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CE 394K: GIS in Water Resources Small Dam in Village of Tlamacazapa , Mexico Robin Lynch

CE 394K: GIS in Water Resources Small Dam in Village of Tlamacazapa , Mexico Robin Lynch. Tlamacazapa , Guerrero. Remote mountain village Wells contaminated with: Arsenic, Lead, and Fecal Runoff Severe 6 month dry season Limited piped water (~2 hours/week). Wet Season. “Agua de Shrek”.

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CE 394K: GIS in Water Resources Small Dam in Village of Tlamacazapa , Mexico Robin Lynch

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  1. CE 394K: GIS in Water ResourcesSmall Dam in Village of Tlamacazapa, MexicoRobin Lynch

  2. Tlamacazapa, Guerrero • Remote mountain village • Wells contaminated with: Arsenic, Lead, and Fecal Runoff • Severe 6 month dry season • Limited piped water (~2 hours/week)

  3. Wet Season “Agua de Shrek”

  4. Dry Season (Same well)

  5. Goal of Project Create a dam to meet water needs • Delineate stream network • Determine best location for dam • Delineate watershed • Size the dam using Sequent Peak Method

  6. Stream Delineation Too far from road, difficult to maintain Perfect! Drains from village runoff, too polluted

  7. Watershed delineation Drainage Area = 7689600 m2 Dam

  8. Average Rainfall (2003-2007)

  9. Flow Calculation • Runoff ratio, w = 0.2 • Drainage Area, DA = 7689600 m2 • Q = P*DA*w • Calculated per month

  10. Water Demand • Calculate volume for 3 scenarios • Assume population of 6000 people ~2.5 flushes ~7 flushes ~17 flushes

  11. Dam Location

  12. Dam Sizing

  13. Sequent Peak Method Water Demand Evaporation Losses Inflow Minimum Capacity (m3)

  14. Dam Sizing

  15. Next Steps/Pitfalls • Geological survey • Community Participation • Clear organizational structure • Affordable pricing

  16. Questions?

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