基于DELFT3D HM模型的苍海湿地公园洪水淹没模拟研究

洪水淹没情景受区域洪水流量、河床地形变化、河道工程运行调度等多因素影响,对于洪灾情景的确定,是开展河道与滩区治理研究以及进行防洪设计和滩区功能定位的前提条件。为此,以苍海湿地公园区域为例,利用Delft3D HM模型建立起二维洪水演进模型,进而模拟洪水淹没过程。模型采用P=20 a一遇洪水历史资料进行验证,结果合理;采用P=50 a一遇洪水对苍海湿地公园流域内洪水淹没过程进行了模拟,得到了实时淹没范围、最大淹没区域、水位变化过程等洪涝区内的特征水力要素信息。成果为该区域内的防洪规划和实时洪水预报提供理论参考,同样为后期洪涝区内水质提升工程提供可靠参数。

Numerical Simulation of Flood Submergence in Canghai Wetland Park Based on DELFT3D Hydrodynamic Model

Flood submergence scenario is affected by many factors such as flood discharge in the area,change of riverbed topography change and operation schedule of channel projects.The determination of flood scenario is a precondition for carrying out research on river and beach area management,as well as flood control design and beach area positioning function.In view of this,a two-dimensional flood evolution model is established by using the Delft3D Hydrodynamic model to simulate the flood submergence process in Canghai Wetland Park as a case study.The model is verified by historical data of 20-year flood and the results were reasonable.The flood routing process in Canghai Wetland Park encountering 50-year flood is simulated,and the characteristic hydraulic factors such as flooded area,maximum submerged area,and water level change process are obtained.The research achievements provide a theoretical reference for flood control planning and real-time flood forecasting in the area and offer reliable parameters for water quality improvement projects in the flood area.