高度城镇化流域广东省综合单位线应用研究  

Research on the application of comprehensive unit lines in highly urbanized watersheds in Guangdong Province

作　　者：姚丽娟 薛冰贤 吴辉明 YAO Lijuan;XUE Bingxian;WU Huiming(Guanlan River Basin Management Center,Shenzhen 518000,Guangdong,China;The Pearl River Water Conservancy Commission the Pearl River River Water Conservancy Research Institute,Guangzhou 510610,Guangdong,China)

机构地区：[1]深圳市观澜河流域管理中心,广东深圳518000 [2]珠江水利委员会珠江水利科学研究院,广东广州510610

出　　处：《水利发展研究》2024年第12期108-114,共7页Water Resources Development Research

摘　　要：为解决城镇化快速发展背景下广东省综合单位线计算流域洪水精度低下问题,以深圳市观澜河流域为研究对象,通过分析现有单位线参数对于流域洪水计算的适用性,结合多场典型降雨条件下流域洪水汇流过程特点,提出单位线参数修正方式,基于河道水动力模型,对洪水计算结果进行检验。结果表明:(1)观澜河流域实测洪水峰现时间在2 h以内,而采用现有单位线法计算洪水流量偏小,峰现时间为5 h,不能准确反应流域洪水汇流特征;(2)修正汇流参数m1后,洪水流量增大,峰现时间提前,重要断面处模拟与实测水位绝对误差小于0.05 m,峰现时间一致,洪水计算结果合理,修正后单位线可靠性更高。研究成果具有较好的应用价值,可为高度城镇化流域洪水分析研究提供参考。In order to solve the problem of low accuracy in comprehensive unit line calculation of watershed floods in Guangdong Province under the background of rapid urbanization,taking Guanlan River Basin in Shenzhen as the research object,this articleproposeda unit line parameter correction methodby analyzing the applicability of existing unit line parameters for watershed flood calculation and combining with the characteristics of watershed flood convergence process under multiple typical rainfall conditions.Based on the river hydrodynamic model,it further teststhe flood calculation results.The results show that:(1)The measured peak time of floods in the Guanlan River Basin is within 2 hours,while the current unit line method for calculating flood flow is relatively small,with a peak time of 5 hours,which cannot accurately reflect the characteristics of flood confluence in the basin;(2)After adjusting the convergence parameter m 1,the flood flow rate increased and the peak occurrence time advanced.The absolute error between the simulated and measured water levels at important sections was less than 0.05 m,and the peak occurrence time was consistent.The flood calculation results were reasonable,and the reliability of the revised unit line was higher.The research results have significant application value and can provide reference for flood analysis and research in highly urbanized watersheds.

关 键 词：高度城镇化 广东省综合单位线 参数修正 观澜河流域 

分 类 号：TU998.4[建筑科学—市政工程]