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Las Delicias, Las Delicias, El SalvadorEl Salvador
Water Supply Water Supply ProjectProject
Current Project Status, January 2010Richard Cairncross & David Haussler
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Presentation OutlinePresentation Outline
• Overview of Las Delicias Community
• The Need for an Improved Water Supply System
• The EWB Process
• Preliminary Assessment Trip – July 2009
• Design Options
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Las Delicias, El SalvadorLas Delicias, El Salvador
Las Delicias
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Las Delicias, El SalvadorLas Delicias, El Salvador• Community Facts
– ~600 homes, 3000 residents– 15 miles NW of San Salvador– On Western Slopes of Volcan San
Salvador– Homes Spread Out, but Las Delicias is
Bordered by Several Similar Communities
– Water Storage & Piping System installed 20 years ago With Water Delivery by Truck
– Well and Pump Installed < 5 years ago– Residents are Poor (<$10/week
income)– Community Well-Organized through
Adesco and local NGO– Able to spend about $5 per household
on water each month
Project History • Project FIAT has been active in Las Delicias for > 5 years• Initial Contact with Project FIAT
January 2009• Application to EWB-USA
March 2009• Project Approved
May 2009• Preliminary Assessment Visit
July 2009• Assessment Trip
April 2010
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The ProblemThe Problem: Water Supply : Water Supply in Las Delicias is:in Las Delicias is:
• Unreliable
• Inequitable
• Questionable Quality
A Culture of Scarcity exists that leads to hoarding
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A process to achieve a goal.A process to achieve a goal.
• Goal: Provide clean potable water to everyone in the community of around 5000 people.
• Identify Challenges & Evaluate Options to reach the goal.
• Gather an appropriate team.
• Evaluate design alternative and Develop an implementation plan.
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Las Delicias Project History• Initial Contact with Project FIAT
• January 2009• Application to EWB-USA
• March 2009• Project Approved
• May 2009• Preliminary Assessment Visit
• July 2009• Assessment Trip
• April 2010
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San Salvador
Project FIAT Guest House
Preliminary Assessment Trip Preliminary Assessment Trip to Las Delicias, July 2009to Las Delicias, July 2009
Las Delicias
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Three Days Exploring Las Delicias Three Days Exploring Las Delicias Water SystemWater System
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Las Delicias Community Map with Piping System
• Pump Runs 6 Hours a day. • Pump puts out about 150
GPM.• Depending on the time of year
pump will run a max. of 5 days
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Flow testFlow test Tank Flowrate Calculations
Tank Tank 1 Tank 3D (m) 6.48 6.65H (m) 3.73 3.58A (m2) 32.95 34.78V (m3) 123.02 124.52
delta t (min) 15.25 11.00delta L (m) 0.20 0.13Flow (m3/min) 0.44 0.40Flow (gal/min) 115.99 106.10
** Tank 1 was receiving flow by gravity from mountain during pump test
• Meter at well-head indicated about 150 GPM
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Meeting with Community CouncilMeeting with Community Council
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Assessment Trip to Las Delicias Assessment Trip to Las Delicias Planned for Spring 2010Planned for Spring 2010
GOALS of Assessment Trip
• Evaluate failure of well riser pipe to improve design and reduce frequency of replacements.
• Evaluate spring source and supply lines between spring and storage tanks to determine potential for increasing yield.
• Measure water quality indicators at several source points (well source, spring source)
• Discuss design options with community such as point-of-use water treatment systems, water meters, automatic water shut-off valves on household pilas.
• Initiate community health assessment.• Meet with engineers who installed well or water
authorities to find well information. Determine local codes and identify regulatory agencies.
• Measure elevations of critical distribution points in water system.
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EWB impacts their lives EWB impacts their lives
• Provides professional resources to help resolve problems facing poor communities in developing countries.
• EWB members dedicate their TIME and skills.
• Have a genuine concern for their neighbors.
• Have said yes to a call for help.
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Las Delicias Pre-Assessment Las Delicias Pre-Assessment SummarySummary
• Pumps, piping, and storage systems are operational• Distribution of water to households is inequitable
– Some houses receive water daily– Others receive water once per week– A culture of scarcity exists leading to hoarding water when
it is available• Chlorine treatment occurs on effluent from storage
tanks• Anecdotal evidence of pipe failures
– Corrosion of pipes in well– Failure of unions in PVC at high flowrates– Old pipes are “brittle”
• Community financial system is well established