Evaluation of instream flow in Han river according to the Imnam dam operation in North Korea

Jae-Kyoung Lee; Suk Hwan Jang; Nam-Jae Ihm

doi:10.3741/JKWRA.2020.53.1.71

All Issue

2020 Vol.53, Issue 1 Preview Page Next Page

Review Article

Evaluation of instream flow in Han river according to the Imnam dam operation in North Korea 북한 임남댐 운영에 따른 북한강 하천유지유량 평가

31 January 2020. pp. 71-82

PDF XML

Abstract

The objective of this study is to evaluate the instream flow in the North Han River basin according to the operation of Imnam Dam in North Korea. The water budget and instream flow satisfaction were analyzed using hourly, daily and monthly data of Water Management Information System (WAMIS) from Jan. 1991 to Dec. 2018. As a analysis result of water budget using hourly data in the North Han River basin, although inflows compared with dam release in the upstream basin of Peace Dam-Hwacheon Dam and Chuncheon Dam-Soyanggang Dam-Uiam Dam were calculated as negative values, the reasonable results using daily and monthly average data were estimated. It showed that the results of water budget analysis of dam inflow and total release may be different by time units of data. The monthly average inflow of Hwacheon Dam decreased significantly after the construction in 2003 of Imnam Dam, which confirmed that the operation of Imnam Dam had a significant effect on the dams in the North Han River basin. The operation of Imnam Dam is one of the main reasons for the lack of instream flow and total shortage amounts and shortage period increased up to +330% due to the decrease in inflow and total release of dams in the North Han River water after the operation of Imnam Dam. It is necessary to study various plans to secure instream flow including transboundary river management

Keywords

Instream flow

Shared river

North Han River

Imnam Dam

본 연구에서는 공유하천인 북한강 유역을 대상으로 북한 임남댐 운영에 따라 북한강 댐들의 하천유지유량 확보여부에 대해 평가하였다. WAMIS자료 기준 1991. 01~2018. 12 기간 동안의 시자료, 일자료, 월자료의 댐 유입․유출량 자료를 기준으로 분석을 수행하였다. 시평균 자료를 이용한 물수지분석 결과를 살펴보면, 평화의댐-화천댐과 춘천댐-소양강댐-의암댐의 댐 방류량 기준 상류유역 유입량이 (‒)값으로 산정되었으나 일평균이나 월평균에서는 합리적으로 추정되어 자료의 시간단위에 따라 댐유입량․방류량 물수지분석 결과가 달라질 수 있음을 확인하였다. 두 번째로 임남댐 운영 후에 화천댐 월평균 유입량이 크게 감소하는 것으로 나타나 임남댐 운영이 북한강 수계 댐에 큰 영향을 미치는 것을 확인하였다. 마지막으로 임남댐 운영으로 인한 북한강 수계 댐들의 유입량과 총방류량의 감소에 따른 하천유지유량 총부족량과 부족시간의 증가비율이 최대 +330%로 증가하는 것으로 나타나 임남댐 운영이 하천유지유량 부족의 주요 원인 중 하나로 분석되었다. 따라서 향후 중요성이 커지는 하천유지유량을 확보하는 다양한 방안 마련에 대한 연구가 필요하다.

키워드

하천유지유량

공유하천

북한강

임남댐

References

Ahn, J., Jung, K., and Lee, G. (2011). "Problems of water use of estimation of water right in North Han River shared by North and South Korea (I) - Analysis of diversion impacts on downstream area by Imnam Dam." Journal of Korea Water Resources Association, Vol. 44, No. 4, pp. 305-314.

10.3741/JKWRA.2011.44.4.305

Bae, J.A. (2018). Estimation of Instream Flow for the protection of Acheilognathus somjinensis's habitat in the Downstream of the Dam, Seomjin River : Using by PHABSIM Model. Masters dissertation, Jeonnam Univeristy, Gwangju, Korea.

Jang, C.H., Kim, H.J., Noh, S.J., and Kim, C.G. (2005). "The water cycle analysis of Kyeongancheon-watershed by using GSSHA." Proceeding of Korea Water Resources Association, pp. 75-79.

Kang, B.S., and Lee, G.M. (2005). "Holistic hierarchical approach to integrated water resources management in th Tumen international river." Journal of Korea Water Resources Association, Vol. 38, No. 4, pp. 323-332.

10.3741/JKWRA.2005.38.4.323

Korea Environmental Institute (KEI) (2010). Developing a framework of water security and cooperation in transboundary rivers of South and North Korea. Research Report 2010-07, Korea Environmental Insitute, Sejong, Korea.

K-water (2002). Water vision: trend analysis report. K-water, Daejeon, Korea.

Lee, G.M., Kang, B., and Hong, I.-P. (2008). "Cooperative framwork for conflict mitigation and shared use of South-North Korea transboundary rivers." Journal of Korean Society of Civil Engineers, Vol. 28, No. 5B, pp. 505-514.

Sah, D. (2017). "Inter-Korean shared river conflict and German integration case." Proceeding of the Korean Association for Public Administration, pp. 2023-2041.

Information

Publisher :KOREA WATER RESOURECES ASSOCIATION
Publisher(Ko) :한국수자원학회
Journal Title :Journal of Korea Water Resources Association
Journal Title(Ko) :한국수자원학회 논문집
Volume : 53
No :1
Pages :71-82
Received Date : 2020-01-17
Revised Date : 2020-01-28
Accepted Date : 2020-01-28
DOI :https://doi.org/10.3741/JKWRA.2020.53.1.71

Journal of Korea Water Resources Association ISSN:2799-8746(Print) 2799-8754(Online) 한국수자원학회 논문집

All Issue