潮汐河段水库建设期水环境监测及评价——以上海青草沙水库为例

Water environmental monitoring and evaluation of reservoir in tidal reach during construction period: case of Qingcaosha Reservoir in shanghai City

青草沙水库位于感潮较强的长江口,是上海市最大的饮用水源地和保障水安全的重大基础设施。为及时反映水库建设施工期间工程范围内及周边区域水质变化情况,分别在水库施工生产区、生活区及上下游水域布点进行了水质监测。监测结果表明,水库施工生产区水域水质基本稳定;生活区水域水质较差,需要采取相应措施;总体而言,水库水质主要受上游来水水质和下游咸潮水质影响,工程施工对水库区域水质影响较小。

Qingcaosha reservoir is located at strong tidal estuary of Yangtze River and is the largest drinking water sources and important infrastructure of water safety ensuring for Shanghai city. In order to reflect water quality variation in project construction area and surrounding area, the water quality monitoring were conducted in construction area, living area, the upstream and down- stream of the reservoir. The analysis results show that the water quality in construction area is basically stable; the water quality in living area is slightly poorer, which needs corresponding measures; the water quality of the reservoir is mainly influenced by upstream flow and downstream saline tide; the influence of reservoir construction on water quality is small.