城市暴雨积涝水量动态分配有源积水扩散算法研究

Research on dynamic diffusion algorithm with source term of water volume in waterlogging

传统暴雨淹没分析算法中,给定水位下的积水淹没分析算法需要已知积涝水位,但是在实际降雨中积涝水位获取存在一定难度;已知洪水体积的积涝扩散算法虽然算法简单、计算速度快,但是未突破汇水区边界限制。针对传统淹没分析算法存在的不足,从有源扩散的角度出发,提出了一种水量动态分配的有源积水扩散算法,从而提高了暴雨积水模拟的准确性。以漳州市龙文区为例,选取了2016年6月15日的降雨进行验证,结果与实测结果基本一致。

The urban storm flood analysis is of great significance to the study of numerical simulation of urban storm waterlogging.In the traditional urban storm flood analysis algorithm,given waterlogging level is essential for urban storm flood analysis,but the waterlogging level is difficult to be obtained in real situation.The waterlogging diffusion algorithm with given water volume is simple and quick to calculate,but tlie catchment area has a boundary.To overcome these deficiencies,an active waterlogging diffusion algorithm with dynamic distribution of water volume in waterlogging is proposed from the perspective of active diffusion.This algorithm improves the accuracy of storm waterlogging simulation.Taking Longwen District of Zhangzhou City as an example,the precipitation on June 15,2016 was used to validate the algorithm.The results are consistent with themeasured results.Therefore,it can be concluded that this algorithm is effective and accurate.