西三洼洪水演进数值模拟及洪水风险分析  

Flood routing numerical simulation and flood risk analysis of Xisanwa Flood Storage and Detention Area

作　　者：李大鸣[1] 罗珊[1] 范丽虹 张弘强 熊明明[3] LI Daming;LUO Shan;FAN Lihong;ZHANG Hongqiang;XIONG Mingming(State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, Tianjin 300072, China;Shaanxi Province Survey and Design Institute of Water Conservancy and Electric Power, Xi＇an 710001, Shaanxi, China;Tianjin Climate Center, Tianjin 300074, China)

机构地区：[1]天津大学水利工程仿真与安全国家重点实验室,天津300072 [2]陕西省水利电力勘测设计研究院,陕西西安710001 [3]天津市气候中心,天津300074

出　　处：《水利水电技术》2018年第8期78-86,共9页Water Resources and Hydropower Engineering

基　　金：国家自然科学基金资助项目(51079095);国家自然科学基金创新研究群体科学基金项目(51021004);天津市应用基础与前沿技术研究计划:气候变化对天津市排水规划设计标准的影响评估(15JCYBJC22300)

摘　　要：为模拟西三洼蓄滞洪区洪水演进,对其洪水风险进行分析,以一、二维非恒定流控制方程为基本理论,采用有限体积法,结合西三洼地形资料及大清河流域水文资料,建立一、二维耦合的洪水演进数学模型。采用63·8洪水实测资料对模型进行验证,结果基本吻合。对不同工况及重现期下的设计洪水进行洪水演进模拟计算并绘制洪水风险图。研究表明:该模型可模拟西三洼蓄滞洪区各分洪口门开扒时间、各时刻淹没面积、淹没水深及滞洪量等水情信息及其变化过程;规划情况(增加安全区)的滞洪总量大于现状情况滞洪总量;发生百年一遇洪水时,西三洼蓄滞洪区77%地区都遭受洪水侵害,其中57%区域为危险区,11%区域为重灾区,5%区域为中灾区。研究成果可为防汛部门制定科学合理的防洪减灾规划提供参考依据。In order to simulate the flood routing of Xisanwa Flood Storage and Detention Area,the flood risk of it is analyzed herein,and then a 1-D and 2-D coupling flood routing math-model is established in combination with both the topographic data of Xisanwa Flood Storage and Detention Area and the hydrological data of Daqinghe River Basin on the basis of the 1-D and2-D unsteady flow control equation. The model is verified with the measured data of the Flood of August 1963,from which the result is basically coincided. Moreover,the flood routing simulative calculations are made on the design floods under different operation conditions and flood recurrence periods,while the relevant flood risk maps are drawn as well. The study indicates that the model can simulate the water regime information and its changing process,i. e. the opening time of all the flood diversion openings of Xisanwa Flood Storage and Detention Area,flood inundation areas at all moments,inundated water depth,amount of flood detention,etc. The total amount of flood detention under the planned condition（ adding safety area） is larger than that under the status condition. In the event of the flood with the flood recurrence period of 100 years,77% of the flood storage and detention area is to suffer flood disaster,in which 57% is the dangerous area,11% is the area under heavy disaster and 5% is under the moderate disaster. The study result can provide a referential basis for making scientific and reasonable flood control and disaster reduction planning by the flood control sector concerned.

关 键 词：西三洼蓄滞洪区 洪水演进 一、二维耦合模型 有限体积法 

分 类 号：TV122[水利工程—水文学及水资源]