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http://dx.doi.org/10.12652/Ksce.2011.31.6B.515

Verification of Two Dimensional Hydrodynamic Model Using Velocity Data from Aerial Photo Analysis  

Seo, Il Won (서울대학교 공과대학 건설환경공학부)
Kim, Sung Eun (서울대학교 건설환경공학부)
Minoura, Yasuhisa (동경공업대학교 환경과학기술공학부)
Ishikawa, Tadaharu (동경공업대학교 환경과학기술공학부)
Publication Information
KSCE Journal of Civil and Environmental Engineering Research / v.31, no.6B, 2011 , pp. 515-522 More about this Journal
Abstract
The hydrodynamic models are widely used in the research for analysis of flow characteristics and design of hydraulic structure and river channel. These models need to be calibrated with observed data. But, there are few field data of two-dimensional flow velocity in flood because the direct measurement of the flood flow velocity are very dangerous. For this reason the results of two-dimensional numerical models are usually calibrated and verified with only a few observed data. Moreover, the verification of numerical models for the design flood is usually carried out using the result of one-dimensional model, HEC-RAS. In this study, using the flow velocity profile extracted from the aerial photos of a flood of the Tone River in Japan, two-dimensional numerical models, RAM2 in RAMS, RMA2 in SMS, and one-dimensional numerical model, HEC-RAS which are most widely used in research and design work are verified and the validity for verification of two-dimensional models with HEC-RAS is reviewed. The results showed that the water surface elevation of HEC-RAS, RAM2 and RMA2 models have similar results with observed data. But, the velocity results of RAM2 and RMA2 models in the floodplain have some difference with the velocity from aerial photo analysis. And the velocity result of HEC-RAS has big difference with the sectional averaged value of velocity from aerial photo analysis.
Keywords
hydrodynamic model; flood flow; aerial photo; velocity vector; RAMS; SMS; HEC-RAS;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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