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Numerical Simulation for River Safety of Saemangeum Basin according to Master Plan

새만금 종합개발계획에 따른 새만금 유역 치수 안전성 수치모의

  • Jeong, Seok il ;
  • Yoo, Hyung Ju ;
  • Ryu, Kwang Hyun ;
  • Lee, Seung Oh
  • 정석일 ;
  • 유형주 ;
  • 류광현 ;
  • 이승오
  • Received : 2018.05.02
  • Accepted : 2018.08.16
  • Published : 2018.10.31

Abstract

The Saemangeum master plan includes dredging and waterproofing materials, construction projects that can change the hydraulic characteristics of the Saemangeum and Mangyeong and Dongjin River basins. In this study, the river safety of 2030 when the Saemangeum master plan was completed for 100 year frequency, 500 year frequency and 100 year frequency applied RCP 8.5 scenario was examined using Delft3D. As a result of the analysis, it was confirmed that there was no overflowing point at the 100 year frequency, but the difference between the flood level and the river bank elevation was relatively small at the curved and river joint part. At the 100-year frequency with the 500-year frequency and the RCP 8.5 scenario, the possibility of overflowing at several locations was confirmed. The possibility of river bed loss due to fast velocity appears in the upstream part of Mankyung River and it is necessary to monitor the safety of hydraulic structures continuously. In addition, it is expected that the expansion of the area showing the characteristics of the lake due to dredging will affect the sediment mechanism and water quality, so detailed and diverse studies will be needed.

Keywords

saemangeum;Delft3D;design flood;RCP scenario;simulation

Acknowledgement

Supported by : 행정안전부