Journal of Wetlands Research (한국습지학회지)

Korean Wetlands Society (한국습지학회)
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Analysis on Rainwater Harvesting System as a Source of Non-Potable Water for Flood Mitigation in Metro Manila

마닐라의 홍수저감을 위한 잡용수 대체자원으로서의 가정용우수저류시설 분석

  • Necesito, Imee V. (Department of Civil and Environ. Eng., Kongju National University) ;
  • Felix, Micah Lourdes A. (Water Resources and Environmental Department, Korea Institute of Construction Technology) ;
  • Kim, Lee-Hyung (Department of Civil and Environ. Eng., Kongju National University) ;
  • Cheong, Tae Sung (Research Planning Department, National Disaster Management Institute) ;
  • Jeong, Sangman (Department of Civil and Environ. Eng., Kongju National University)
  • ;
  • ;
  • 김이형 (공주대학교 건설환경공학부) ;
  • 정태성 (국립재난안전연구원 연구기획과) ;
  • 정상만 (공주대학교 건설환경공학부)
  • Received : 2013.04.08
  • Accepted : 2013.04.17
  • Published : 2013.05.31
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Abstract

Excessive precipitation, drought, heat waves, strong typhoons and rising sea levels are just some of the common indicators of climate change. In the Philippines, excessive precipitation never failed to devastate and drown the streets of Metro Manila, a highly urbanized and flood-prone area; such problems are expected to occur frequently. Moreover, the water supply of Metro Manila is dependent only to Angat Reservoir. Rainwater harvesting can serve as an alternative source of raw water and it can mitigate the effects of flooding. The harvested rainwater can be used for: potable consumption if filtered and disinfected; and non-potable consumptions (e.g., irrigation, flushing toilets, carwash, gardening, etc.) if used untreated. The rainfall data were gathered from all 5 rainfall stations located in Metro Manila namely: Science Garden, Port Area, Polo, Nangka and Napindan rain gauge stations. To be able to determine the potential volume of rainwater harvested and the potentiality of rainwater harvesting system as an alternate source of raw water; in this study, three different climatic conditions were considered, the dry, median and wet rainfall years. The frequent occurrence of cyclonic events in the Philippines brought significant amount of rainwater that causes flooding in the highly urbanized region of Metro Manila. Based from the results of this study, the utilization of rainwater harvesting system can serve as an alternative source of non-potable water for the community; and could also reduce the amount of surface runoff that could result to extreme flooding.

전 세계적으로 발생하고 있는 국지성 집중호우, 가뭄, 혹서, 태풍, 해수면 상승 등과 같은 징후는 기후변화가 진행되고 있음을 보여준다. 이러한 기후변화로 인해 일정빈도이상의 과도한 강우가 발생하면 필리핀의 마닐라는 높은 도시화와 홍수에 취약한 구조 때문에 홍수피해가 빈번하게 발생한다. 마닐라의 홍수조절 기능 및 생활용수 공급은 Angat댐을 통해서만 관리되기 때문에 홍수방지와 원활한 물공급을 위해 가정용우수저류시설은 최적의 대체자원이 될 수 있다. 가정용우수저류시설에 의해 공급되는 물은 여과 및 살균과 같은 수처리 과정을 거쳐 식수로 사용될 수 있으며 수처리 과정을 거치지 않은 잡용수는 세정, 세차, 청소 등의 목적으로 사용할 수 있다. 본 연구에서는 다양한 기후조건을 적용하여 가정용우수저류시설의 잠재가용량과 잠재가용성을 결정하기 위해 마닐라에 위치한 5개 강우관측소에서 갈수해, 평수해, 강수해로 구분하여 강우자료를 수집하였다. 필리핀은 대부분의 지역이 도시화되어 과도한 강우 발생시 많은 양의 우수가 발생되었으며 본 연구의 결과를 통해 가정용우수저류시설의 사용은 잡용수의 대체자원으로서 적절한 대안이 될 것으로 판단된다.

