Site Assessment Waslala, Nicaragua

Villanova University
College of Engineering
Jordan Ermilio
Senior Design Seminar
ME 4800
Community Water Supply
Waslala, Nicaragua
Lecture 1: Introduction and
Water System Design
Components
Waslala
Joe Dietzel
James O’Brien
Dr. Jones
Jordan Ermilio
Nora Pillard
Site Assessment
Municipality of
Waslala
Area
1,291 Sq.km
498.5 Sq.Miles
Population
Waslala Central
8,000 People
Waslala
Villages
30,000 People
Villages with Water Systems
Villages with out Water Systems
Rio Blanco
o
N13 10’ 03”
o
W83 12’ 10”
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Service Learning Trip Objectives (Spring 06)
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Identify Senior Design Project Location.
Conduct Assessment Activities for 9 rural
villages.
Identify Local Issues Related to Project.
Assist Implementation of a Gravity Fed Water
Distribution System for a Rural Community.
Project Locations
Santa Rosa Dudu
El Triumpho
Santa Maria Kubali
El Garobo
Ocote Dudu
Boca de Piedra
El Instituto Agropecuari
El Cipres
El Guabo #2
Villages with Water Systems
Villages with out Water Systems
Santa Maria
Instituto
El Garobo
El Guabo
Waslala
El Triumpho
Rio Blanco
o
N13 10’ 03”
o
W83 12’ 10”
Water Supply System Components
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Source Development
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Groundwater
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Small Streams
Rivers
Lakes
Springs
Rainwater
Intake Line and Distribution
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Pipe Sizing to Optimize
Pressure Conditions
Large Pressure Head
Low Pressure Head
Hydraulic Grade Line
Water Treatment Systems
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Hand dug wells
Boreholes
Surface water
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Sedimentation
Filtration
Disinfection
Storage Tanks
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Sizing to meet peak demands
Sighting tank location for
optimal pressure
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Distribution System Design
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Branched Distribution Network
Looped Distribution Network
Collection Points
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Private Connections
Community Tapstands
Source: Qs = 0.33 lps 5.25 gmp
Supply = 28,512 liters/day, 7532 gpd
Demand = 10,000 liters/day; 200 people at 50 lpd
E = 498 meters
Node 2D: HH = 5
E = 265 m
Q = 0.2 lps
Dyn Head = 83.8 m
Pipe 1: 900m 25mm PVC
School
Node 2A: HH = 1
E = 360 m
Q = 0.2 lps
Dyn Head = 0.2 m
Node 2C: HH = 9
E = 290m
Q = 0.2 lps
Dyn Head = 59.3 m
Node 4B: HH = 5
E = 357 m
Q = 0.2 lps
Dyn Head = 9.1 m
Pipe 2: 200m 25mm PVC
Pipe 4: 50m, 25mm PVC
Reservoir
E = 367 m
Node 4A: S = 220
E = 360 m
Q = 0.2 lps
Dyn Head = 6.9 m
Pipe 3: 50m 25mm PVC
Node 3A: HH = 5
E = 345 m
Q = 0.2 lps
Dyn Head = 20.7 m
Node 2B: HH = 10
E = 290m
Q = 0.2 lps
Dyn Head = 60.3 m
Engineering Assessment
Nicaragua, Waslala
Arena Blanca
Date: March 3, 2004
Source Development
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Protecting Water
Quality
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Designating Protected
Watersheds
Surface Runoff
Contamination
Sediment Wash out
and O&M.
Pollutants
Clean water?
Components of a Fully Protected Source;
Gravity Spring Intake
Drainage Canal: Runoff Diversion
Fully Protected Cover
Access Cover and
Sediment Trap
Intake Line
Air Vent
Control Valve
Washout Valve
Permeable Backfill of
Large Stones
Reservoir Tanks
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Sizing for Future
Demands
Protecting the
Supply
Maintain Pressure
Intake Lines and Distribution Design
Low Pressure Head Availability
Engineering Assessment
Nicaragua, Waslala
El Guabo
Pressure head
¾” PVC intake pipe
Flow Rate
Dyn Head
Dyn Head
(lps)
(m)
(psi)
Source: Qs = 0.5 lps, 7.9 gpm
E = 273 meters
Pip
e1
: 90
0m
2
Reservoir
E = 255 m
5m
m
PVC
Using a 1.5” PVC
Intake Line
0.50
-109.9
-155.8
0.40
-66.6
-94.5
0.30
-31.7
-45.0
0.20
-5.5
-7.8
0.10
11.5
16.3
Q = 0.5 lps
Pressure Head
H = 13.6 m
= 19.3 psi
Profile from Source to Tank to Road
Hierba Buena (Spring Assessment 2005)
610
590
Elevation (m)
570
550
530
510
490
Ground Surface Elevation
470
450
0
127
145
742
763
839
Distance (m)
875
942
1065
1092
1111
Branched Distribution System
Source
Q = 2.4 liters/sec
Villanova University
Mechanical Engineering
Community Water Supply Project
El Triunfo
1" diam Intake Line
FOR DISCUSSION
PURPOSES ONLY
3" diam
Reservoir
V = 16,000 Liters
2" diam
1 1/2" diam
1" diam
3/4" diam
Current Water Distribution
El Triunfo
Waslala
Looped Distribution System
Source
Q = 2.4 liters/sec
Villanova University
Mechanical Engineering
Community Water Supply Project
El Triunfo
1" diam Intake Line
FOR DISCUSSION
PURPOSES ONLY
3" diam
Reservoir
V = 16,000 Liters
2" diam
1 1/2" diam
1" diam Loop
1 1/2" diam
1" diam Loop
Looped Water Distribution
El Triunfo
Waslala
Looped Distribution System with multiple sources
Source
Q = 2.4 liters/sec
Villanova University
Mechanical Engineering
Community Water Supply Project
El Triunfo
1" diam Intake Line
FOR DISCUSSION
PURPOSES ONLY
3" diam
Reservoir
V = 16,000 Liters
2" diam
1 1/2" diam
1" diam Loop
1 1/2" diam
1" diam Loop
Looped Distribution & Tank
El Triunfo
Waslala
Collection Points
Poor Drainage
Difficult Collection Point
Designing for Convenience
0.2 meters
1.0 meters
0.2 m
Contact Information
[email protected]
www.WaterForWaslala.org
Program Framework
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Goals:
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Improve the quality of living in rural communities of
Waslala, Nicaragua through appropriate and
sustainable water resource development.
Improve the educational experience of engineering
students by incorporating international development
projects into Villanova University’s Engineering
Curriculum.
Supporting Sustainability
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Establishing Water Associations
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Technical Training for Rural Technician
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Environmental Health Education