薄山湖纳污能力及污染动态演化分析研究

Analysis on Pollution and Pollution Evolution of Boshan Lake

湖泊污染防治和水资源保护问题是目前生态环保区域研究的重要方向,选取薄山湖作为研究对象,通过一维河流水质模型获取湖泊功能区域纳污能力;依据物质守恒定律建立湖泊水体污染动态演化模型,为直观分析薄山湖污染演化情况,将流入湖泊污染物浓度与时间相关变化函数带入污染动态演化模型中,获取控制污染情况下湖泊的污染时间演化模型。采用该方法可准确获取薄山湖各功能区纳污能力,纳污能力计算结果表明,薄山湖纳污能力与流量呈正比,且增长速率与湖段长度成正比;不同初始污染浓度与流入污染物浓度下的薄山湖污染动态演化结果可知,初始污染浓度大于与小于污染物流入浓度,薄山湖污染浓度最终均趋于污染物流入浓度,二者变化趋势不同;控制流入薄山湖污染物浓度时,薄山湖污染浓度随时间变化而递减,直至最终薄山湖污染浓度趋于0。

The prevention and control of lake pollution and the protection of water resources are the important for ecological and environmental protection research.With Boshan Lake as the research object,the water quality model of the lake is obtained through the one-dimensional river water quality model.The dynamic evolution of lake water pollution is established according to the law of conservation of matter.The model is used to visually analyze the pollution evolution of Boshan Lake,and bring the concentration and time-dependent change function of the influx of lake into the dynamic evolution model of pollution,and obtain the pollution time evolution model of the lake under the control of pollution.The experimental results show that the method can accurately obtain the pollution capacity of each functional area of Boshan Lake.The calculation results of the pollution capacity show that the pollution capacity of Boshan Lake is proportional to the flow rate,and the growth rate is proportional to the length of the lake section;The results of the dynamic evolution of pollution in Boshan Lake under the concentration of pollutants and the concentration of influent pollutants show that the initial pollution concentration is greater than and less than the pollutant influx concentration,and the concentration of Boshan Lake pollution tends to be the pollutant influx concentration.When the concentration of pollutants flowing into Boshan Lake flows,the concentration of Boshan Lake decreases with time,until the concentration of Boshan Lake pollution tends to zero.