二维非恒定流模型在大辽河河道现状行洪能力分析中的应用

Application of 2-Dimensional Unsteady Flow Model in Analysis on Current Flood Discharge Capacity of Daliaohe River

对于水流形态复杂、河道弯曲的感潮河段,利用非结构网格,可较好地模拟出河道内的复杂地形,计算并分析河段的现状行洪能力。本文以大辽河为例,在建模过程中考虑上游不同河段来流与下游潮位的影响;使用河道实测横断面,参考设计资料,结合实际洪水确定计算模型参数。研究成果可为河流上游水库群调度提供决策支持。

For tidal reach having complex flow patterns and curved channel, the unstructured grid can be used to simulate complex terrain in the river channel, calculate and analyze current flood discharge capacity of the river channel. This paper takes Daliaohe River as an example and considers influence of incoming flow from different upstream reaches and downstream tide level on the modeling process; parameters for model calculation are determined by using the measured cross-section, by reference to design date, in light of actual flood. The study results can provide decision-making support for scheduling of the upstream reservoir group.