基于二维水流模拟的湖泊型水源保护区划分方法

Delineating Water Source Protection Area Based on Two-dimensional Flow-pollutant Model

通过建立及求解二维水流水质模型,提出了基于水质模拟的湖泊型饮用水水源保护区的划分方法.以太湖贡湖流域为例,根据《饮用水水源保护区划分技术规范》(HJ/T338—2007),在研究二维水流水质模型的基础上,建立贡湖流域二维水流水质模型.将望亭立交调水情况作为重要影响因素,以高锰酸盐指数、总氮、总磷作为主要水质指标,模拟并分析贡湖湖体2010年不同调水情景模式下的水质变化.应用贡湖流域水流水质模拟结果和GIS分析方法,采用数值分析法划分贡湖水源地一、二级保护区,对贡湖饮用水水源保护区做出准确的划分,为贡湖流域的饮用水水源地保护提供切实可用的技术支持.

This paper describes the general principles and research methods of delineating source water protection areas based on the two-dimensional flow-pollutant model. Taking Gong Lake as an example, the two-dimensional flow-pollutant model of Gong Lake was first built and run according to Delineating Source Water Protection Areas （HJ/T338-- 2007）. The water transfer in Wangting hub was regarded as the main impact on water quality in Gong Lake, and the water quality indexes such as CODM~, TP and TN in different situations were analyzed in 2010. Then numerical simulation was used to delineate source water protection area on the basis of the two-dimensional flow-pollutant model and GIS method. The study results provide the technical support for delineating source water protection areas.