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Yonghwan Kim

Water Safety Conference 2010. Yonghwan Kim. The potential for using rainwater to provide safe drinking water in rural areas: a case study of Cukhe Village, Vietnam. Contents. 1. Introduction. 2. Installation. 3. Conclusion. 4. Suggestion. Water Safety Conference

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Yonghwan Kim

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  1. Water Safety Conference 2010 Yonghwan Kim The potential for using rainwater to provide safe drinking water in rural areas: a case study of Cukhe Village, Vietnam

  2. Contents 1 Introduction 2 Installation 3 Conclusion 4 Suggestion Water Safety Conference November 2-4 2010, Kuching, Malaysia

  3. 1. Introduction Water Safety Conference November 2-4 2010, Kuching, Malaysia

  4. “Rain For All” Activity RWH installation with local people & Curtural exchange between Korea and Vietnam Water Safety Conference November 2-4 2010, Kuching, Malaysia

  5. Cukhe Village • Poor village in rural area • No centralized Water supply • 3 water resources - Surface water, Ground water, Rainwater • Surface water Hanoi, Vietnam Pollution from domestic sewage 12km • Ground water Nhue river Cukhe Village Arsenic contaminated Water Safety Conference November 2-4 2010, Kuching, Malaysia

  6. Potential of Rainwater • Quality • Except for turbidity, all the chemical substances tested satisfy the Vietnam water quality standards. • → We can drink rainwater after boiling. • Quantity • Abundant annual rainfall : 1,633 mm • (Global average : 880 mm) Water Safety Conference November 2-4 2010, Kuching, Malaysia

  7. Sustainability of RWH • Traditional water supply option • Half of households already using RWH • Low installing & maintaining cost • Require low energy Social Economy Sustainable Environment • Low effect on environment • No chemical added to rainwater Water Safety Conference November 2-4 2010, Kuching, Malaysia

  8. Object RWH has potential for drinking water supply alternative • To check problems in existing RWH • To suggest technical improvement for water quality treatment • To confirm quantitative feasibility of RWH system Promote RWH as a major drinking water supply Water Safety Conference November 2-4 2010, Kuching, Malaysia

  9. 2. Installation Water Safety Conference November 2-4 2010, Kuching, Malaysia

  10. Existing Rainwater Tank Catchment Gutter Pipe Storagetank Water Safety Conference November 2-4 2010, Kuching, Malaysia

  11. Existing Rainwater Tank • Without filtering system → Containing many particles • Unsealed Rainwater Tank →Exposed to dust, sunlight, and insect • Water shortage during dry season Water Safety Conference November 2-4 2010, Kuching, Malaysia

  12. Quality treatment • Catchment • Polyethylene • Portable Catchment • (3m(w) × 3m(l)) Asbestos - Harmful material • Filter • Sedimentation tank • 0.5mm sieve • Removing • large particles • such as leaves • Calm-inlet pipe • → Preventing disturbance of • settled part icle • → Reducing kinetic energy • Removing small particles • Storage tank • Plastic material designed for drinking purposes • Isolating rainwater from external environment • → Long term storage is possible Water Safety Conference November 2-4 2010, Kuching, Malaysia

  13. Quality treatment Case 1. Roof catchment Case 2. Portable catchment Catchment area : 21 m 2 Tank capacity : 2 t Catchment area : 9 m 2 Tank capacity : 2 t Water Safety Conference November 2-4 2010, Kuching, Malaysia

  14. Quantity management • Sufficient capacity storage tank • Concerning precipitation and demand : Capacity → 2t • Separate use of drinking water and domestic water Ground water Rainwater Water for domestic use such as wash, shower, cleaning Water for drinking and cooking Water Safety Conference November 2-4 2010, Kuching, Malaysia

  15. 3. Conclusion Water Safety Conference November 2-4 2010, Kuching, Malaysia

  16. Conclusion 1. Existing rainwater tank satisfy quality except for turbidity. There is quantity problem in dry season. 2. Installing RWH with proper catchment, filter and sedimentation tank improves water turbidity. Residents feel safe drinking rainwater after boiling. 3. Using rainwater only for drinking and cooking make it possible to supply rainwater throughout the year. 4. RWHs can play an important role in providing a sustainable water resource andresolving water problem over the world Water Safety Conference November 2-4 2010, Kuching, Malaysia

  17. 4. Suggestion Water Safety Conference November 2-4 2010, Kuching, Malaysia

  18. One Company One Rainwater Tank Hailuu elementary school Hailuu elementary school Bottled water for each class (780 USD per year) Made by local people 5,000 USD From company Finished fine shape RWH Technical assistance Water Safety Conference November 2-4 2010, Kuching, Malaysia

  19. First user is best user Let’s make world that everyone feel happy Water Safety Conference November 2-4 2010, Kuching, Malaysia

  20. Thank you! Water Safety Conference November 2-4 2010, Kuching, Malaysia

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