The One-Dimensional Model for an Open Channel Flow with Submerged Vegetation along the Channel Side

Abstract

A one-dimensional model for an open channel flow with submerged vegetation along the channel side was constructed for a natural open channel. A three-dimensional flow could be treated as a two-dimensional one by using the Manning roughness coefficient including the influence of the submerged vegetation. The energy loss was calculated by a new model using the equilibrium equations of energy as a function of the averaged velocity in each area. The averaged velocity was calculated using a velocity ratio and a continuous equation. The one-dimensional water surface profile was calculated by the law of conservation of energy using the new energy loss model. This result was compared with the experimental value and with the result obtained using a previous analysis model. It was found that the model proposed in this study coincided more closely with the experimental value than the previous analysis model.