HEC-RAS模型在分汊河道设计最低通航水位推求中的应用  

Application of HEC-RAS model in calculating design lowest navigable water level of braided rivers

作　　者：杨雯 陈婷婷 孙利敏 YANG Wen;CHEN Ting-ting;SUN Li-min(Sichuan Communication Surveying&Design Institute Co.,Ltd.,Chengdu 610017,China)

机构地区：[1]四川省交通勘察设计研究院有限公司,四川成都610017

出　　处：《水运工程》2023年第S01期91-94,155,共5页Port & Waterway Engineering

摘　　要：HEC-RAS一维数学模型可用于恒定流和非恒定流计算,常被应用于降雨径流、河流水动力、洪水过程分析等领域。以岷江航道(乐山段)灾后重建为例,根据河道实测地形,实测分流比以及实测水边线,采用HEC-RAS模型对该段河道水面线进行率定与分析计算,研究HEC-RAS模型在分汊河段设计最低通航水位推求中的适用性。结果表明:HEC-RAS模型在研究区率定结果良好,有较好的适用性,且能为分汊河道的航道整治提供经济有效的技术支撑。HEC-RAS one-dimensional mathematic model can be applied to the calculation of constant flow and unsteady flow. It is often used in the fields of rainfall runoff analysis, river hydrodynamic, flood process analysis and so on. Taking the post disaster reconstruction of the Minjiang river channel(Leshan section) as an example, we use HEC-RAS model calibrate to analyze and calculate the water surface line of this section according to the measured terrain, measured diversion ratio and measured water boundary line of the river channel, and study the applicability of HEC-RAS model in the calculation of the design minimum navigable water level of the braided river section. The results show that the HEC-RAS model has good calibration results in the study area, has good applicability, and can provide economic and effective technical support for channel regulation of braided rivers.

关 键 词：分汊河道 灾后重建 航道整治 HEC-RAS模型 

分 类 号：U617[交通运输工程—船舶及航道工程]