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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

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


Yonghwan kim

Contents

1

Introduction

2

Installation

3

Conclusion

4

Suggestion

Water Safety Conference

November 2-4 2010, Kuching, Malaysia


Yonghwan kim

1. Introduction

Water Safety Conference

November 2-4 2010, Kuching, Malaysia


Yonghwan kim

“Rain For All” Activity

RWH installation with local people & Curtural exchange between Korea and Vietnam

Water Safety Conference

November 2-4 2010, Kuching, Malaysia


Yonghwan kim

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


Yonghwan kim

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


Yonghwan kim

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


Yonghwan kim

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


Yonghwan kim

2. Installation

Water Safety Conference

November 2-4 2010, Kuching, Malaysia


Yonghwan kim

Existing Rainwater Tank

Catchment

Gutter

Pipe

Storagetank

Water Safety Conference

November 2-4 2010, Kuching, Malaysia


Yonghwan kim

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


Yonghwan kim

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


    Yonghwan kim

    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


    Yonghwan kim

    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


    Yonghwan kim

    3. Conclusion

    Water Safety Conference

    November 2-4 2010, Kuching, Malaysia


    Yonghwan kim

    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


    Yonghwan kim

    4. Suggestion

    Water Safety Conference

    November 2-4 2010, Kuching, Malaysia


    Yonghwan kim

    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


    Yonghwan kim

    First user is best user

    Let’s make world that everyone feel happy

    Water Safety Conference

    November 2-4 2010, Kuching, Malaysia


    Yonghwan kim

    Thank you!

    Water Safety Conference

    November 2-4 2010, Kuching, Malaysia


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