Journal of Korea Water Resources Association (한국수자원학회논문집)

Korea Water Resources Association (한국수자원학회)
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Development of the evaluation method for hydrological cycle soundness: application to Gyeongan stream watershed

수문 순환 건전성 평가 기법 개발 : 경안천 유역 적용

  • Kim, Geon (Department of Civil Engineering, Kookmin University) ;
  • Lee, Jae-Beom (Department of Civil Engineering, Kookmin University) ;
  • Yang, Jeong-Seok (Department of Civil Engineering, Kookmin University)
  • 김건 (국민대학교 건설시스템공학부) ;
  • 이재범 (국민대학교 건설시스템공학부) ;
  • 양정석 (국민대학교 건설시스템공학부)
  • Received : 2021.08.17
  • Accepted : 2021.09.03
  • Published : 2021.11.30
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Abstract

In this study, a hydrological cycle soundness evaluation method was developed using monthly meteorological observation data. The Gyeongan stream watershed was divided into five sub-basins and eight criteria were established for hydrological cycle evaluation: the number of non-rainfall day, the number of non-rainfall day fluctuation, over 30 mm per day, over 30 mm per day fluctuation, average river level, average river level fluctuation, average groundwater level and average groundwater level fluctuation. Observation data were normalized and weights for evaluation by each sub-basin were calculated using the entropy method. The hydrological cycle soundness evaluation indices were calculated using TOPSIS applying the calculated weight value. As a result of the study, it was found that the hydrological cycle soundness was unstable in the Gyeongan-upstream from November to January, the Gyeongan-suwipyo from February to April, Gonjiam stream from April to May, and the Gyeongan-downstream from November to February. In this study, the developed technique is expected to serve as a quantitative basis for policy decision to recover hydrological cycle soundness.

본 연구에서는 월 단위 수문순환 관측자료를 이용하여 수문순환 건전성 평가 기법을 개발하였다. 경안천 유역을 다섯 개의 소유역으로 나누고 무강우 일수, 무 강우 일수 변동폭, 일 30 mm 이상 강우 횟수, 일 30 mm 이상 강우 횟수 변동폭, 평균하천수위, 평균하천수위 변동폭, 평균지하수위, 평균지하수위 변동폭으로 8가지 수문순환 건전성 평가 기준을 정하였다. 관측값을 표준화를 하고 엔트로피 방법을 이용하여 각 소유역 별 가중치를 산정하였다. 산정된 가중치 값으로 TOPSIS를 이용하여 수문순환 건전성 평가 지수를 산정하였다. 연구결과 경안천 상류는 11 ~ 1월, 경안천 수위표는 2 ~ 4월, 곤지암천은 4 ~ 5월, 경안천 하류는 11 ~ 2월에 수문순환 건전성 불안전한 것으로 나왔다. 본 연구에서 개발 기법은 수문순환 건전성을 관리 방안을 수립하는 정책적 결정에 있어 정량적 근거가 될 수 있을 것으로 기대된다.

Keywords

Acknowledgement

본 연구는 2021년도 한강수계관리위원회 환경기초조사사업의 지원을 받아 수행된 연구입니다.

References

  1. Bae, Y.J., Lee, Y.J., Jeong, B.U., and Jeong, H.C. (2020). Korean Climate Change Assessment Report 2020.
  2. Choi, C.H., Choi, D.G., Lee, J.K., and Kim, S.D. (2011). "An hybrid approach for designing detention and infiltration-based retentions to promote sound urban hydrologic cycle." Journal of Korean Society of Environmental Engineers, Vol. 33, No. 1, pp. 1-8. https://doi.org/10.4491/KSEE.2011.33.1.001
  3. Choi, W.H., Sin, J.W., Choi, M.H, and Park, H.Y. (2009). "A study of index and method for estimating the rate of rehabilitated hydrological cycle." Proceedings of Korea Society of Civil Engineers Conference, KSCE, pp. 2114-2117.
  4. Chung, E.S., Abdulai, P.J., Park, H., Kim, Y., Ahn, S.R., and Kim, S.J. (2017). "Multi-criteria assessment of spatial robust water resource vulnerability using the TOPSIS method coupled with objective and subjective weights in the Han River basin." Sustainability, Vol. 9, No. 1, p. 29. https://doi.org/10.3390/su9010029
  5. Falkenmark, M. (1997). "Society's interaction with the water cycle: A conceptual framework for a more holistic approach." Hydrological Sciences Journal, Vol. 42, No. 4, pp. 451-466. https://doi.org/10.1080/02626669709492046
  6. Fatichi, S. (2010). The modeling of hydrological cycle and its interaction with vegetation in the framework of climate change. Ph. D dissertation, University of Firenze, Florence, Italy, pp. 247-278.
  7. Hwang, C.L., and Yoon, K. (1981). Methods for multiple attribute decision making. In Multiple attribute decision making, Springer, Berlin, Heidelberg. pp. 58-191.
  8. Kim, H.J., Kim, D.P., Jung, I.M., Hong, I.P., Jang, C.H., and Noh, S.J. (2004). "Water balance analysis in the Cheonggyecheon watershed by observation data." Proceedings of the Korea Water Resources Association Conference, KWRA, pp. 620-623.
  9. Kundzewicz, Z.W. (2008). "Climate change impacts on the hydrological cycle." Ecohydrology & Hydrobiology, Vol. 8, No. 2-4, pp. 195-203. https://doi.org/10.2478/v10104-009-0015-y
  10. Lee, J.M., and Kim, J.L. (2012). "The urban water cycle planning elements and hydrologic cycle simulation for green city." LHI Journal of Land, Housing, and Urban Affairs, Vol. 3, No. 3, pp. 271-278. https://doi.org/10.5804/LHIJ.2012.3.3.271
  11. Lee, J.W. and Kim, S.J. (2019). "Watershed management sector climate change watershed vulnerability and impact assessment strategy." KSCE magazine, Vol. 67, No. 8, p. 10.
  12. Nardo, M., Saisana, M., Saltelli, A., and Tarantola, S. (2005). "Tools for composite indicators building." European Comission, Ispra, Vol. 15, No. 1, pp. 19-20.
  13. Shannon, C.E. and Weaver, W. (1949). The mathematical theory of communication. University of Illinois Press, London and New York, U.S.
  14. Song, S.U., Cho, E., and Yoo, C. (2017). "Analysis of change in hydrological cycles of South Korea, China and Japan due to the change of their vegetation since 1950." Journal of Wetlands Research, Vol. 19, No. 4, pp. 470-483. https://doi.org/10.17663/JWR.2017.19.4.470
  15. Song, S.U., Lee, J., Cho, E., and Yoo, C. (2017). "Comparative evaluation of hydrological cycle in South and North Korea using a land surface model." Journal of Wetlands Research, Vol. 19, No. 1, pp. 16-29. https://doi.org/10.17663/JWR.2017.19.1.016
  16. Trenberth, K.E. (1999). "Conceptual framework for changes of extremes of the hydrological cycle with climate change." Climate Extremes, Vol. 42, pp. 327-339. https://doi.org/10.1007/978-94-015-9265-9_18