Map of Current Water System (section relevant for EWB-MAP modifications)

RED lines – supply lines to tank (uphill by pump)BLUE lines – distributions lines by gravity

DOWNHILL

Proposed update to Water System (section relevant for EWB-MAP modifications)

RED lines – supply lines to tank (uphill by pump)BLUE lines – distributions lines by gravity

NEW

SUP

PLY

LIN

E 1

NEW DISTRIBUTION LINE 2c

NEW DISTRIBUTIO

N

LINE 2a

NEW

DI

STRI

BUTI

ON

LI

NE

2bNEW TANK

A

B

C

D

E

F

DOWNHILL

Piping System LayoutNew Pipelines

• Supply Line 1 to new tank (A-B-C)– Length = 365 m + tank connection (assume +

10 m) = 375 m– 1 bend, 1 tee, 3 elbow, 2 valves, 1 exit– 17 m elevation rise + tank height– Hill rises to 643 m then valley falls t0 640 m

on connecting road (D-B)– ~175 gpm flowrate

• Distribution line connection 2a from lower Tramo 3b to lower Tramo 6 (E-F)

– 105 m length, elevation change unclear, guess 10 m drop

• Distribution connection 2b from upper Tramo 3b to upper Tramo 6 (B-D)

– 120 m length, 8 meter drop with low point at 640 m (3 m below D)

• Distribution line 2c from new tank to new connections (C-B-E)

– 255 m length, 11 meter elevation drop

WaypointsPoint Location Elevation

A Calle Principal 638 m

B Intersection at Field

651 m

C New tank 655 m

D End of upper Tramo 6

643 m

E End of lower Tramo 3b

640 m

F End of lower Tramo 6

?? Guess 630 m

Proposed update to Water System (section relevant for EWB-MAP modifications)

RED lines – supply lines to tank (uphill by pump)BLUE lines – distributions lines by gravity

NEW

SUP

PLY

LIN

E 1

NEW TANK

A

B

C

105 m

20 m

240

m

DOWNHILL

Estimate of head losses in supply pipe 1 (smooth PVC)

4” PVC sufficient to keep major and minor losses to >10% of the elevation change

Item 1" 1-1/4" 1-1/2" 2" 2-1/2" 3" 3-1/2" 4"D_pipe (in) 1.029 1.36 1.59 2.047 2.445 3.042 3.521 3.998D_pipe (m) 0.026 0.035 0.040 0.052 0.062 0.077 0.089 0.102A (m^2) 5.37E-04 9.37E-04 1.28E-03 2.12E-03 3.03E-03 4.69E-03 6.28E-03 8.10E-03A (cm^2) 5.37 9.37 12.81 21.23 30.29 46.89 62.82 80.99V (m/s) 20.50 11.74 8.59 5.18 3.63 2.35 1.75 1.36Re 5.36E+05 4.05E+05 3.47E+05 2.69E+05 2.26E+05 1.81E+05 1.57E+05 1.38E+05f 0.0117 0.0125 0.0130 0.0139 0.0145 0.0153 0.0159 0.0164

h_L major (m) 3593.8 955.5 454.9 137.0 58.9 20.9 10.4 5.7h_L minor (m) 267.7 87.7 47.0 17.1 8.4 3.5 2.0 1.2h_L major (% of z) 4667.3% 1240.9% 590.8% 177.9% 76.5% 27.1% 13.5% 7.4%h_L minor (% of z) 347.6% 113.9% 61.0% 22.2% 10.9% 4.6% 2.5% 1.5%

Assumptions for Supply Pipe 1 Calculation

Flow 175 gallons/min

Flow 0.011 m3/shttp://www.engineeringtoolbox.com/flow-units-converter-d_405.html

mu 0.001 Ns/m2

http://www.engineeringtoolbox.com/water-dynamic-kinematic-viscosity-d_596.html

rho 1000 kg/m3roughness 0Length 375 m

sum K_L fittings 12.48conservative estimate: 5 90 elbow, 1 45 elbow, pipe exit, 2 open valves

Pump-to-Tank Elevation Change77 m

636638640642644646648650652654656

0 50 100 150 200 250 300 350

Elev

ation

(m)

