摘要
基于水动力数值模拟方法,选择广州市花都区新街河流域作为研究区域,设计洪水计算分为天然和城市两类下垫面来考虑。采用MIKE11构建一维河道水动力模型,MIKE Urban构建管网水流模型,MIKE FLOOD耦合一维水动力模型与管网水流模型,推求新街河流域不同河道断面处的典型频率设计洪水。将耦合模型计算的设计洪水成果与传统水文分析方法计算的设计洪水成果进行对比,分析考虑了城市管网后流域洪水计算发生的变化;根据研究结果,对比综合单位线法和城市洪水耦合模型两种方法的计算结果,整体来说耦合模型计算的设计洪水成果偏大,符合一般地区城市化后洪水过程洪峰增大的变化规律;部分河涌耦合模型的设计洪水成果偏小,与径流在复杂的城市管网中的流动滞时、管径过流能力不足等原因有关。
Based on the hydrodynamic numerical simulation method,the Xinjie River Basin in Huadu District,Guangzhou City is selected as the research area,and the design flood calculation is divided into natural and urban underlying surfaces in this paper.Using MIKE11 to construct one-dimensional river hydrodynamic model,MIKE Urban to construct pipe network flow model,MIKE FLOOD coupling one-dimensional hydrodynamic model and pipe network flow model,the coupling model is applied to the urban design flood simulation of Xinjiehe area.The typical frequency design flood at different river sections in Xinjiehe area is deduced.The design flood results calculated by the coupled model are compared with the design flood results calculated by the traditional hydrological analysis method,and the changes of the basin flood calculation after the urban pipeline network are analyzed.Comparing the calculation results of the combined unit line method and the urban flood coupling model,as a whole,the design flood results of coupled model calculation are larger,in line with the general area after urbanization design flood increased.However,for some rivers,the design flood result of coupling model is smaller than that of integrated unit line method,it may be related to the delay caused by the flow of rainfall runoff in complex urban pipe networks and the insufficient overcurrent capacity in small pipe diameters.
作者
王盼
程龙
蒲博文
郭上渲
歧雅菲
WANG Pan;CHENG Long;PU Bowen;GUO Shangxuan;QI Yafei(Power China Northwest Engineering Corporation Limited,Xi’an 710065,China)
出处
《水电与抽水蓄能》
2024年第4期14-19,共6页
Hydropower and Pumped Storage
基金
国家自然科学基金黄河自然科学基金黄河水科学研究联合基金项目“黄河上游水资源演变对水光风储多能互补影响”(U2243232)
中国电力建设股份有限公司“揭榜挂帅”核心技术攻关项目“流域梯级‘水风光储’一体化关键技术”(DJ-HXGG-2022-01)。
