Location
Virtual
Start Date
7-5-2021 12:00 AM
End Date
7-8-2021 12:00 AM
Description
This study explores the morphodynamic impact of groups of piers with different configurations (i.e., span characteristics, number of piers, and different reach locations) in a river cross section. It focuses on sandy low-land rivers presenting steady alternate bars and low Froude numbers. A 2DH (vertically integrated) numerical physics-based model (Delft3D) is used to simulate a straight channel, which is inspired from a Nile River reach in Egypt, downstream of the High Aswan Dam. The results show the formation of a forced bar upstream and downstream of the piers and increased deposition over the existing steady bars with different intensities. The nearest bars to the structures are the most affected ones. Large spans between bridge piers and more uniform pier distribution are found to decrease the deposition and its extension, hence reducing dredging investments for navigability.
Large-Scale Morphodynamic Impact of Groups of Piers on Low-Land Rivers
Virtual
This study explores the morphodynamic impact of groups of piers with different configurations (i.e., span characteristics, number of piers, and different reach locations) in a river cross section. It focuses on sandy low-land rivers presenting steady alternate bars and low Froude numbers. A 2DH (vertically integrated) numerical physics-based model (Delft3D) is used to simulate a straight channel, which is inspired from a Nile River reach in Egypt, downstream of the High Aswan Dam. The results show the formation of a forced bar upstream and downstream of the piers and increased deposition over the existing steady bars with different intensities. The nearest bars to the structures are the most affected ones. Large spans between bridge piers and more uniform pier distribution are found to decrease the deposition and its extension, hence reducing dredging investments for navigability.