北海市牛尾岭水库生态修复工程实施探讨

Discussion on implementation of Niuweiling Reservoir ecological restoration project in Beihai City

北海市牛尾岭水库受禽畜水产养殖、农林面源以及农村污染等影响,水库的富营养化程度属于富营养状态,水库水质整体处于Ⅲ-Ⅳ类水质标准,主要是总氮、总磷严重超标,对北郊水厂正式启用造成较大的影响。造成北海市城市中心城区供水供需矛盾凸现,城市供水安全保障面临十分严峻的形势。提出通过水生态修复方式,通过设置前置库、人工湿地、水库消落带工程措施和非工程措施进行水质修复,并通过数据分析对其可行性进行论证。

Affected by aquaculture, poultry and livestock farming, agricultural and forestry non-point sources, and rural pollution, the eutrophication degree of Niuweiling Reservoir was eutrophic, with an overall water quality of class III-II. The total nitrogen and the total phosphorus seriously exceeded the standard, rendering significant impact on the water supply of the Beijiao Water Plant to be put into formal use. The contradiction between supply and demand of water supply is in the urban center of Beihai City has been outstanding, and the security of urban water supply is in a very severe situation. Water ecological restoration measures were proposed, including non-engineering measures and engineering measures of advance reservoir, artificial wetland and reservoir degrading belt. The feasibility was demonstrated by data analysis.