Journal of Korea Water Resources Association (한국수자원학회논문집)

Korea Water Resources Association (한국수자원학회)
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Re-evaluation of Soyang Dam inflow based on modifying a simple water balance method considering evaporation

증발량을 고려한 단순 물수지 방정식 개선을 통한 소양강댐 유입량의 재평가

  • Yoo, Jiyoung (Research Institute of Engineering & Technology, Hanyang University) ;
  • Lee, Dong Jin (Department of Civil and Environmental System Engineering, Hanyang University) ;
  • Yoo, Do-Guen (Department of Civil Engineering, The University of Suwon) ;
  • Kim, Tae-Woong (Department of Civil and Environmental Engineering, Hanyang University)
  • 유지영 (한양대학교(ERICA) 공학기술연구소) ;
  • 이동진 (한양대학교 대학원 건설환경시스템공학과) ;
  • 유도근 (수원대학교 건설환경공학과) ;
  • 김태웅 (한양대학교(ERICA) 건설환경공학과)
  • Received : 2022.03.17
  • Accepted : 2022.05.21
  • Published : 2022.06.30
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Abstract

It is very important to ensure the reliability of dam inflow data, which is critical in planning and managing the supply and demand of water resources in a basin. However, the simple water balance model sometimes results in negative inflows and does not consider the actual inflow characteristics. In this study, to address these issues, the existing water balance formula was modified by considering evaporation which is available for calculation among other outflows. The modified water balance formula was applied to the Soyang Dam. The results showed that the rate of negative inflows decreased in the re-evaluated dam inflow data and it was possible to secure consistency for the total inflow volume. In addition, investigating the water availability in the Soyang Dam watershed based on the water balance concept considering evaporation, it was found that direct water use in the human aspect was about 60%, and the indirect water use in the natural aspect was about 40%. In drought years, it was also confirmed that the proportion of indirect use of water resources increased.

유역의 수자원 수급계획 시 중요하게 사용되는 댐 유입량은 자료의 신뢰성을 확보하는 것이 매우 중요하다. 하지만 단순 물수지법에 의해 산정되는 댐 유입량은 음유입량이 다수 발생하고, 댐 방류량 이외의 유출량을 생략함으로써 실제 유입량 특성을 반영하지 못한다. 본 연구에서는 이러한 문제를 해결하기 위하여, 물수지에서의 유출량 중 고려 가능한 증발량을 고려하여 물수지 개선식을 제시하였다. 소양강댐을 대상으로 재평가된 댐유입량 시계열에서 음유입량의 발생비율이 감소하고, 자료 생산주기별 유입량의 체적은 일관성을 확보하였다. 이외에도 소양강댐 유역에서의 가용수 자원 특성을 검토한 결과, 인간적 측면에서의 직접적인 사용이 약 60%이고, 자연적 측면에서의 간접적 사용이 약 40%인 것으로 나타났다. 또한 가뭄해에는 전체 수자원의 총량 중 간접적인 수자원 이용의 비중이 증가하는 것이 확인되었다.

Keywords

Acknowledgement

본 연구는 한국연구재단의 개인기초연구(NRF-2020R1C1C1014636)사업의 지원을 받아 수행되었으며, 이에 감사드립니다.

References

  1. Beck, L., and Bernauer, T. (2011). "How will combined changes in water demand and climate affect water availability in the Zambezi river basin?" Global Environmental Change, Vol. 21, No. 3, pp. 1061-1072. https://doi.org/10.1016/j.gloenvcha.2011.04.001
  2. Biglarbeigi, P., Giuliani, M., and Castelletti, A. (2018). "Partitioning the lmpacts of streamflow and evaporation uncertainty on the operations of multipurpose reservoirs in arid regions," Journal of Water Resources Planning and Management, Vol. 144, No. 7, 05018008. https://doi.org/10.1061/(asce)wr.1943-5452.0000945
  3. Block, P., and Strzepek, K. (2010). "Economic analysis of large-scale up-stream river basin development on the Blue Nile in Ethiopia consideringtransient conditions, climate variability, and climate change." Journal of Water Resources Planning and Management, Vol. 136, No. 2, pp. 156-166. https://doi.org/10.1061/(ASCE)WR.1943-5452.0000022
  4. Bozorg-Haddad, O., Athari, E., Fallah-Mehdipour, E., Bahrami, M., and Loaiciga, H.A. (2019). "Allocation of reservoir releases under drought conditions: A conflict-resolution approach." Proceedings of the Institution of Civil Engineers: Water Management, Vol. 172, No. 5, pp. 218-228. https://doi.org/10.1680/jwama.15.00099
  5. Bozorg-Haddad, O., Farhangi, M., Fallah-Mehdipour, E., and Marino, M.A. (2014). "Effects of inflow uncertainty on the performance of multireservoir systems." Journal of Irrigation and Drainage Engineering, Vol. 140, No. 11, 04014035. https://doi.org/10.1061/(ASCE)IR.1943-4774.0000756
  6. Bozorg-Haddad, O., Yari, P., Delpasand, M., and Chu, X. (2022). "Reservoir operation under influence of the joint uncertainty of inflow and evaporation." Environment, Development and Sustainability, Vol. 24, pp. 2914-2940. https://doi.org/10.1007/s10668-021-01560-4
  7. Giuliani, M., and Castelletti, A. (2013). "Assessing the value of cooperation and information exchange in large water resources systems by agent-based optimization." Water Resources Research, Vol. 49, No. 7, pp. 3912-3926. https://doi.org/10.1002/wrcr.20287
  8. Korea Meteorological Administration (KMA) (2016). Guidelines for ground weather observation. p. 50.
  9. Korea Water Resources Corporation (K-water) (2018). K-water data quality management guidelines. p. 124.
  10. Lobell, D., Schlenker, W., and Costa-Roberts, J. (2011). "Climate trends and global crop production since 1980." Science, Vol. 333, No. 6042, pp. 616-620. https://doi.org/10.1126/science.1204531
  11. Loucks, D.P., and van Beek, E. (2005). Water resources systems planning and management: an introduction to methods, models and applications. Studies and reports in hydrology. UNESCO Publishing, Paris.
  12. Noh, J., Lee, H., and Lee, T. (2008). "Comparison study on Korean and American case for improving calculation of dam inflow." Proceedings of 2008 Korea Water Resources Association Annual Conference, pp. 689-694.
  13. Tehrani, M., Samani, J., and Montaseri, M. (2008). "Uncertainty analysis of reservoir sedimentation using latin hypercube sampling and Harr's method: Shahar Chai Dam in Iran." Journal of Hydrology (New Zealand), Vol. 47, No. 1, pp. 25-42.