张峰水库(拟建)蓄水后水质污染预测

Water quality pollution prediction on Zhangfeng reservoir (planned construction) after water storage

目的为了明确拟建张峰水库蓄水后水质变化趋势,对水源地水质保护提供参考依据。方法预测了2010年和2020年水库的水质状况,选用一维稳态水质模型Streeter-Phelps模型对张峰水库主要入库河流(沁河)入库BOD5浓度进行预测,对库区BOD5浓度的预测采用完全均匀混合质量平衡水质模型,同时应用Dillon模型对张峰水库库区总磷浓度进行了计算。结果 2010年和2020年枯水期张峰水库BOD5入库背景浓度分别为2.271 mg/L和2.595 mg/L,库区BOD5浓度分别为1.100 mg/L和1.047 mg/L。平水期入库背景浓度为1.696 mg/L和1.776 mg/L,库区浓度为2.821 mg/L和2.954 mg/L。水库库区总磷浓度分别为0.001 8 mg/L和0.002 8 mg/L。结论在可预见范围内张峰水库水质良好,将处于贫营养化状态,但为了长期发展考虑,水库上游地方政府应采取相应措施加强对主要污染源生活污水的处理。

Aim To know the variation trend of water quality in Zhangfeng Reservoir after it is built and give a reference to water resource protection,the reservoir water quality between 2010 and 2020 is studied.Methods The concentration of BOD5 about Qin River this study calculated was forecasted by using the steady one-dimensional water quality model of Streeter-Phelps and the well-mixed mass balance water quality model was used in the reservoir.At the same time,the concentration of TP about Zhangfeng reservoir was calculated with Dillon model.Results In the dry season of 2010 and 2020,the concentrations of BOD5 before the reservoir are 2.271 mg/L and 2.595 mg/L while they are 1.100 mg/L and 1.047 mg/L in the reservoir.The results in the wet period are 1.696 mg/L,1.776 mg/L and 2.821 mg/L,2.954 mg/L.The concentrations of TP about Zhangfeng reservoir of 2010 are 2020 were 0.001 8 mg/L and 0.002 8 mg/L.Conclusion It is shown that the water quality of Zhangfeng reservoir is good,and it will be on the poor nutrient state.The local government should take some measure to control the major sources of pollution of sewage for the long-term development.