感潮河段水沙数学模型研究与应用  

Research and application of flow and sediment mathematical model in tidal river

作　　者：董炳江 袁晶 

机构地区：[1]长江水利委员会水文局,湖北武汉430010

出　　处：《人民长江》2012年第1期18-21,共4页Yangtze River

基　　金：国家重点基础研究发展计划"973"项目(2012CB417001);国家自然科学基金项目(506009018)

摘　　要：感潮河段的水流和泥沙运动均具有很强的非恒定性,采用有限体积法建立了一套感潮河段平面二维水流泥沙数学模型。模型采用同位网格的SIMPLEC法对水流方程进行离散和求解,较全面地考虑了非均匀悬移质及推移质运动,具有较好的普遍适用性。以长江下游口岸直河段和仪征河段为例,分别对模型作了定床和动床计算,计算结果与实测值符合较好,从而证明了模型的可靠性。Flow and sediment movement in tidal river has strong non - constancy, so the two - dimensional flow and sediment mathematical model for tidal river is established using finite volume method. The non - staggered grids and SIMPLEC method is adopted to discrete the flow equations. The model comprehensively considers the movement of non - uniform suspended sediment and bed load with good general applicability. Taking the Yizheng and Kou^nzhi reaches in the downstream of Yangtze River for examples, the calculation is performed in the condition of fixed bed and moving bed using the above model, and the results are in good agreement with the measured values, proving the reliability of the model.

关 键 词：数学模型 泥沙冲於 长江下游 感潮河段 

分 类 号：TV142[水利工程—水力学及河流动力学]