Application of HEC-RAS Model in Water Surface Profile Calculation of River Management Engineering
In order to master the characteristics of rainstorm flood in mountainous rivers with complex flow patterns,this paper uses HEC-RAS software to build an iterative water surface profile analysis model,taking Dabukou Village section of Wushangwan River as an example.It combines the characteristic values of the watershed and the design flood results to simulate and obtain the water surface profile data of the river under the condition of a 10-year flood before and after the control section treatment.The analysis results indicate that before the treatment,the sand fields on the riverbed beach encroached on the flood discharge section,causing the water level of the riverbed to rise.After measures such as compensating for the expansion of the main river channel and protecting the bank with concrete retaining walls,the flow velocity of the river channel has decreased and the flood discharge capacity has increased.HEC-RAS software has strong applicability for hydrological and hydraulic calculations of complex flow states in natural river channels,and the calculated data is reasonable and reliable.
flood discharge cross-sectiondesign floodwater surface profileHEC-RAS model
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