Distance from Connection to Main Supply Pipe (m)

Profile of New Supply Pipe

ElevationA

B

C

105 m

240 m

D

638 m640 m

643 m

651 m

Elevation:640 m

655 m

Supply Pipe 1 Pipe Profile NEW TANK

Tee connect

to 6” pipe

Gate Valve

45° Elbow

90° Elbow with

anchorGate Valve

90° Elbow

90° Elbow

Pipe Exit

PIPE FITTINGS

Tee with Manual Air release valve

Tee with Manual drain valve

Road Crossing

Road Crossing

Supply Pipe 1 Trenching• Based on recommendations from EWB Water Resource Guidelines

and advice from Tony Sauder:– 70 cm trench depth with pipe buried below 50 cm– 10 cm bedding (2-12 mm soil) if stones/rocks present in trench– Back-fill with soil that is free of lumps, from stones (>3 cm), and from

organic matter– PVC pipe joined in trench and cure for >10 hr prior to pressurizing. Keep

joints exposed to check for leaks– For road crossing, bury PVC pipe inside steel or concrete pipe (ID > diameter

of PVC joints) and bury at same depth as standard trench

70 cm trench depth

10 cm bedding

10 cm

50 cm

Valve Boxes

• Design options– Obtain pre-cast valve boxes with lockable lids locally – Build from bricks and mortar with metal lids

• Specifications– 4” Pipe centered about 55 cm below ground level– Box should extend 10 cm above ground level– Internal dimensions roughly 45cmx45cm– Place support under valve

Photos of current valve boxes installed in Las Delicias

Design of Valve Boxesfrom a prior EWB project

Adjust Dimensions based on local conditions• For Single 4” pipe

Thrust Anchors for Elbows &Tees

From Russ Turner, Tetratech

Thrust Anchor DimensionsBased on• 4” PVC PIPE• 50 cm Trench Depth

Height of Anchor 25 cm

Length of Anchor Backing against undisturbed material:• 90° BEND: L = 80 cm• 45° BEND: L = 40 cm• Tee: L = 40 cm

Additional Fittings for Supply Pipe 1

• At high point of supply pipe 1 at point D– Install tee with small diameter ball valve to release air

trapped in line– Instruct water system operator to open air release valve

briefly at least once every three months while pump is operating

• At low point of supply pipe 1 between points D and B– Install tee with small diameter ball valve and pipe to drain

water and remove sediments from pipe– Instruct water system operator to open drain valve briefly (5

minutes) at least once every three months while pump is operating to eject water and clear sediments

Supply Pipe 1 Materials List• 4” PVC pipe (Schedule 40) in 6 m lengths – 62 pieces• 4” PVC 45° Elbow – 1 piece• 4” PVC 90° Elbow – 1 piece• Tee connector & Adapter from 6” PVC main to 4” branch line – 1 piece• PVC primer, PVC cement, applicators, and cleanup• Gate/Ball valves (PVC or steel ?) – 2 pieces• Bed material for trench (2-12 mm), if necessary• Fill material, if necessary• Concrete for Anchoring Piping at Bends• Brick for Valve boxes • Mortar for valve boxes• Lids for valve boxes• Tools for cutting, de-burring, connecting pipe, mixing concrete• Tools for digging trench

EPA-NET Simulation for Supply Line 1 Matches Excel Calculations

1

2

3

4

5

6

1

2

3

4

76

5

WELL PUMP

TANK

LOW POINT

BRANCH POINT

Head

25.00

50.00

75.00

100.00

ft

DOWNHILL

Design of Distribution lines 2a, 2b, 2c

• See following map of community and assessment of change in number of homes served by tanks in current and proposed water system

• During implementation trip, the EWB team will connect Tramo 6 to the New Tank (points D-B-C) with 2” PVC pipe in same trench as new supply pipe and gather data about flowrates supplied to homes from new tank

• The EWB team plans to use EPANet software to model distribution to households and assess needs for altered pipe sizes after gathering flowrate data supplied by new tank

Proposed update to Water System (section relevant for EWB-MAP modifications)

RED lines – supply lines to tank (uphill by pump)BLUE lines – distributions lines by gravity

