Simulation of Sediment Deposition Behavior in a Reservoir using a SED2D model: Focusing on Sensitivity of Simulation Time Step

Abstract

In this study, the following conclusions were obtained from an investigation of the effect of the simulation time step on the simulation results of the two-dimensional, vertically averaged sediment transport model SED2D and an analysis of the deposited sediment distribution in suspended sediments of reservoirs according to grain size. The simulation time step has a significant effect on the deposited sediment distribution in a reservoir. In particular, if the simulation time step is set to be excessively large, physically invalid results are obtained. Additionally, in order to determine an appropriate simulation time step for SED2D, the selection of a simulation time step that will allow the analysis of the suspended sediment concentration profile at the main points of the simulation domain is necessary. The deposited sediment distribution in a reservoir according to grain size, including suspended sediments of clay, silt, and sand, was successfully simulated. Such information will prove valuable in application to the establishment of efficient management and reduction measures of reservoir sediment deposits.

Effects of Control of Dam Sedimentation by a Hydraulic Structure in a Reservoir

“…용담댐 의 실측 비퇴사량 자료를 이용하여 유량-유사량 관계식 을 적용한 SMS모형으로 저수지의 비퇴사량 산정방법을 제안하였다 (Jang et al, 2012). 장기유출에 근거한 저수지 장기운영을 위한 저수지 퇴사량 산정 및 퇴사분포 저감방 안 수립을 위해 2차원 수치모형을 적용하였으며 (Ahn et al, 2006), Kim (2012) (1.a)…”