Journal of Korea Water Resources Association (한국수자원학회논문집)

Korea Water Resources Association (한국수자원학회)
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A study on the rainfall-runoff reduction efficiency on each design rainfall for the green infrastructure-baesd stormwater management

그린인프라 기반 빗물 관리를 위한 설계강우량별 강우-유출저감 효율성 분석 연구

  • Kim, Byungsung (Water Resources Management Research Center, K-water) ;
  • Kim, Jaemoon (Department of Civil and Environmental Engineering, Pusan National University) ;
  • Lee, Sangjin (Water Resources Management Research Center, K-water)
  • 김병성 (한국수자원공사 K-water연구원) ;
  • 김재문 (부산대학교 사회환경시스템공학과) ;
  • 이상진 (한국수자원공사 K-water연구원)
  • Received : 2022.04.07
  • Accepted : 2022.07.21
  • Published : 2022.08.31
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Abstract

Due to the global climate change, the rainfall volume and frequency on the Korean Peninsula are predicted to increase at the end of the 21st century. In addition, impervious surface areas have increased due to rapid urbanization which has caused the urban water cycle to deteriorate. Green Infrastructure (GI) researches have been conducted to improve the water cycle soundness; the efficiency of this technique has been verified through various studies. However, there are still no suitable GI design guidelines for this aspect. Therefore, the rainfall scenarios are set up for each percentile (60, 70, 80, 90) based on the volume and frequency analysis using 10-year rainfall data (Busan Meteorological Station). After determining the GI areas for each scenario, the runoff reduction characteristics are analyzed based on Storm Water Management Model (SWMM) 10-year rainfall-runoff-simulations. The total runoff reduction efficiency for each GI areas are computed to have a range of 13.1~52.1%. As a results of the quantitative analysis, the design rainfall for GI is classified into the 80~85 percentile in the study site.

전 세계적으로 기후변화를 겪고 있으며, 21세기 말 한반도에서 강우의 강도와 빈도가 증가할 것으로 전망하였다. 또한, 급격한 도시개발로 인해 불투수면적이 증가하여 도시 물순환 건전성이 왜곡되었다. 물순환 건전성 회복을 위해 빗물 관리기법 관련 연구가 다양하게 진행되어 빗물 관리기법의 효과는 검증되었지만 도시 물순환 건전성을 위해 적합한 설계 가이드라인이 없는 실정이다. 본 연구에서는 도시 빗물 관리기법의 설계 가이드라인 방법론을 제시하기 위해 부산관측소 10년 강우자료를 통해 60, 70, 80, 90 백분위수의 강우량 및 강우 지속시간별 시나리오를 설정하였다. 적절한 도시 빗물 관리를 위해 시나리오별로 그린인프라의 규모를 산정하였으며, SWMM 모형을 이용하여 장기 강우(10년)-유출량 모의를 통해 저감특성을 분석하였다. 그 결과 그린인프라 규모별 총 유출 저감량은 13.1~52.1%로 나타났다. 빗물 관리 목표량을 설정하기 위해 데이터를 정량적으로 분석한 결과 대상지역에서는 80~85 백분위수의 강우량으로 설정하는 것이 효과적으로 나타났다.

Keywords

References

  1. Abduljaleel, Y., and Demissie, Y. (2021). "Evaluation and optimization of low impact development designs for sustainable stormwater management in a changing climate." Water, Vol. 13, No. 20, 2889.
  2. Adams, B.J., and Papa, F. (2000). Urban stormwater management planning with analytical probabilistic model. John Wiley Sons, NY, U.S.
  3. Choi, J.Y., and Koh, E.J. (2008). "A study on impervious cover management plan and identification according to urban land use pattern." Journal of Regional Policies, Vol. 19, No. 2, pp. 131-148.
  4. Gwangju Metropolitan City (GMC) (2018). Gwangju master plan for water cycle management.
  5. Kim, H.Y., and Kim, G.W. (2021). "An effectiveness study on the use of different types of LID for water cycle recovery in a small catchment." Land, Vol. 10, No. 10, 1055.
  6. Korea Meteorological Administration (KMA) (2020). Koran climate change assessment report 2020.
  7. K-water (2015). Construction documents report.
  8. Land and Housing Institute (LHI) (2017). A study on introduction plan of low impact development techniques in multifunctional administrative.
  9. Lee, H.W. (2009). "A study on watershed model for predicting the runoff characteristics of urban area." Journal of Korean Society of Environmental Engineers, Vol. 31, No. 12, pp. 1089-1094.
  10. Lee, J.W., and Chung, G.H. (2017). "Estimation of interevent time definition using in urban areas." Journal of the Korean Society of Hazard Mitigation, Vol. 17, No. 4, pp. 287-294. https://doi.org/10.9798/kosham.2017.17.4.287
  11. Mattos, T.S., Oliveira, P.T.S., de Souza Bruno, L., de Oliveira, N.D., Vasconcelos, J.G., and Lucas, M.C. (2021). "Improving urban flood resilience under climate change scenarios in a tropical watershed using low-impact development practices." Journal of Hydrologic Engineering, Vol. 26, No. 12, 05021031.
  12. Ministry of Environment (ME) (2016). The installation, management and operation manual of the non-point pollution reduction facilities.
  13. Ministry of Environment (ME) (2022). Sewerage design standard.
  14. Ministry of Land, Transport and Maritime Affairs (MOLIT) (2012). Design flood estimation tips.
  15. Ministry of the Interior and Safety (MOIS) (2018). Standards for type.structure.installation and maintenance of rainwater runoff reduction facilities.
  16. Ministry of the Interior and Safety (MOIS). (2021). Disaster yearbook.
  17. Noh, H.S., Jo, D.H., Kim, Y.S., and Ahn, T.J. (2017). "Changes and influences of stream water quantity due to urbanization: focusing on urban streams in Gyeonggi-do." Journal of Wetlands Research, Vol. 19, No. 4, pp. 491-500. https://doi.org/10.17663/JWR.2017.19.4.491
  18. Oh, S.K., Kim, K.H., and Lee, C.Y. (2015). "Analysis on the current status of impervious ratio in land-use zone using pervious/impervious map based on GIS - Focused on Bupyeong-gu Incheon -." Proceeding of the 2015 May Korea Water Resources Association Conference. KWRA, p. 191.
  19. Seoul Metropolitan Government (SMG) (2013). Seoul master plan for rainwater management.
  20. Ulsan Metropolitan City (UMC) (2018). Master plan for water cycle leading city.
  21. Yoo, S.H., Lee, D.K., Kim, H.M., and Cho, Y.C. (2015). "An analysis of the water balance of low impact development techniques according to the rainfall types." Journal of Environmental Impact Assessment. Vol. 24, No. 2, pp. 163-174. https://doi.org/10.14249/EIA.2015.24.2.163