Evaluation of hydropower dam water supply capacity (III): development and application of drought operation rule for hydropower dams in Han river

Gimoon Jeong; Doosun Kang; Taesoon Kim

doi:10.3741/JKWRA.2022.55.7.531

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2022 Vol.55, Issue 7 Preview Page Next Page

Research Article

Evaluation of hydropower dam water supply capacity (III): development and application of drought operation rule for hydropower dams in Han river 발전용댐 이수능력 평가 연구 (III): 한강수계 발전용댐 가뭄단계별 운영기준 개발 및 효과 분석

31 July 2022. pp. 531-543

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Abstract

Integrated water resources management (IWRM) has focused on efficient response to various water related disasters by climate change. In particular, more flexible usage of conventional water resources infrastructures is expected to provide an eco-friendly water management. Multi-purpose dams and water supply dams are well known as water management facilities for securing and supplying water in drought season. Recently, based on the report ‘2021 multi-purpose use of hydropower dams in Han river’, contribution of hydropower dams on water resources management is becoming more significant beyond the traditional role of hydropower generation. In drought conditions, the dams control water supply depending on the pre-defined drought stages. In the case of multi-purpose dams, an operation standard during drought has been already prepared and applied; however, for the hydropower dams, specific standards are not fully prepared yet in South Korea. In this study, a method for calculation of standard water storage and discharge reduction of hydropower dams according to drought stage is newly proposed reflecting the characteristics of hydropower dams. The proposed method was applied to the hydropower dams in Han river, where six hydropower dams are located. A case study of the historical droughts occurred in 2014-2017 demonstrated that the proposed hydropower dam operation rule could improve the water supply stability under severe drought conditions compared to the conventional operations. In the future, the role of hydropower dams for water resources management is expected to become more important, and this study can be widely used for water supply planning such as drought response using hydropower dams.

Keywords

Climate change

Drought response

Hydropower dam

Operation rule

최근 국내에서는 수량, 수질 등 기후변화로 인한 다양한 수자원 문제에 효율적으로 대응하기 위한 통합물관리 체계가 점차 고도화되고 있으며, 특히 친환경적인 관점에서 이미 개발된 수자원시설물의 탄력적인 활용 방안이 주목받고 있다. 이처럼 용수를 사전에 확보하고, 적시에 공급하기 위한 대표적인 수자원 관리 시설로 다목적댐, 용수전용댐 등이 가장 잘 알려져 있으나, 지난 2021년 ‘한강수계 발전용댐 다목적 활용 협약’을 기점으로 발전용댐 또한 기존의 수력발전 용도를 넘어 수자원 관리 기여도가 한층 높아지게 되었다. 댐에서는 가뭄 발생시 구체적인 가뭄단계 파악 및 용수공급량 조절을 통해 용수공급을 조절해야 한다. 이미 다목적댐 및 용수전용댐의 경우 가뭄대응을 위한 용수공급 운영기준이 마련되어 적용 중에 있으나, 최근에 다목적 활용이 추진된 발전용댐의 경우 구체적인 관련 기준이 마련되어 있지 않은 실정이다. 본 연구에서는 기존 다목적댐 및 용수전용댐 운영기준을 참고하여, 발전용댐의 가뭄단계별 기준저수량 산정 방안 및 용수공급 조정 방안 등을 제시하였다. 제시된 방법은 국내 대부분의 발전용댐이 위치한 한강수계 발전용댐을 대상으로 적용하였으며, 지난 2014~2017년 발생한 가뭄사례를 바탕으로 그 적용 효과를 분석한 결과, 대상 발전용댐의 용수공급 안정성이 개선되는 효과를 확인하였다. 수자원의 효율적인 이용을 위한 발전용댐의 역할은 점차 중요해질 것으로 예상되며, 본 연구 결과는 발전용댐을 활용한 용수공급 관련 연구에 폭넓게 활용될 수 있을 것으로 기대된다.

