| The calculation of water surface profile is the basis for river regulation work.Theoretical study of river water surface has a certain outcome, but for the governance of a river, the main impact of a combination of factors to consider.In river regulation, Respectively on a single analysis of regulation measures on water surface is rare, this combination of flood control project of Poyang street town, an analysis of influencing factors of river water surface.This article provides an overview of the river valley and hydrological situation, according the collecting hydrological data to calculate design flow, and analysis the principles of calculation of water surface profile, select the project method of calculation of water surface.Major changes in the analysis of river channel, that is, the roughness change, bridges hole, sedimentation situation.Analysis channel roughness influencing factors, according the after regulation of the river to determine composite roughness, to calculate before and after regulation of the different roughness of the water surface profile and analysis its influence;Backwater theory expounded piers of the bridge reaming studied theoretical formula, select a reasonable calculation method reaming around the water line, analyze their impact;Elaborate on sedimentation theory to analyze the impact of siltation on the upstream section of the scope of the water line changes before and after dredging.Comprehensive analysis of its influencing factors for similar governance of the river selecting the right governance programme with reference. |
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