甘肃省引洮供水工程水环境效益综合评价研究

Evaluation Method and Case Study of Water Environmental Benefit of Water Conservancy Project in Gansu Province

为揭示水利工程建设对水环境的影响程度,提高水利工程建设项目的投资决策能力,在综合考虑自然条件和社会经济等对水环境效益影响的基础上,筛选出10项与水环境效益相关的指标,基于二级模糊综合评价法构建甘肃省引洮供水工程水环境效益综合评价模型。利用熵值法确定指标权重,在考虑生态环境和工程效益重要性的情形下设计出三种准则层权重分配方案,分别进行模糊运算,结果表明:引洮供水工程水环境效益级别为“良好”,效益显著。在供水、人群健康方面的效益尤为突出。上述结果较客观地反映了引洮供水工程的水环境效益状况,验证了研究方法的有效性和评价模型的合理性,可供工程实践参考和借鉴。

To reveal the influence degree of the water conservancy project construction on water environment,this paper improves water conservancy project construction project investment decision-making,considers the natural conditions and social economic impact on the water environmental benefits on the basis of 10 water environmental benefits related indexes.Based on two-level fuzzy comprehensive evaluation method,China’s water supply project in Gansu Province comprehensive evaluation is constructed.The entropy method is used to determine the index weight,and three-criterion layer weight distribution schemes are designed by considering the importance of ecological environment and engineering benefit.The fuzzy calculation results show that the water environmental benefit level of tao water supply project is good and its benefit is significant.The benefits are particularly significant in terms of water supply and population health.The above results objectively reflect the water environmental benefits of Yintao Water Supply Project,and verify the validity of the research method and the rationality of the evaluation model,which can be used for reference in engineering practice.