키워드

가뭄대응

기후변화

발전용댐

운영기준

References

Bayazit, M., and Unal, N.E. (1990). "Effects of hedging on reservoir performance." Water Resources Research, Vol. 26, No. 4, pp. 713-719. 10.1029/WR026i004p00713

Choi, J., Jeong, G., Kang, D., Ahn, J., and Kim, T. (2021). "Classification of hydropower dam in North-han River based on water storage characteristics." Journal of Korea Water Resources Association, Vol. 54, No. 8, pp. 567-576. 10.3741/JKWRA.2021.54.8.567

Choi, Y., Lee, E., Ji, J., Ahn, J., Kim, T., and Yi, J. (2020). "Development and evaluation of the hydropower reservoir rule curve for a sustainable water supply." Sustainability, Vol. 12, No. 22, 9641. 10.3390/su12229641

Draper, A.J., and Lund, J.R. (2004). "Optimal hedging and carryover storage value." Jornal of Water Resources and Management, Vol. 130, No. 1, pp. 83-87. 10.1061/(ASCE)0733-9496(2004)130:1(83)

Jin, Y., Jeong, T., and Lee, S. (2021). "Analysis and comparison of the water supply adjustment guide and a hedging rule of reservoir operation derived from mixed-integer programming for water supply operation of a multi-purpose reservoir." Journal of Korea Water Resources Association, Vol. 54, No. 6, pp. 443-452. 10.3741/JKWRA.2021.54.6.443

Kim, H.S., Park, J.H., Kang, S.U., and Jang, S.H. (2019). "Improvement and evaluation of multi-purpose dam operation rule considering climate change." Journal of Wetlands Research, Vol. 21, No.Spc, pp. 9-15.

Kim, J.M., Park, J.H., Jang, S.H., and Kang, H.W. (2018). "Development and effective analysis of termination criteria at each drought response stage in a multipurpose dam." Journal of the Korean Society of Hazard Mitigation, Vol. 18, No. 5, pp. 23-31. 10.9798/KOSHAM.2018.18.5.23

Lee, D. (2018). Water supply adjustment guideline for single-purpose dam against drought. Master Thesis, Kyungpook National University.

Ministry of Land, Infrastructure and Transport (MOLIT) (2015). Improvement report of water supply adjustment criteria.

Ministry of Land, Infrastructure and Transport (MOLIT) (2016). Improvement report of water supply adjustment criteria.

Ministry of Land, Infrastructure and Transport (MOLIT) (2018). Improvement report of water supply adjustment criteria.

Shih, J.S., and Revelle, C.S. (1995). "Water supply operations during drought: A discrete hedging rule." Journal of Water Resources Planning and Management, ASCE, Vol. 82, pp. 163-175. 10.1016/0377-2217(93)E0237-R

Tayebiyan, A., Mohammad, T.A., Al-Ansari, N., and Malakootian, M. (2019). "Comparison of optimal hedging policies for hydropower reservoir system operation," Water, Vol. 11, No. 1, 121. 10.3390/w11010121

Tu, M.T., Hsu, N.S., Tsai, F.T.C., and Yeh, W.W.G. (2008). "Optimization of hedging rules for reservoir operations." Journal of Water Resources Planning and Management, ASCE, Vol. 134, No. 1, pp. 3-13. 10.1061/(ASCE)0733-9496(2008)134:1(3)

US. Army Corps of Engineers (USACE) (1998). HEC-5, simulation of flood control and conservation systems, user's manual. US Army Corps of Engineers Institute for Water Resources Hydrologic Engineering Center (HEC). Davis, CA, U.S.

US. Army Corps of Engineers (USACE) (2021). HEC-ResSim: Reservoir system simulation user's manual version 3.3. US Army Corps of Engineers Institute for Water Resources Hydrologic Engineering Center (HEC). CPD-82, Davis, CA, U.S.

Zhou, Y., and Guo, S. (2013). "Incorporating ecological requirement into multipurpose reservoir operating rule curves for adaptation to climate change." Journal of Hydrology, Vol. 498, pp. 153-164. 10.1016/j.jhydrol.2013.06.028

Information

Publisher :KOREA WATER RESOURECES ASSOCIATION
Publisher(Ko) :한국수자원학회
Journal Title :Journal of Korea Water Resources Association
Journal Title(Ko) :한국수자원학회 논문집
Volume : 55
No :7
Pages :531-543
Received Date : 2022-05-15
Revised Date : 2022-06-07
Accepted Date : 2022-06-08
DOI :https://doi.org/10.3741/JKWRA.2022.55.7.531

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

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