【摘要】 为了合理选择大型水库分层取水措施并进行下泄水温对生态环境的影响评估,采用MIKE3数学模型方法,模拟某高坝大库分别采用单层进水口、两层进水口、叠梁门多层取水等3种不同电站取水方案的水库水温结构及下泄水温,对比分析不同分层取水措施对下泄水温的调节作用和对下游生态环境的影响。结果表明分层取水措施能有效提高水库泄水温度,减缓水库下泄低温水的影响;叠梁门结构能够实现表层取水,对水库低温水的改善效果要优于多层进水口结构。更多还原

【Abstract】 In order to setect the reasonable seheme for drawing layered water in a large reservoir and to assess the effect of the temperature of discharged water on the downstream riverine ecosystem , a water temperature model was established by using MIKE3 to simulate the water temperature structure in a large reservoir and the released water temperature downstream the dam. The impacts of three different alterative withdrawal schemes including single-layer entry , multi-layer entry and using stop logs were studied. The results show that the predicted thermal stratification and water temperature profiles in the reservoir are noticeably affected by withdrawal schemes. The optimal withdrawal schemes can effectively raise the released water temperature , so that mitigate the ecological effects. Stop logs schemes can release the surface layer water , its effect on moderation water temperature is better than that of multi-layer entry schemes.更多还原