IAHR, founded in 1935, is a worldwide independent member-based organisation of engineers and water specialists working in fields related to the hydro-environmental sciences and their practical application. Activities range from river and maritime hydraulics to water resources development and eco-hydraulics, through to ice engineering, hydroinformatics, and hydraulic machinery.
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You are here : eLibrary : IAHR World Congress Proceedings : 35th IAHR Congress - Chengdu (2013) : THEME 5 - FLUVIAL HYDRAULICS AND RIVER MANAGEMENT : Numerical Simulation of Morphological Changes on River Confluence using Depth-Averaged 2D Model
Numerical Simulation of Morphological Changes on River Confluence using Depth-Averaged 2D Model
Author : Mohammad Rostami, Sahar Habibi and Seyed Ali Akbar Mosavi
The objective of the present paper is to investigate in detail the changes in the hydro-morpho- sedimentary processes occurring in confluence zone using a numerical model. Therefore, a depth-averaged, two-dimensional, unsteady-flow model, which is named CCHE2D, has been applied for channel confluence and bifurcation applications. In the absence of field data, experimental data for channel confluence collected in the laboratory were used to verify the simulated results. Experiments were performed by Leite Ribeiro et al. (2011) in a confluence flume where the main channel is 8.5 m long and 0.50 m wide. A 4.9 m long and 0.15 m wide tributary channel is connected at an angle of 90. Three discharge scenarios were tested. Numerical model was performed as the same geometry, flow and sediment data which used in experimental work. The simulated flow pattern and bed profile change in the confluence zone compared well with the experimental data. The numerical results showed that the maximum height of sedimentation and maximum depth of bed erosion can be predicted with about 7.3% and 16% error, respectively, by the CCHE2D model.
File Size : 736,559 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 35th IAHR Congress - Chengdu (2013)
Date Published : 18/07/2016
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