HEC-RAS二维恒定流与非恒定流模型在洪水淹没计算中的敏感性比较分析  

Sensitivity comparison of two-dimensional steady and unsteady flow models in HEC-RAS for flood inundation calculation

作　　者：尚云飞 徐珠珠 SHANG Yunfei;XU Zhuzhu(Franzero Water Technology(Guangzhou)Co.,Ltd.,Guangzhou 510663,China)

机构地区：[1]广州丰泽源水利科技有限公司,广州510663

出　　处：《计算机应用文摘》2024年第20期168-170,共3页

摘　　要：以广州市派潭河的某河段数据为例,文章利用HEC-RAS建立了二维河道水动力模型,并对模型在恒定流与非恒定流工况下的洪水淹没计算结果进行了敏感性比较分析。结果表明,恒定流模拟的计算结果淹没程度更加严重,且随着重现期增加,恒定流与非恒定流模拟的计算结果淹没程度的差异逐渐变大。Taking the data of a certain section of the Paitan River in Guangzhou as an example,this article uses HEC-RAS to establish a two-dimensional hydrodynamic model of the river channel,and compares and analyzes the sensitivity of the model̓s flood inundation calculation results under constant and non constant flow conditions.The results indicate that the submergence degree is more severe in the calculation results of constant flow simulation,and the difference in submergence degree between the calculation results of constant flow and non constant flow simulation gradually increases with the increase of recurrence interval.

关 键 词：HEC-RAS 恒定流 非恒定流 二维水动力模型 洪水淹没计算 敏感性比较 

分 类 号：TV122[水利工程—水文学及水资源]