NEW

DI

STRI

BUTI

ON

LI

NE

2bNEW TANK

B

C

D

DOWNHILL

Supply Pipe 1 Materials List

• 2” PVC pipe (Schedule 40) in 6 m lengths – 26 pieces• 2” PVC 90° Elbow – 1 piece• PVC primer, PVC cement, applicators, and cleanup• Gate/Ball valves (PVC) – 2 pieces• Bed material for trench (2-12 mm), if necessary• Fill material, if necessary• Brick for Valve boxes • Mortar for valve boxes• Lids for valve boxes• Tools for cutting, de-burring, connecting pipe, mixing concrete• Tools for digging trench

DOWNHILL

Map of current Las Delicias Water System from ADESCO with approx house locations indicated

Summary of Existing Water SystemOVERALL COMMUNITY OF LAS DELICIAS CURRENT FROM TANK 1 CURRENT FROM TANK 2 CURRENT FROM TANK 3# homes = 584 430 Assumptions # homes = 291 # homes = 33 # homes = 260# people = 2628 1935 4.5 people/house # people = 1310 # people = 148.5 # people = 1170Demand gal/day 65,700 48,375 25 gal/day Demand gal/day 32,738 Demand gal/day 3,713 Demand gal/day 29,250

175 gal/min pump rate Tank Volume 35,000 Tank Volume 11,000 Tank Volume 25,000 time to fill (h) 3.33 time to fill (h) 18 time to fill (h) 2.38 from well from spring from well

OVERALL in 2011 from 2007 map Supplied by Tanque 1 Supplied by Tanque 2 Supplied by Tanque 3TRAMO # # Homes in

2011# Homes in 2007 from

map

Demand gallons

2011

Pipe Diameter

inches

Distance from map

meters

Supplied by Tanque # on map

via

TRAMO # from Tank 1

# Homes3 TRAMO # from Tank 2

# Homes5 TRAMO # from Tank 3

# Homes7

1 upper 15 22 1688 2 311 1 1 upper 15 0 01 lower 8 900 2 710 1 1 upper 1 lower 8 0 02 48 51 5400 2 546 1 1 upper 2 48 0 02a 7 6 788 1 137 1 2 2a 7 0 02b 25 27 2813 2 421 1 2a 2b 25 0 02c 9 8 1013 1 144 1 2 2c 9 0 03 42 37 4725 2 140 1 2 & 1 lower? 3 42 0 03a 40 46 4500 1.25 298 1 3 3a 40 0 03b 18 9 2025 1.25 160 1 3 3b 18 0 06 upper 37 29 4163 2 144 1 CallePrin Upper 6 upper 37 0 06 lower 0 1 492 1 6 lower 0 0 06a 6 6 675 1 226 1 6 6a 6 0 010 17 16 1913 1.25 130 1 CallePrin Upper 10 17 0 011 19 14 2138 1 342 1 CallePrin Lower 11 19 0 04 13 4 1463 1 90 2 0 4 13 05 20 21 2250 2 979 2 0 5 20 07 upper 16 42 1800 2 429 3 0 0 7 upper 167 lower 42 4725 2 572 3 7 upper 0 0 7 lower 428 10 14 1125 1 362 3 7 upper 0 0 8 109 18 18 2025 2 455 3 7 lower 0 0 9 189a 2 1 225 0.5 125 3 9 0 0 9a 29b 7 9 788 1 236 3 9 0 0 9b 712 10 9 1125 1 232 3 CallePrin Lower 0 0 12 10Calle Prin Upper 22 41 2475 2 468 3 7 lower 0 0 Calle Prin Upper 22CallePrin Lower 32 3600 2 377 3 CallePrin Upper 0 0 CallePrin Lower 32NewNW 57 6413 3 CallePrin Lower 0 0 NewNW 57NewSW 44 4950 3 CallePrin Lower 0 0 NewSW 44

260 Homes Served by Tanque 3

33 Homes Served

by Tanque 2291 Homes Served by Tanque 1

Current Water Distribution System

DOWNHILL

Modified water systemOVERALL COMMUNITY OF LAS DELICIAS PROPOSED FROM NEW TANK ADJUSTED FROM TANK 1 ADJUSTED FROM TANK 3# homes = 584 430 Assumptions # homes = 280 # homes = 154 # homes = 117# people = 2628 1935 4.5 people/house # people = 1260 # people = 693 # people = 526.5Demand gal/day 65,700 48,375 25 gal/day Demand gal/day31,500 Demand gal/day 17,325 Demand gal/day 13,163

