为探究引水工程对杭嘉湖平原河网城镇化地区的水质改善效果,以海宁市洛塘河圩区平原河网水系为例,针对平原河网水系流通性差与河流污染状况,通过 MIKE 11建立了洛塘河圩区河网水系的水动力水质耦合模型,提出并模拟不同引水方案,分析研究其影响机理,对不同方案的引水作用过程及其效果进行综合分析和比较.结果表明,合理选择引水地点和增加引水量对圩区水质改善作用明显,但相同情况下对初始浓度高的月份改善作用较弱;采用引水启停调度方案,短时间高流量间歇性引水,可更经济科学地使河网水质达到设计目标标准.研究结果可为平原河网区域水系综合整治提供参考依据.
Research on Precision Water Diversion Scheme for Improving Water Quality in Plain River Networks Based on Numerical Simulation
In order to explore the water quality improvement effect of water diversion projects on the urbanization area of the Hangjiahu Plain river network,taking the plain river network water system in Luotang River Weir District of Hain-ing City as an example,a hydrodynamic water quality coupling model of the plain river network water system was estab-lished using MIKE 11.Different water diversion schemes were proposed,and their impact mechanisms were analyzed.The water diversion process and effects of different schemes were comprehensively analyzed and compared.The results show that selecting a reasonable water diversion location and increasing the amount of water diversion have a significant effect on improving water quality in the polder area,but the improvement effect is weaker in months with high initial con-centrations under the same conditions;By adopting a water diversion start stop scheduling scheme and intermittent high flow water diversion in a short period of time,the water quality of the river network can be more economically and scien-tifically achieved to meet the design target standards.The research results can provide reference for the comprehensive improvement of water systems in plain river network areas.
plain river networkwater quality improvementnumerical simulationwater diversion projectoptimi-zation scheme
万方数据
维普
