摘要
调水方法是改善封闭式浅水湖泊水动力条件的重要手段。以太湖流域典型封闭式浅水湖泊五里湖为实例,通过建立二维水动力数学模型,以分析引排水方式、出入流量、风场、底质条件等对湖区水动力特征的潜在影响,为优化调水方案提供技术依据。数值研究表明,引排水方式对湖区空间流态分布起主要作用,在限定引水量的条件下,由南部和东部两处节制闸同时排水有利于改善水动力条件的空间分布,避免出现局部死水区。此外,在湖区水体交换率方面,引排水出入流量起着关键作用,但风场和湖底条件也有不可忽视的影响,在实施调水管理时候应予以充分重视。
Wulihu Lake is a representative area located in Taihu Lake. In recent years, the method of water diversion has been applied to this shallow lake, for the purpose of improving hydrodynamic conditions. The influence of water diversion schemes （modes and discharges） as well as wind and bottom roughness on the flow patterns is numerically studied by using a calibrated two-dimensional hydrodynamic model. It is found that the spatial flow characteristics can be strongly affected by the water diversion modes. In parti- cular, given a design inflow discharge, the optimal outflow mode can be accomplished by simultaneously draining water from 2 out- lets located in the east and the south of the lake. On the other hand, the general hydraulic retention time is mainly determined by the total diversion discharges. However, the results also show that the effects on the hydrodynamics of the wind and bottom roughness conditions cannot be ignored in the process of water diversion.
出处
《中国农村水利水电》
北大核心
2013年第5期53-56,共4页
China Rural Water and Hydropower
基金
国家自然科学基金面上项目(41001348
51279047)
国家杰出青年科学基金项目(50925932)
关键词
调水工程
太湖
五里湖
水动力特征
water diversion project Taihu Lake
Wulihu Lake
hydrodynamic characteristics
