望虞河引清调水改善太湖水环境定量分析  

QUANTITATIVE ANALYSIS ON WATER ENVIRONMENT IMPROVEMENT BY CLEAN WATER DIVERSION FROM WANGYU RIVER

作　　者：王水[1,2] 胡开明[1,2] 周家艳[1,2] 

机构地区：[1]江苏省环境科学研究院,江苏南京210036 [2]江苏省环境工程重点实验室,江苏南京210036

出　　处：《长江流域资源与环境》2014年第7期993-998,共6页Resources and Environment in the Yangtze Basin

基　　金：国家"十二五"科技重大专项(2012ZX07506-001-001)

摘　　要：以望虞河引清调水实践为背景,利用引水调水现状及实测数据,建立适合太湖的二维水量水质数学模型,并模拟计算调水前后湖体各项水质因子浓度的空间变化规律。结果显示:水利调度影响下太湖湖体中高锰酸盐指数、氨氮、和总氮的浓度大体上有所减小,改善率分别为6.0%、16.0%和9.2%,总磷稍有反弹,其指标恶化了4.4%,太湖湖体水质总体改善面积37%,主要集中在贡湖、梅梁湖及东部湖区这些引排水水流流经的区域,表明"引江济太"调水工程对改善太湖局部湖区水质、保障太湖供水安全具有重要意义,可为其他类似水域的水污染治理提供科学参考和依据。There are many rivers and lakes in China, which are widely distributed with abundant water quantity. They are the important drinking water sources for nearby towns. But rivers and lakes have the characteristics of open water. Apart from providing drinking water, they have other functions such as blowdown, shipping, irrigation, which are potential threats to water quality. In Taihu Lake Basin, the rapid population growth, the acceleration of urbanization and rapid industrial development, and the increasing demand for water generated a lot of sewage and wastewater. How to protect the lake water environment has become a focus of public concern. Understanding hydrodynamic characteristics and contaminants transport and diffusion processes in Taihu Lake is helpful for people to use water resources carrying capacity rationally, and optimize water pollution control measures. It can also provide a strong scientific and technological support for develop a reasonable plan of water resources protection and engineering decision making along the lake. Based on the practice of clean water diversion from the Wangyu River to the Taihu Lake and a large amount of investigation and monitoring data, a 2-D model of water quantity and quality in Taihu Lake was established. The hydrodynamic model preferably reflected the dynamic characteristics of the study lake region. On the impact of the flow direction, clean water transport process distribution 0I the study lake region was zonal, and distribution relied on the shore, the lower water concentration of the distance is near the outfall of the Wangyu River. The spatial variations of each water quality index concentration before and after the water diversion were obtained. The results indicated that the water diversion could improve the lake water quality. The concentrations of CODvn, NHa-N and TN were decreased by 6.0%, 16.0% and 9.2% respectively, but the concentration of TP rose by 4. 4~. The quality of 37% of the total area of the Taihu Lake was improved. These areas were concentrated

关 键 词：引江济太 二维水量水质模型 水环境 水质变化 定量分析 水污染治理 

分 类 号：X524[环境科学与工程—环境工程]