广东茂名市防洪能力提升思路探讨——以“2022.7”小东江流域特大暴雨洪水为例  

Discussion on improving flood control capability of Maoming City of Guangdong Province——Taking the "2022.7" extremely heavy rainstorm flood in Xiaodongjiang Basin as an example

作　　者：高帅领 刘达[1,2,3,4] 刘霞 谭超 罗志发[1,2,3,4] 董柏良 GAO Shuailing;LIU Da;LIU Xia;TAN Chao;LUO Zhifa;DONG Boliang(Guangdong Research Institute of Water Resources and Hydropower,Guangzhou 510610;Guangdong Key Laboratory of Hydrodynamics Research,Guangzhou 510610;State and Local Joint Engineering Laboratory of Estuarine Hydraulic Technology,Guangzhou 510610;Guangdong Provincial Science and Technology Collaborative Innovation Center for Water Safety,Guangzhou 510610)

机构地区：[1]广东省水利水电科学研究院,广州510610 [2]广东省水动力学应用研究重点实验室,广州510610 [3]河口水利技术国家地方联合工程实验室,广州510610 [4]广东省水安全科技协同创新中心,广州510610

出　　处：《中国防汛抗旱》2024年第10期102-106,共5页China Flood & Drought Management

基　　金：广东省水利科技创新项目(202201);广东省科技创新战略专项资金科研项目(gdsky2023-02)。

摘　　要：广东茂名市现状防洪标准较低,受限于城市发展现状,城区堤防达标建设存在难度。提出将小东江和好心湖进行水系连通,构建小东江及根子河河网一维水动力模型,采用2022年7月洪水数据对模型进行率定,研究利用好心湖蓄洪对小东江茂名市城区段水位的影响。结果表明,当小东江上游车角山水位站发生和小东江支流长山园水位站“2022.7”暴雨洪水过程及量级相同的超50年一遇洪峰流量的洪水时,若好心湖初始水位取死水位13.74 m、闸门宽度取10~100 m,则小东江茂名市城区段峰值水位可降低0~0.03 m,闸门最大进口流量为1.6~13 m^(3)/s;若好心湖初始水位分别取11.74 m和9.74 m、闸门宽度取10~50 m,则小东江茂名市区段峰值水位可分别降低0.10~0.39 m和0.24~0.94 m,闸门最大进口流量分别为41.5~152.2 m^(3)/s和103.8~339.2 m^(3)/s。基于此,好心湖和小东江水系连通时的闸门宽度取20~30 m为宜,研究结果可为茂名市防洪能力提升提供参考。The current flood control standard of Maoming City of Guangdong Province is relatively low.Limited by the current situation of city development,it is difficult to meet the designed flood standard in the construction of urban embankments.This article proposed to link the Xiaodongjiang River and Haoxin Lake,and built a one-dimensional hydrodynamic model of the river network of Xiaodongjiang River and Genzi River.The model was calibrated using the flood data in July 2022,and the impact of using Haoxin Lake for flood storage on the water level of the Maoming urban section of Xiaodongjiang River was studied.Research shown that:when Chejiaoshan Station in the upper reaches of Xiaodongjiang River experienced a flood with a peak flow of over 50 years return period,which was the same process and magnitude as the "2022.7" flood at Changshanyuan Station in the tributary of Xiaodongjiang River,with the initial water level of Haoxin Lake setting at a dead water level of 13.744 m,and the gate width setting at 10~100 m,the peak water level of Xiaodongjiang River in the area of Maoming City was decreased by 0~0.03 m,and the maximum inlet flow of the gate was 1.6~13 m^(3)/s;with the initial water level of Haoxin Lake setting at 11.74 m and 9.74 m respectively,and the gate width setting at 10~50 m,the peak water level of Xiaodongjiang River in the area of Maoming City was decreased by 0.10~0.39 m and 0.24~0.94 m respectively,and the maximum inlet flow of the gate was41.5~152.2 m^(3)/s and 103.8~339.2 m^(3)/s respectively.It is advisable to choose a gate width of 20~30 m when linking Haoxin Lake and Xiaodongjiang River.The research results can provide reference for the improvement of flood capacity of Maoming City.

关 键 词：城市防洪 蓄洪 水动力模型 水系连通 小东江 好心湖 

分 类 号：TV87[水利工程—水利水电工程]