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Calculation of the Areal Reduction Factor of Hancheon River Basin based on Considering the Rainfall Characteristics in Jeju Island

제주도의 강우특성을 고려한 한천유역의 면적감소계수 산정연구

  • Kang, Myung-Soo (Department of Civil Engineering, Jeju National University) ;
  • Yang, Sung-Kee (Department of Civil Engineering, Jeju National University) ;
  • Kim, Young-seok (Department of Civil Engineering, Jeju National University) ;
  • Kang, Bo-Seong (Department of Civil Engineering, Jeju National University) ;
  • Yang, Se-Chang (Jeju Special Self-Governing Provincial Council)
  • 강명수 (제주대학교 토목해양공학과) ;
  • 양성기 (제주대학교 토목해양공학과) ;
  • 김용석 (제주대학교 토목해양공학과) ;
  • 강보성 (제주대학교 토목해양공학과) ;
  • 양세창 (제주특별자치도의회)
  • Received : 2017.12.04
  • Accepted : 2017.12.14
  • Published : 2017.12.31

Abstract

In this study, we calculated the fixed-type Areal Reduction Factor (ARF) of the Hancheon River basin in Jeju Island, and compared the calculated ARF and the ARF of the four major river basins suggested by the Ministry of Land, Infrastructure and Transport. As a result, the maximum fluctuation ratios of ARF for the four major river basins calculated using area, frequency, and initial duration time were significant: 7.61% for the Hangang River basin; 12.69% for the Nakdonggang River basin; 8.09% for the Kumgang River basin; and 17.98% for the Yeongsangang River basin. In addition, the differences between the maximum and minimum value of ARF for the Hancheon River basin based on 48 hours was 2.13%, and it was smaller than the one for the four major river basins: 8.92% for the Hangang River basin; 11.41% for the Nakdonggang River basin; 8.87% for the Kumgang River basin; and 17.17% for the Yeongsangang River basin. The Yeongsangang River basin had the highest difference.

Keywords

Areal Reduction Factor;Hancheon river basin;Four major river basin

Acknowledgement

Supported by : 국토교통부

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