摘要
水库一旦遭到破坏,将给人民生活和国家地区经济建设带来巨大的损害。利用Google地球和ArcGIS提取百花滩电站上下游地形信息,基于枢纽1∶1000地形图采用HEC-RAS建立河道数值分析模型,计算分析了9种溃坝方案下溃坝洪水在下游的演进过程和影响范围,明确了沿线淹没范围和转移路线。结果表明,溃口流量取决于溃口宽度,溃坝洪水在行进过程中,随着入库洪水的持续,下游各断面洪峰流量略有下降,但幅度较小;入库洪水越大,下游各断面峰现时间越早;下游郭余社、史华村、菜园子、安宁村峰会产生一定范围的淹没。分析结果为电站安全运行和防洪应急管理提供科学依据,也可为类似闸坝工程溃坝分析提供参考。
Once the reservoir is destroyed,it will bring huge damage to people s lives and regional economic development.This paper extracts the topographic information of the upstream and downstream of Baihuatan Hydropower Station by Google Earth and Arc-GIS,establishes a numerical analysis model of the river channel through HEC-RAS based on the 1∶1000 topographic map of the hub,calculates and analyzes the evolution process and the scope of impact of dam-break flood under nine schemes,and clearly defines the submerged scope and transfer route.The results show that:The flow of the breach depends on the width of the breach.During the course of the dam-break flood,with the continuation of the flood into the reservoir,the peak flow of the downstream sections decreases slightly;The greater the flood into the reservoir is,the earlier the peak flow of downstream sections occurs;Guoyushe,Shihua Village,Caiyuanzi,and Anning Village will be flooded to a certain extent.The analysis results provide a scientific basis for the safe operation of power stations and emergency management of flood control,and a reference for the research of similar gate dam projects.
作者
蒋林杰
付成华
程馨玉
刘健
JIANG Linjie;FU Chenghua;CHENG Xinyu;LIU Jian(School of Energy and Power Engineering,Xihua University,Chengdu 610039,China)
出处
《人民珠江》
2021年第1期65-72,共8页
Pearl River
基金
四川省教育厅人文社科重点研究基地李冰研究中心项目“都江堰工程对现代水利工程的价值研究”(lbyj2018-09)。
