摘要
为改善太湖区域和武澄锡虞河网的水环境,特别是无锡城区、梅梁湖和五里湖,开展了利用引水调控措施来改善太湖流域区域性水环境的调水方案研究.通过多种调水方案的比较,确定了示范工程的调水方案.由于调水工程的复杂性,存在诸多不确定性因素,给引水调控措施改善区域水环境的最终效果带来一定风险.就梅梁湖而言,受调水影响,存在直湖港、武进港污水在梅梁湖内发生滞留或向其它地方转移的风险.本文借助二维水流水质数学模型,在对多种影响因素进行方案组合并进行改善效果数值模拟的基础上,通过敏感性分析,筛选出了关键风险因子——风向和风速.根据示范调水期间主导风况的实际情况,分析了梅梁湖内污水滞留位置和转移路线.结果表明,在偏北风和静风两种风况下,直湖港和武进港污水在梅梁湖内滞留和向大太湖转移的风险较大,并给出了相应的对策和建议.
In order to improve water environment of Taihu Lake area and the nearby river net, especially in Wuxi City, Meiliang Bay and Wuli Lake, risk assessment and emergency measure analysis of water diversion tests are made. Based on comparison of various water diversion schemes, the water diversion test plan is chosen. Due to the complexity and effect of various uncertain factors of water diversion projects, the effect of water diversion measures on improvement of water environment has certain risk. The polluted water from Zhihugang River and Wujingang River may stay in Meiliang Bay or transfer to other water area as a result of water diversion. By use of 2D water flow mathematical model, numerical simulation is conducted of various schemes and the improvement effectiveness under various factors is assessed. The key factors, that is, wind direction and wind velocity are selected through sensitivity analysis. According to the practical situation of prevailing wind condition during the test water diversion period, analysis is made on the detention position and transfer path of sewage in Meiliang Bay. The results show that under the conditions of north wind and calm wind, risk is relatively large, that is, sewage from Zhihugang River and Wujingang River will stay in Meiliang Bay and transfer towards Taihu Lake. Countermeasures and suggestions are also put forward.
出处
《水利水运工程学报》
CSCD
北大核心
2009年第2期1-8,共8页
Hydro-Science and Engineering
基金
水利部现代科技创新项目(XDS2007-08)
国家水体污染控制与治理科技重大专项(2008ZX07101-008-03
2008ZX07101-014-01)
关键词
太湖
数值模拟
风险分析
引水调控
梅梁湖
Taihu Lake
numerical simulation
risk analysis
water diversion measures
Meiliang Bay
