experiences from the field: building a water distribution system in rural honduras ethan larochelle...
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Experiences from the Field: Building a Water Distribution System in Rural Honduras
Ethan LaRochelleNortheastern University Engineers Without Borders
Building a Better World, One Community at a Time
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Travel and Lodging
• Travel with Americans Caring Teaching and Sharing (ACTS)
• Accommodations• Local guides• Communication
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With water everything is possible.
Without water nothing is possible.~Dean Seibert, M.D. ACTS
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EWB by the Numbers
• 2001: EWB-USA founded
• 300 chapters• 12,000 members• 280 Projects in over
40 countries
• 2004: EWB-NEU founded
• 2005: EWB-NEU travels on first trip
• 5 successful trips• 118: Population of
Los Planes
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Los Planes: Spring 2006The Assessment
• Main water source from a stream 15 min. away
• A few houses receive a trickle for about 1 hour each day
• Both sources contaminated with coliforms
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Los Planes: Spring 2006The Assessment
• Water sample testing• Traditional surveying
works well for elevations– Establish benchmark
• Sub-meter accurate GPS is quick – Don’t rely on elevations
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Los Planes: Spring 2006The Assessment
• On average 6 people live in each home
• Villagers report going without food 2-3 days a week
• Very little variety in diet
• Malnutrition is a major problem
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Los Planes: Winter 2007ACTS Assessment Follow-up
• Keily Marisela Vieda 19mo female 14lbs.– Diagnosed with severe malnutrition, poor
growth, language delay and lower extremity flaccidity
• Many Villagers in poor health
• Report if they had more reliable water source they could grow a variety of vegetables
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Main Pipeline
Where We Need to Go
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Overall Feasibility
Profile View
Elevation: 2836 ft354 ft elevation difference
4.5 gpm,1.5” PVC, C = 80
Hazen-Williams headloss 55 ftWater Source: 4.5 gallons per minute
20 year demand projection: 5,645 gallons per day
Diurnal demand cycle
Los Planes: 2482 ft
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System Diagram
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Suspension Design
• 1.5” galvanized iron water pipe
• 5 mm steel cable (4,000 lb strength)
• 1.5” galvanized iron pipe for columns
• Concrete/soil footings
• Steel cable stirrups (calculated lengths)
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Design Process
• Excel Hazen-Williams water flow model• Multi-phase implementation• Phase 1
– Transmission pipe– Suspension river crossings– Break pressure tanks– Community tap stand
• Phase 2– Reservoir Tank– Distribution Network
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Los Planes: Spring 2007Phase 1 Implementation
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Los Planes: Spring 2007Phase 1 Implementation
Constructing a Bridge
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Los Planes: Spring 2007Phase 1 Implementation
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Los Planes: December 2007Phase 2 Implementation
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Recap of Implementations
• Phase 1 (Spring 2007)– Transmission pipe– Suspension river crossings (1of 2)– Break pressure tanks– Community tap stand
• Phase 2 (December 2007)– Suspension river crossings (2of 2)
• And “Blip”
– Reservoir Tank (Finalize location)– Distribution Network (Acquired materials)– Disinfected Line– Assessed previous work
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Los Planes: Spring 2008Phase 2b Implementation
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Los Planes: Spring 2008Phase 2b Implementation
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Los Planes: Spring 2008Phase 2b Implementation
Education
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Los Planes: Spring 2008Phase 2b Implementation
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Important Lessons Learned
• Consider arriving on a Thursday to allow shopping on Friday.
• Allow twice as much time as you think you'll need for everything. Allow more if the task involves conversation or other human interactions.
• Have another person check your work or calculations, especially if it is after 10:00 pm or before 6:00 AM.
• Bring large format pictures and drawings to show at the “kick off” meetings.
• Make lists of things to do and bring the night before.
• The most focused and productive meetings can occur while driving on bumpy roads before sunrise.
• The villagers are resourceful. And don’t need to be micromanaged.
• Use designs that feature easy construction.
• Always bring the PVC saw, duct tape, string and rope. The tree vice was crucial for working with GI
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Do Not Touch Animals
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Work With What You Have
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Additional Lessons Learned
• Don’t touch geckos, they may be scorpions.
• Avoid eye damage – wear sunglasses when riding in the back of the truck. Insects hurt at high velocities.
• Bolt cutters cut bolts, not cable.
• Buy more vegetables and canned fruit. Eat more vegetables and canned fruit.
• Always bring toilet paper in the field – Lempiras are not as absorbent.
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Paying For It All
• All trips are paid for through fundraising• Average cost is $10,000-15,000 depending on
size and type of trip• 50% is usually dedicated to airfare
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Fundraising• Donations
– Engineering Companies– Grants– Family and Friends
CIVILized Solutions
Smurfit-Stone Container Co.
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Questions?• Contact Information
– Ethan LaRochelle : EthanLaRochelle[AT]gmail[DOT]com
• For more information:– www.ewb.neu.edu
• Pictures and video:– www.ewbneu.smugmug.com
Thank you!