摘要
为进一步对贺兰山暴雨洪水进行预报预警,基于自主研发的分布式水文模型HHmodel和二维水动力模型HH2D构建贺兰山东麓3个典型流域的洪水预报模型。分布式水文模型将流域划分为规则的网格单元计算产流过程,根据降雨条件和下垫面土壤状态变化自动切换产流方式,二维水动力模型基于DEM数据并利用三角网格对区域进行剖分,以出山口水文站的流量过程作为模型输入开展洪水淹没模拟与分析。选取2018年7月典型洪水数据,模拟暴雨洪水过程、洪峰流量和峰现时间,以及洪水出山后的漫滩过程,模型结果合理。研究成果为贺兰山东麓的洪水预报预警工作提供方法及参考案例,能够进一步为干旱半干旱地区的洪水预报预警提供参考。
To improve the forecasting and early warning capabilities for storm-induced floods in the Helan Mountain region,flood forecasting models for three typical watersheds on the eastern Helan Mountain slope were developed using the independently designed distributed hydrological model HHmodel and the two-dimensional hydrodynamic model HH2D.The distributed hydrological model divides watersheds into regular grid units to calculate runoff processes,dynamically switching runoff generation methods based on rainfall conditions and changes in soil states.The two-dimensional hydrodynamic model employs DEM data and triangulated grids to segment the region,using flow data from mountain pass hydrological stations as input for flood inundation simulations and analyses.The model’s results,validated against the storm flood event of July 2018,including peak discharge,peak timing,floodplain inundation,and the flooding process after the flood come out of the mountain,demonstrated accuracy and reliability.This research provides methodologies and case references for flood forecasting and early warning in the Helan Mountain region and offers insights for flood management in arid and semi-arid areas.
作者
李聪敏
侯爱中
陈腊娇
LI Congmin;HOU Aizhong;CHEN Lajiao(Ningxia Hui Autonomous Region Hydrological and Water Resources Monitoring and Early Warning Center,Yinchuan 750001,China;Information Center,Ministry of Water Resources,Beijing 100053,China;Aerospace Information Innovation Research Institute,Chinese Academy of Sciences,Beijing 100094,China)
出处
《水利信息化》
2024年第6期23-28,共6页
Water Resources Informatization
基金
国家重点研发计划项目(2021YFB3900601)
水利部重大科技项目(SKS-2022136)。
关键词
洪水模拟
模型构建
预报预警
洪水淹没
贺兰山东麓
flood simulation
model construction
forecast and early warning
flood inundation
eastern Helan Mountain
