【作者】 李占松； 丁大发；

【Author】 Li Zhansong~1 Ding Dafa~2 (1.Zhengzhou University environment and water conservation institute,Zhengzhou,henna,450002 2.Yellow River surveys the plan design limited company,Zhengzhou,henna,450003,

【机构】 郑州大学环境与水利学院； 黄河勘测规划设计有限公司；

【摘要】 首先据黄河下游决堤洪水可能波及范围内的具体情况,通过分析论证,确定了所采用的数学模型为考虑对流项的二维非恒定流基本方程,离散方法采用显隐式交替的 ADI 法,网格为交错的矩形网格,并采用自动生成技术,分三时间层进行迭代计算。利用进行初步检验后的计算模型进行了黄河南岸郑州至兰考段大堤决溢四种方案二维非恒定洪水演进的计算。第一方案和第二方案模拟了参照38年陕县站洪水过程花园口决堤洪水演进情况,与历史观测值相比较基本一致,说明计算模型可靠。第三方案和第四方案采用33年据实测推算的洪水过程进行邻近花园口及兰考黄河大堤决溢洪水演进的计算。用该模型计算了黄河北岸,黄河南岸济南以下段和黄河南岸兰考至东平湖段大堤决溢三个区域。黄河北岸包括三个方案,黄河南岸济南以下段一个方案,黄河南岸兰考至东平湖段包括两个方案。为了便于分析,还开发了地物地形、流速水深分布及变化过程线的图形直观显示程序。更多还原

【Abstract】 This article first bursts a dike according to the Yellow River downstream the flood possibly to affect in the scope the special details,Through analysis proof,Had determined uses mathematical model for considera- tion convection item of two-dimensional non-steady flow fundamental equation,The separate method uses re- veals the implicit in turn ADI law,The grid is the staggered rectangular net,And uses the automatic produc- tion technology,Divides three o’clock intercalated beds to carry on the iterative computation.Has given showing to the terrain and boundary condition processing.After carried on the preliminary examination the computation model to carry on Yellow River Nanan Zhengzhou to overflow definitely to the Lankao section main dike four kind of plan two-dimensional non-constant flood evolution computation.The first plan and the second plan simulated have referred to 38 year Shan county station flood process garden mouth to burst a dike the flood evolution situation,Compares basically with the historical observed value consistent,The ex- planation computation model is reliable.The third plan and the fourth plan use for 33 years to carry on according to the actual calculation flood process are close to the garden mouth and the Lankao Yellow River main dike overflow definitely the flood evolution computation.Divides decides the roughness co- efficient and changes the roughness coefficient two kind of situations.The computed result comparative analysis may see,The computation model to affects the flood evolution the important attribute--The roughness coefficient selection response is correct.Afterwards,Has calculated north shore Yellow Riv- er with this model,Yellow River Nanan Jinan overflows definitely by the lower segment and Yellow River Nanan Lankao to the Dongping Lake section main dike three regions.North shore Yellow River including three plans,Yellow River Nanan Jinan by a lower segment plan,Yellow River Nanan Lankao to Dongping Lake section including two plans.For ease of analysis,Also has developed the thing ter- rain,the speed of flow water depth distribution and the change process line graph visual display proce- dure,Its function has given the briefing.更多还原