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以渭河下游咸阳至北洛河河口间的一维洪水和距离咸阳断面下游136km的右岸洪泛区二维洪水为对象,进行4种洪水频率的一维和二维嵌套的非恒定流计算.对于非规则区域的二维非恒定流,采用了曲线坐标系下的有限分析法离散数值格式进行了数值模拟,针对动边界问题提出了新的数值处理格式,本部分为数值模型和计算方法的验证部分.
One-dimensional and two-dimensional nested unsteady flow calculations of four kinds of flood frequencies are carried out for one-dimensional floods in Xianyang-Beiluohe estuary and 136-km floodplain on the right bank of the lower reaches of Xianyang section. The two-dimensional unsteady flow in irregular region is simulated by discrete finite element method (FEM) in curvilinear coordinate system. A new numerical processing format is proposed for the dynamic boundary problem. This part verifies the numerical model and calculation method section.