Pilot and Demonstration Activities
Operational Research on Decentralized Wastewater Management & its Dissemination
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Kathmandu Valley in Nepal suffered from a chronic shortage of drinking water, while its rivers were fast turning into sewer canals. This PDA demonstrated appropriate technologies for managing domestic wastewater, recycling, and optimizing water at household levels in Kathmandu.
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| PDA SNAPSHOT |
| Project Site |
Kathmandu Valley, Nepal |
| Cost Estimate |
$45,000 |
| Status |
Completed |
| Approval Date |
2003/05/28 |
| Completion Date |
30 October 2005
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| Category |
Urban Services |
| Type |
Public Awareness |
| Proponents |
Keiichi Tamaki, South Asia Department |
| Partner |
Environment and Public Health Organization |
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BACKGROUND
 Chronic shortage of drinking water and turning of all rivers into sewer canal are among the
big problems in Kathmandu Valley. While several studies on water optimization and
wastewater management have been proposed, few have been implemented to date. Also,
the plans and programs implemented in the past were centralized and large-scale, hence,
local authorities could not implement them.
Local authorities should be responsible for improving their environment. One means of
doing this would be to introduce projects that involve local communities, thereby promoting
sustainability and reducing capital investment. Demonstration projects that serve as
operational research and awareness-building platforms should be launched.
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OBJECTIVES
- Demonstrate appropriate technologies for managing domestic wastewater, recycling the nutrient, and optimizing water at household level
- Improve environmental and health conditions, especially of the urban poor
- Reduce pollution of the natural environment
- Provide opportunities for generating economic benefits from reuse and recycling
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EXPECTED RESULTS
- Introduction of appropriate technologies for community scale waste and wastewater management
- Increased public participation in the implementation of the new technologies
- Increased household awareness, knowledge and skills re: water optimization and waste recycling technique
- Dissemination of all techniques at national and regional level
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REPORT CARD
This PDA was completed on 30 October 2005. Read the Final Report .
This PDA
- Successfully demonstrated water optimizing techniques, such as rainwater harvesting techniques, reed bed treatment systems, and proper use of Ecosan toilets. These techniques help to reduce water demands.
- Increased awareness on water optimization. Agencies such as the Department of Urban Development and Building Construction (DUDBC) and the Nepal Water Supply Corporation (NWSC) have installed their own rainwater harvesting system. Nepal Water Supply Corporation (NWSC) produced an informational flyer on the rainwater harvesting system and sent it with the water bill to every household.
- Propelled rainwater harvesting into the national agenda.
- Developed a model reed bed treatment system at Thimi.
- Produced public awareness and education materials, including “Jalpari”—a short film on water optimization which aired on Nepal Television. The film received a lot of coverage from the Nepalese press and a private company has proposed to market the film.
- Developed a new Ecosan toilet design which has now gained popularity in Siddhipur, where ENPHO plans to expand the project.
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REPORTS AND RELATED DOCUMENTS
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Topics 
Operational Research on Decentralized Wastewater Management & its Dissemination
