| Title |
Strategy for Enhancing Flood Control Capacity of Seomjin River Basin Using Both Structural and Non-structuralMeasures |
| Authors |
이동열(Lee, Dong Yeol) ; 백경오(Baek, Kyong Oh) |
| DOI |
https://doi.org/10.12652/Ksce.2024.44.5.0683 |
| Keywords |
섬진강유역; 홍수조절능력; 구조적/비구조적 대책; 탄력제한수위; 천변저류지 Seomjin River basin; Flood control capacity; Structural and non-structural measures; Flexible operation of FSRWL; Riverside storage area |
| Abstract |
Flood control capacity enhancement measures in watersheds can be broadly categorized into structural and non-structural approaches. In this study, we propose the improvement of the flood control capacity in the Seomjin River basin through non-structural measures by optimizing the operation of the Seomjin River Dam, specifically by introducing a flexible flood season restricted water level (FSRWL). The flexible operation of FSRWL involves setting lower restricted water levels at the beginning of the flood season to increase flood control capacity and gradually raising them as the season progresses to manage flood control more effectively. As a structural measure, we examined the installation of riverside storage areas, a representative technique of nature-based solutions (NbS). Using the 2020 flood event as a case study, we analyzed the flood level reduction effects of implementing structural and non-structural measures both separately and simultaneously to identify the most effective and economical approach. The results indicate that the optimal flood prevention strategy for the main stream of the Seomjin River during the 2020 flood event involves operating the Seomjin River Dam FSRWL at EL. 190 m during the mid-flood season as a non-structural measure and installing a riverside storage area downstream of Godalgyo Bridge in Daepyeong-ri, Gokseong-gun as a structural measure. |