Keywords

References

  1. Asian Development Bank (ADB) (2007). Country Paper: Philippines. Asian Water Development Outlook 2007.
  2. Battiata, J., Collins, K., Hirschman, D., and Hoffmann, G. (2010). The Runoff Reduction Method. Universities Council on Water Resources. Journal of Contemporary Water Research and Education. (146). pp. 11-21.
  3. Cabanilla, A.Q. (1996). Sustainable Development in Urban Management: The Metro Manila Experience. Presented at: Urban Environmental Management for Sustainable Development. Pasig: Development Academy of the Philippines. March 7, 1996.
  4. Che-Ani, A. I.; Shaari, N.; Sairi, A.; Zain, M. F. M.; and Tahir, M. M. (2009). Rainwater Harvesting as an Alternative Water Supply in the Future. European Journal of Scientific Research. (34:1) pp. 132-140.
  5. Daligdig, J., & Besana, G. (1993). Seismological hazards in Metro Manila, In Disaster Prevention and Mitigation in Metropolitan Manila (pp. 9-42). Quezon City, Philippines: Department of Science and Technology and Philippine Institute of Volcanology and Seismology.
  6. Effective Flood Control Operating System of Metro Manila Development Authority (EFCOS/MMDA) (2011). Pasig City. Data Acquired: 2011
  7. Felix, M.L.A.; Maniquiz, M.C.; Seo, S; Kim, L.H.; Jeong, S. (2011). Analysis on the Potentiality of Domestic Rainwater Harvesting in Metro Manila. Korean Wetlands Society. 13(3). pp. 633- 641.
  8. Findlay, D. (2009). Rainwater Collection,Water Law, and Climate Change: A Flood of Problems Waiting to Happen. North Carolina Journal of Law & Technology. 10 N.C. Jolt Online Ed. p.80
  9. Imteaz, M. A.; Ahsan, A.; Naser, J.; and Rahman, A. (2011a). Reliability analysis of rainwater tanks in Melbourne using daily water balance model. Resources, Conservation and Recycling, 56, pp. 80-86. https://doi.org/10.1016/j.resconrec.2011.09.008
  10. Imteaz, M. A.; Shanableh, A; Rahman, A. and Ahsan, A. (2011b). Optimisation of rainwater tank design from large roofs: A case study in Melbourne, Australia. Resources, Conservation and Recycling. 55, pp. 1022- 1029. https://doi.org/10.1016/j.resconrec.2011.05.013
  11. Intergovernmental Panel on Climate Change (IPCC). (2007). Summary for Policymakers, in Climate Change 2007: Impacts, Adaptation and Vulnerability. Contribution of Working Group II to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change. Cambridge University Press. p. 17. Available at: http://www.ipcc.ch/pdf/assessment-report/ar4/ wg2/ar4-wg2-spm.pdf Retrieved at: February 2012.
  12. Kowalsky, G. and Thomason, K. (2010). Rainwater Harvesting and Re-Use: A Tool for Stormwater Runoff Reduction. Professional Development Series. Available at: http://www.conteches.com/
  13. Krishna, H. (2003). An overview of rainwater harvesting systems and guidelines in the United States. Proceedings of the First American Rainwater Harvesting Conference; 2003 Aug 21-23; Austin (TX).
  14. Magno-Ballesteros, M. (2000). Land Use Planning in Metro Manila and the Urban Fringe: Implications on the Land and Real Estate Market. Philippine Institute for Development Studies.
  15. Majid, M. R. and Rusli, N. Site-scale Rainwater Harvesting: Potential Applications of Low-Impact- Development Techniques in Malaysia. Available at: http://www.academia.edu/attachments/3859691/download _ file. Accessed at: February 2012
  16. Meteorological Service Singapore. (MSS). Tropical Cyclone Classification. Available at: http://www.weather.gov.sg/ wip/pp/ssops/typhoon/tsclassification. Retrieved: February 2012.
  17. Morris, R. A. and Rumbaoa, Jr. F. M. (1985). Classification of Philippine Rainfall Patterns. IRRI Research Paper Series. (109).
  18. National Nutrition Council, NNC (2012). NCR Profile. Available at: http://www.nnc.gov.ph/index.php?option=com_k2&view=itemlist&task=category&id=89:ncr-profile
  19. Oni, S. I., Ege, E., Asenime, C., and Oke, S. A. (2008). Rainwater Harvesting Potential for Domestic Water Supply in Edo State. Indus Journal of Management & Social Sciences. 2(2), pp. 87-98.
  20. Patra, A. D. and Gautam, S. (2011). A pilot scheme for rooftop rainwater harvesting at Centre of Mining Environment, Dhanbad. International Journal of Environmental Sciences. 1(7). pp. 1542-1548.
  21. Philippine Atmospheric Geophysical, Services Administration (PAGASA). (2011). Science Garden Compound, Agham Road, Diliman, Quezon City, Philippines.
  22. Ragragio, J. M. Urban Slums Reports: The case of Manila, Philippines (2003). Available at: http://www.ucl.ac.uk/ dpu-projects/Global_Report/pdfs/Manila. pdf
  23. U. S. Environmental Protection Agency (U.S. EPA). (2012). Climate Change Indicators in the United States. Available at: http://epa.gov/climatechange/ indicators/pdfs/ ClimateIndicators_full.pdf Retrieved at: January 2012.
  24. United Nations Environment Programme (UNEP). Rainwater Harvesting and Disaster Management. Rainwater and the MDGs Booklet. Available at: http:// www.unep.org/ pdf/RWH/disaster_management.pdf Retrieved: February 2012
  25. Worm, J. and Hattum, T. V. (2006). Rainwater Harvesting for Domestic Use. pp. 12-13
  26. Zoleta-Nantes, D.B. (2000). Flood Hazards in Metro Manila: Recognizing Commonalities, Differences, and Courses of Action. Social Science Diliman. p. 63