水质预测模式在环境质量监测中的应用研究

Application of Water Quality Prediction Model in Environmental Quality Monitoring

综述了宁夏石嘴山市环境监测站运用环境影响评价技术导则中水质预测模式对黄河石嘴山段水质进行分析预测,结果表明:在石嘴山黄河大桥断面处,化学需氧量与氨氮稀释混合后浓度为20.61 mg/L和1.042 mg/L;在宁钢浮桥断面处,化学需氧量浓度值稀释混合后达标;在宁钢浮桥断面上游1 km处氨氮浓度值经稀释混合达标。化学需氧量与氨氮的断面平均浓度经稀释混合后达到Ⅲ类水质的最远距离分别位于"三排、五排"汇合后入黄口断面下游9 080 m和7 960 m处。

An analysis and forecast were made of the water quality of the Yellow River section of Shizuishan using the water quality prediction model in ＂the technical guidelines for environmental impact assessment＂ by the Environment Monitoring Station of Shizuishan Municipality. The result shows that at the Shizuishan Yellow River Bridge section the concentrations of chemical oxygen demand and ammonia nitrogen were 20.61 mg/L and 1.042 mg/L respectively after dilution and mixing. At Ninggang floating bridge section the concentrations of chemical oxygen demand met the standard after dilution and mixing At 1 km upper reaches of Ninggang floating bridge section the concentrations of ammonia nitrogen met the standard after dilution and mixing. The farthest distance at which the sectional average concentrations of chemical oxygen demand and ammonia nitrogen met class llI water quality standard after dilution and mixing were at 9 080 m and 7 960 m lower reaches of the Yellow River section where the third and fifth drainage ditch merging into the Yellow River.