Author(s): Joon Gu Kang; Hong Ku Yeo; Keum Chan Lee; Sung Jung Kim
Linked Author(s): Hongkoo Yeo, Joon-Gu Kang
Keywords: Bandoned channel; Hydraulic model; FESWMS; Deposition
Abstract: Recently, the paradigm of river restoration has been deemed important in the flood plan involving an abandoned channel. Therefore, efforts to make the abandoned channel area the territory of the river area through an improvement project have been made. As part of the river restoration project, this study was conducted using hydraulic and numerical models to grasp the flow characteristic and bed change in the abandoned channel restoration. The hydraulic model was a medium-sized area in Hampyengcheon (stream length: 1.3km). The horizontal scale was 1/50, and the vertical scale was 1/40. The numerical model used FESWMS. The conditions of hydraulic and numerical models were frequency flood discharge (50,100 years) and channel formation discharge (100 m3/s, 120 m3/s). Flow characteristic was analyzed under fixed condition using hydraulic and numerical models. Bed change in the abandoned channel restoration was analyzed for deposition trends based on the sediment supply from the upstream area in the hydraulic model. The results of bed shear stress were then compared in the numerical model. The results of the velocity profile and bed shear stress of the numerical model were similar to the trends in measured velocity and deposition of the hydraulic model. The findings of this study will be applied to the restoration design of an abandoned channel.
Year: 2009