摘要
针对自然流域地形地貌对地表径流滞留的影响,将流域坡面汇流概化为二维模式,采用二维运动波汇流模型计算坡面汇流,应用二维运动波隐式差分方法进行求解,结合DEM技术,基于考虑土壤水分再分配的Green-Ampt超渗产流模型,河道汇流采用一维运动波汇流,构建了基于栅格的Grid-GA-2D模型,并将其与Grid-GA及陕北模型应用于黄河支流沁河孔家坡站以上流域,探讨了模型的适用性。结果表明,3个模型均能较好地模拟水文过程,其中Grid-GA-2D模型洪峰模拟效果更好。
Due to landform influence of runoff storing in natural watershed, overland flow concentration is simplified as two-dimensional flow, which is calculated by two-dimensional implicit finite difference kinematic wave model. Based on the Oreen-Ampt runoff yield model considering the soil moisture redistribution, concentration of channel with one-dimen- sional kinematic wave is used to establish Grid-GA-2D based Grid model by combining digital elevation model （DEM） technology. The proposed model, Orid-GA model and Shanbei model are applied to the upper Kongjiapo basin in Qin Riv- er, a tributary of the Yellow River for flood simulation. The applicability of the model is discussed. The results show that three hydrologic models perform well in flood simulation, and the flood peak simulation accuracy of the proposed model is higher.
出处
《水电能源科学》
北大核心
2011年第11期6-10,54,共6页
Water Resources and Power
基金
国家自然科学基金资助项目(41105068)
