新沟河排水对太湖水环境影响研究  

Research on the Influence of Xingou River Drainage on the Water Environment of Taihu Lake

作　　者：陈翔 陈江海 CHEN Xiang;CHEN Jiang-hai(Shanghai Investigation,Design&Research institute,Shanghai 200434,China)

机构地区：[1]上海勘测设计研究院有限公司,上海200434

出　　处：《四川环境》2022年第1期163-168,共6页Sichuan Environment

基　　金：太湖生态水动力模拟与水环境提升技术(国家重点研发计划2016YFC0401504);中国长江三峡集团有限公司科研项目资助(202003136)。

摘　　要：太湖西北部尤其是梅梁湖水质较差,新沟河延伸拓浚工程实施后,可通过外排梅梁湖水改变太湖的水动力水质环境。利用Mike21建立太湖二维水动力水质数学模型,研究该工程实施后对太湖水动力水质的影响。研究得到:新沟河工程实施后,可有效改善梅梁湖的水动力条件,梅梁湖换水周期缩短13.3%;同时,梅梁湖CODMn、TP、TN等主要污染物浓度下降30%,太湖CODMn、TP、TN等污染物平均浓度下降10%左右;表明新沟河工程实施对太湖尤其是梅梁湖水动力水质环境具有显著改善作用。后续,可结合望虞河引水,研究新的引排格局下太湖水环境改善效果,提出最优调度策略,为太湖水环境改善提供技术支撑。The water quality in north-west of Taihu Lake especially in Meiliang Lake is rather bad,after the construction of Xingou river extension and dredging engineering,hydrodynamic characteristic and water quality of Taihu Lake can be changed by draining water from Meiliang Lake.Through construction of 2D hydrodynamic and water quality mathematical model of Taihu Lake using Mike21,the influence of the project on hydrodynamic and water quality of Taihu Lake was studied.The results showed that after the construction of Xingou river project,the hydrodynamic conditions of Meiliang Lake is improved effectively,the water age of Meiliang Lake is shorten by 13.3%.Meanwhile,the concentrations of CODMn,TP,TN and other major pollutants in Meiliang Lake decreased by 30%,and those in Taihu Lake decreased by about 10%,indicating that the construction of Xingou river project could improve the hydrodynamic characteristic and water quality of Taihu Lake especially Meiliang Lake.Furthermore,combined with the water diversion of Wangyu River,the improvement effect of water environment in Taihu Lake under the new drainage pattern can be studied,and the optimal dispatching strategy can be proposed to provide technical support for the improvement of water environment in Taihu Lake.

关 键 词：排水 太湖 水动力水质 数学模型 影响研究 

分 类 号：X524[环境科学与工程—环境工程]