基于Mike 21和HEC-RAS的河道水面线计算  

River water surface profile calculation based on Mike 21 and HEC-RAS

作　　者：李晓冰 LI Xiaobing(Hebei Institute of Investigation&Design of Water Conservancy&Hydropower Group Limited,Tianjin 300220,China)

机构地区：[1]河北省水利水电勘测设计研究院集团有限公司,天津300220

出　　处：《水科学与工程技术》2024年第5期29-31,共3页Water Sciences and Engineering Technology

摘　　要：河道水面线计算是河道整治工程设计中重要一环,直接影响河道治理的规模、投资等。采用Mike 21和HECRAS水力模型计算河道水面线,并进行分析比较,为计算方法选取提供参考依据。结果表明:两种方法计算存在差值,差值较大部分主要集中在流速较大处,分析产生差值较大原因是拐弯的中间地带流态相对不稳定,流速较大,造成水位波动。根据两种软件地形数据提取、导入的差异,分析得出Mike 21适用于地形地势较复杂、起伏不定的河道,HECRAS适用于地形较平顺、断面型式及宽度变化不大的河道。The calculation of the river channel water surface profile is an important part in the design of river channel regulastion projects,which directly affects the scale and investment of river management.Mike 21 and HEC-RAS calculation models are used to calculate the water surface profile,analysis and comparison are carried out to provide reference for the selection of calculation methods.The results indicate that there is a difference in the calculation between the two methods,and the larger difference is mainly concentrated in areas with higher flow velocity.The reason for the large difference is that the flow state in the middle zone of the bend is relatively unstable,with high flow velocity,causing water level fluctuations.Based on the differences in topography data extraction and import between two software,it is analyzed that Mike21 is suitable for rivers with complex and fluctuating topography,while HEC-RAS is suitable for rivers with smooth topography and little variation in cross-sectional shape and width.

关 键 词：Mike 21 HEC-RAS 河道 水面线 

分 类 号：TV133[水利工程—水力学及河流动力学]