考虑紊流效应的深度平均二维模型在澜沧江水质预测中的应用

The Application of Depth-averaged Two-dimensional Model Considering Turbulence Effect in Water Quality Prediction of Lancang River

采用可靠的水动力水质模型对水质进行预测是水污染治理的有效措施。常用的深度平均二维浅水模型因忽略了紊流项的影响,难以准确模拟水流运动,会对水质预测造成影响。鉴于此,本研究构建了考虑紊流效应的二维水动力水质模型,以南木冷河汇入澜沧江段为研究对象,分析不同排污情景下的污染物浓度变化。结果表明,构建的二维水动力水质模型在研究区域具有较好的适用性,排污口设置对水功能水质达标存在不利影响。本研究可为澜沧江水环境保护提供科学依据。

Using reliable hydrodynamic water quality model to predict water quality is an effective measure to prevent water pollution.The commonly used depth average 2D shallow water model is difficult to accurately simulate the flow movement due to ignoring the influence of turbulence,which has an impact on water quality prediction.Therefore,this paper constructed a 2D hydrodynamic and water quality model considering turbulence effect.Taking the section of nanmuleng river flowing into Lancang River as the research object,the pollutant concentration distribution under different sewage inflow scenarios is analyzed.The results show that the 2D hydrodynamic and water quality model has good applicability in the study area,and the setting of sewage outlet has an adverse effect on water quality standards,which provides scientific basis for water environmental protection of Lancang River.