 Ten thousand yuan; the first 12 years after the project to recover the entire investment costs, 30 years will have a net benefit 146 470000 yuan. Conclusion Tongjiang River concrete slope protection is conducive to disaster prevention and disease prevention, pollution reduction, improve the environment of blood, water, agriculture, a combination of environmental protection, sustainable engineering