泥浆侧排浓度扩散特性二维水沙数学模拟研究

涉水工程在施工过程中产生的高浓度泥浆排放必将污染下游河道,给下游生产、生活用水带来影响。因此准确预测高浓度泥浆排放对下游河道的影响程度及范围具有重要意义,本文以含沙水流为研究对象,采用一般曲线坐标系下的平面二维水沙数学模型对长江武汉河段过江隧道施工过程中泥浆排放对下游河道的影响进行模拟和计算。结果表明：模型能较为真实地反映不同水流条件下不同浓度的泥浆在水流中的扩散范围。可为泥浆排放口下游的生产、生活用水决策提供必要的参考依据。

Study on 2-D flow and sediment numerical model for the diffusion character of side-discharged slurry

Hyper-concentration sediment released during the construction of the near-shore projects may pollute the downstream river.So it has important environmental and engineering significance to forecast the incidence of the sediment pollution.An unsteady two-dimension(2D) horizontal mathematical model for flow and sediment in generalized curvilinear coordinate is employed to simulate the contaminated zone induced by side-discharged dense slurry in the Wuhan reach of the Yangtze River.Calculated results indicate that the model can reflect the movement of flow and sediment reasonably,and also it can provide the necessary reference for the water utilization downstream the near-shore project.