Comparison of different discharge estimation methods for sharp-crested semi-circular side weir under subcritical flow regime

Abstract:
Side weir is a flow control structure that used extensively in irrigation and drainage networks and sewer networks. In this research, a study with 162 experiments has been done on sharp-crested circular side weir. Since the height of this side weir varies along its length, this feature enables it to control flood better than rectangular side weir in different flood conditions. The governing differential equation of circular side weir has no analytical solution, and thus it is necessary to use numerical methods to solve it. Since numerical methods have computation cost, normal weir equation and linear assumption of water surface profile are used to solve the problem. Lastly, by doing three other experiments under completely different conditions, it was found that the method of considering linear water surface profile has less error in comparison with other methods used in this research.
Language:
Persian
Published:
Iranian Journal of Soil and Water Research, Volume:46 Issue: 4, 2016
Pages:
663 to 671
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