基于Lattice Boltzmann方法的济南市城区暴雨洪水模型

为能够较好地模拟济南市遭遇强降雨时"南水北淹"的洪水运动特点,构建了一个既考虑淹没又考虑街巷洪水的城市雨洪模型,并在模型中的水动力学计算部分采用了Lattice Boltzmann方法。为判断模型精度,将模型的计算结果与该模型唯一控制站点小清河上黄台桥水文站的实测数据进行比较,并将重要道路上易受淹点的调查水深作为参考数据。结果表明,与实测数据和调查水深相比,该模型模拟结果较好,且由于在街巷洪水、河道汇流计算部分采用了Lattice Boltzmann方法,计算效率较传统的水动力学计算方法得到大幅提高。

Jinan Urban Rainstorm Model Based on Lattice Boltzmann Method

In order to simulate the flood movement characteristics of Jinan City during the strong rainstorm events, an urban rainstorm model is constructed by considering the inundation and the street flood. The lattice Boltzmann method is used to calculate the hydrodynamic part of the model. In order to determine the model accuracy, the calculation results are compared with the measured datum of Huangtaiqiao hydrological station in the Xiaoqinghe River. The investigation depths of submerged nodes in important roads are used as reference datum. By comparing calculated results with measured datum and investigation depth, the satisfactory simulation results are gained. Because of the lattice Boltzmann method, the calculation efficiency is improved greatly higher than the conventional numerical methods.