基于一、二维耦合模型的某湿地公园水网规划与水力优化应用

River Networks Planning and Hydrodynamic Optimization for A Wetland Park Based on 1D-2D Coupled Model

湿地水网规划和设计需要考虑防洪排涝、生物栖息地构建及水资源调度等多个因素的协调,单一维度的数值模型难以解决河网、湖区及工程调度等多种模拟对象的尺度协调问题。针对某感潮河网区域生态湿地公园的规划设计,利用MIKE Flood软件,构建一、二维耦合水动力模型,就河网规模、堰顶高程控制、生物栖息地构建等目标开展计算分析,通过方案比选确定相关工程规模,并通过区域微地形调整对鱼类和禽类栖息地水动力条件进行优化,使其满足生境构建要求。该结果不仅为相关设计单位提供了工作思路,所采用的建模方法和参数选取也可为类似项目参考。

The planning and design of wetland water network need to consider the safety of flood control and drainage,biological habitat construction and water resources allocation.The single-dimensional numerical model is difficult to solve the scale problem of various simulation objects such as river network,lake area and engineering operation.In this paper,the MIKE Flood software is used to construct a 1 D-2 Dcoupled hydrodynamic model for a wetland located in tidal river network region.The scale of river network,elevation control of weir top and biological habitat construction were calculated and analyzed.Through the comparison of the schemes,the relevant project scale is determined,and the hydrodynamic conditions of fish and poultry habitats are optimized through regional micro-topography adjustment to meet the habitat construction requirements.This example provides ideas for the related design companies.The modeling methods and parameter selection can be referenced by the similar projects.