高坝大库分层取水措施比选研究  

Alternative withdrawal schemes for layered water in large reservoir

作　　者：张士杰[1,2] 彭文启[2] 刘昌明[1] 

机构地区：[1]北京师范大学水科学研究院,北京100875 [2]中国水利水电科学研究院水环境研究所,北京100038

出　　处：《水利学报》2012年第6期653-658,共6页Journal of Hydraulic Engineering

基　　金：国家自然科学基金资助项目(50670988);国家自然科学基金重点项目(50639070)

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。In order to setect the reasonable seheme for drawing layered water in a large reservoir and to as- sess the effect of the temperature of diseharged water on the downstream riverine ecosystem, a water temper- ature model was established by using MIKE3 to simulate the water temperature structure in a large reser- voir and the released water temperature downstream the dam. The impacts of three different aherative with- drawal schemes including single-layer entry, multi-layer entry and using stop logs were studied. The re- suits show that the predicted thermal stratification and water temperature profiles in the reservoir are notice- ably affected by withdrawal schemes. The optimal withdrawal schemes ean effectively raise the released wa- ter temperature, so that mitigate the ecological effects. Stop logs schemes can release the surface layer wa- ter, its effect on moderation water temperature is better than that of multi-layer entry schemes.

关 键 词：分层取水 水温结构 下泄水温 水温影响 

分 类 号：TV697[水利工程—水利水电工程]