In this study, the fish-migration ratios of rivers were analyzed, with the aim of proposing objective materials to help South Koreans to establish fish migration systems efficiently in the future. A total of 34,012 weirs have been built in the five major basins, with 5,081 fish-ways observed. Consequently, the fish migration ratio was considered low (14.9 %). According to the findings of the study analyzing the 5,081 fish-ways, standard-type fish-ways took up 68 % of the total while the non-standard types accounted for 32 %. The five major basins were observed to have a total fish-migration ratio of 21.4 %. Regarding tributaries, Tributary 1 accounted for 27.5 % of the fish-migration ratio, while Tributary 2 and 3 accounted for 19.8 % and 16.3 %, respectively. In conclusion, the study argues that any relevant field in the fishing industry of South Korea needs to improve their understanding of the fish-migration ratio. This would be expected, eventually, to help them maximize the efficiency of a minimum number of fish-ways. In addition, the study supports the need for those in relevant fields to study carefully the ecological needs of each fish species, before establishing priority standards for the building of fish-ways.

Abstract
  1. 서론
 2. 재료 및 방법
  2.1. 대상지의 개요
  2.2. 조사 및 분석방법
 3. 결과 및 고찰
  3.1. 보 및 어도 현황
  3.2. 하천설계기준에 따른 어도의 형식 분류
  3.3. 어도 연계율 평가
 4. 결론
 REFERENCE

• 차순배(금오공과대학교 환경공학과) | Cha Soon-Bae (Department of Environmental Engineering, Kumoh National Institute of Technology)
• 성진욱(금오공과대학교 환경공학과) | Seong Jin-Uk (Department of Environmental Engineering, Kumoh National Institute of Technology)
• 김재옥(한국농어촌공사 농어촌연구원) | Jae-ok Kim (Rural Research Institute Korea Rural Community Corporation)
• 박제철(금오공과대학교 환경공학과) | Je-Chul Park (Department of Environmental Engineering, Kumoh National Institute of Technology) Corresponding author