福州城市排污规划布局的水环境影响研究

以闽江下游福州城区段为研究区间,分析了闽江下游福州段的水环境质量现状,采用二维水动力-水质耦合模型研究了枯水期城市排污口布局和排污强度规划对水环境质量的影响。研究结果表明,感潮河段排污存在明显的污染物上溯现象,在东南区水厂至马尾水厂备用水源地之间形成高浓度污染团,洋里和连坂排污口对东南区水厂水源地水质影响最为显著,高潮时刻的高锰酸盐指数增量将达1.0mg/L,氨氮增量将达约0.15mg/L,叠加本底值后水质已接近Ⅲ类标准限值。建议逐步将取水口向城市上游淮安段转移,更换取消东南区水厂的取水口。

Study on Water Environmental Impact for Layout of Urban Pollution Discharge in Fuzhou

The paper analyzes the water environmental quality in Fuzhou zone of lower reaches of Minjiang River by taking Fuzhou zone of lower reaches of Minjiang River as a research section, and sees an impact on the water environmental quality in accordance with the city pollution discharge arrangement and the intensity of pollution discharge during the low water period by applying a model study on twain dimension water dynamics-water quality coupling. The research result shows that high concentration pollution exists in the area of water source between the Southeast water plant and Mawei water plant, causing an obvious impact on water environmental quality in the area of water source of the Southeast water plant, the index increment of permanganate will reach at 1.0mg/L and increment of ammonia nitrogen will reach at 0.15mg/L during the tidemark, and the water quality after background value will be close to Ill kind criterion limit value. It is suggested that the water gap should be transferred to the higher reaches of the Huaian River and the water gap in Southeast water plant should be replaced or abolished.