Flood Risk Management for Weirs: Integrated Application of Artificial
Intelligence and RESCON Modelling for Maintaining Reservoir Safety
Muhammad Bilal Idrees
*, Dongwook Kim
**, Jin-Young Lee
***, Tae-Woong Kim
**** ...Abstract
Annual sediment deposition in reservoirs behind weirs poses flood risk, while its accurate prediction remains a challenge. Sediment management by hydraulic flushing is an effective method to maintain reservoir storage. In this study, an integrated approach to predict sediment inflow and sediment flushing simulation in reservoirs is presented. The annual sediment inflow prediction was carried out with Artificial Neural Networks (ANN) modelling. RESCON model was applied for quantification of sediment flushing feasibility criteria. The integrated approach was applied on Sangju Weir and also on estuary of Nakdong River (NREB). The mean annual sediment inflow predicted at Sangju Weir and NREB was 400,000 m3 and 170,000 m3,
respectively. The sediment characteristics gathered were used to setup RESCON model and sediment balance ratio (SBR) and long term capacity ratio (LTCR) were used as flushing efficiency indicators. For Sangju Weir, the flushing discharge, Qf = 140 m3/s with a drawdown
of 5 m, and flushing duration, Tf = 10 days was necessary for efficient flushing. At NREB
site, the parameters for efficient flushing were Qf = 80 m3/s, Tf = 5 days, N = 1, Elf = 2.24
m. The hydraulic flushing was concluded feasible for sediment management at both Sangju Weir and NREB.
Keywords : Risk management, RESCON modelling, Reservoir sedimentation, Artificial neural network
Acknowledgment
This research was supported by a grant(2020-MOIS33-006) of Lower-level and Core Disaster-Safety Technology Development Program funded by Ministry of Interior and Safety(MOIS, Korea)
* Ph.D student, Dept. of Civil and Environmental Engineering, Hanyang University ** M.S student, Dept. of Civil and Environmental System Engineering, Hanyang University *** Ph.D candidate, Dept. of Civil and Environmental Engineering, Hanyang University
**** Professor(Corresponding author), Dept. of Civil and Environmental Engineering, Hanyang University (ERICA)⋅E-mail :
2020 한국수자원학회 학술발표회
