River Hydraulics in Analyzing the Impact of the River Groynes Distance on the Quantity of Erosion in River Channel

Abstract:

Erosion and sedimentation generally occur in river channels. Erosion impacts reducing the walls and bottom of the channel due to shear stress between the moving fluid particles and the channel particles. Sedimentation causes a buildup of sediment particles resulting from erosion in an area of the river which results in shallowing. In efforts to overcome erosion on river walls, especially at river bends, the river “groynes” is usually used. In this research, we tested the effectiveness of river “groynes” spacing in reducing erosion on river walls. We carried out numerical simulations to prove the effectiveness of river “groynes” in reducing flow velocity. Based on the results of this research, it is proven that with the presence of a river “groynes”, there is a decrease in flow velocity on the river wall where the river “groynes” are installed. The closer or smaller the distance between the river “groynes”, the smaller the impact of erosion that will occur.

• Periodical: Construction Technologies and Architecture (Volume 18)
• Pages: 51-58
• DOI: https://doi.org/10.4028/p-7ZFZi2
• Online since: June 2025
• Authors: Riki Chandra Wijaya, Umboro Lasminto*, Mahendra Andiek Maulana, Anak Agung Ngurah Satria Damarnegara, Putu Tantri Kumala Sari, Zulyaden Zulyaden
• Keywords: Erosion and Sedimentation, Numerical Simulation, Physical Model, River Groins

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