基于TMDL的金山湖水环境治理模拟耦合计算与实践

参照国内外水质管理的技术手段,镇江市提出了运用最大日负荷总量(TMDL)理念治理金山湖水环境的思路,以湖泊富营养化代表性指标总磷作为水质评价因子,梳理排水管网、排口及面源污染的现状,利用金山湖水环境模型耦合计算手段,科学制定总磷排放的管控方案。模拟计算得出,通过控制排口的排放流量,将排入金山湖的总磷污染负荷削减2.63 t/a,可有效实现金山湖水环境治理目标。

Simulated Coupling Calculation and Practice of Water Environment Treatment in Jinshan Lake Based on Total Maximum Daily Load

The idea of using the total maximum daily load(TMDL)to control the water environment of Jinshan Lake in Zhenjiang City was proposed by referring to the technical means of water quality management at home and abroad.The total phosphorus,a representative indicator of lake eutrophication,was proposed as a water quality evaluation index.The present situation of the pipe network,outlet and non-point source pollution was sorted out,and the control scheme of total phosphorus discharge was scientifically formulated by means of coupling calculation of Jinshan Lake water environment model.It was found that the water environmental control target of Jinshan Lake could be effectively achieved if the discharged total phosphorus load was decreased by 2.63 t per year through controlling discharge flow.