175 gal/min pump rate Tanks Volume 28,600 Tank Volume 35,000 Tank Volume 25,000 time to fill (h) 2.72 time to fill (h) 3.33 time to fill (h) 2.38 from well from well from well

OVERALL in 2011 from 2007 map WITH CONNECTION "B" Supplied by Tanque 1 Supplied by Tanque 3TRAMO # # Homes in

2011# Homes in 2007 from

map

Demand gallons

2011

Pipe Diameter

inches

Distance from map

meters

Supplied by Tanque # on map

via

Accessible?2

Tramo from

New with B

# Homes2 Tramo #2 Homes Tramo #3 Homes2

1 upper 15 22 1688 2 311 1 0 1 upper 15 0 01 lower 8 900 2 710 1 1 upper 0 1 lower 8 0 02 48 51 5400 2 546 1 1 upper 0 2 48 0 02a 7 6 788 1 137 1 2 0 2a 7 0 02b 25 27 2813 2 421 1 2a 0 2b 25 0 02c 9 8 1013 1 144 1 2 0 2c 9 0 03 42 37 4725 2 140 1 2 & 1 lower? 0 3 42 0 03a 40 46 4500 1.25 298 1 3 Yes 3a 40 0 0 0 03b 18 9 2025 1.25 160 1 3 Yes 3b 18 0 0 0 06 upper 37 29 4163 2 144 1 CallePrin Upper Yes 6 upper 37 0 0 0 06 lower 0 1 492 1 Yes 6 lower 0 0 0 0 06a 6 6 675 1 226 1 6 Yes 6a 6 0 0 0 010 17 16 1913 1.25 130 1 CallePrin Upper Yes 10 17 0 0 0 011 19 14 2138 1 342 1 CallePrin Lower Yes 11 19 0 0 0 04 13 4 1463 1 90 2 0 0 0 0 05 20 21 2250 2 979 2 0 0 0 0 07 upper 16 42 1800 2 429 3 0 0 0 7 upper 167 lower 42 4725 2 572 3 7 upper 0 0 0 7 lower 428 10 14 1125 1 362 3 7 upper 0 0 0 8 109 18 18 2025 2 455 3 7 lower 0 0 0 9 189a 2 1 225 0.5 125 3 9 0 0 0 9a 29b 7 9 788 1 236 3 9 0 0 0 9b 712 10 9 1125 1 232 3 CallePrin Lower Yes 12 10 0 0 0 0Calle Prin Upper 22 41 2475 2 468 3 7 lower 0 0 0 Calle Prin Upper 22CallePrin Lower 32 3600 2 377 3 CallePrin Upper Yes CallePrin Lower 32 0 0 0 0NewNW 57 6413 3 CallePrin Lower Yes NewNW 57 0 0 0 0NewSW 44 4950 3 CallePrin Lower Yes NewSW 44 0 0 0 0

117 Homes Served by Tanque 3

33 Homes Served

by Tanque 2

154 Homes Served by Tanque 1

Proposed Water Distribution System

280 Homes Served by New Tank

DOWNHILL

Summary of potential changes in water distribution system

CURRENT SYSTEM• Storage

– Tanque 1: 35,000 gal– Tanque 2: 11,000 gal– Tanque 3: 25,000 gal

• Pump supplies water to Tanques 1 & 3 at 175 gpm, ~3 days per week

• Spring supplies water to Tanque 2 (and other tanques)

• Homes serviced by Tanques1. 2912. 333. 260

PROPOSED MODIFICATION• Storage

– Tanque 1: 35,000 gal– Tanque 2: 11,000 gal– Tanque 3: 25,000 gal– New Tank: 28,600 gal

• Current 65 HP Pump supplies water to Tanques 1 & 3 at 175 gpm

• New pump supplies water to new tank at 175 gpm with much lower head

• Homes serviced by Tanques1. 1542. 333. 117New: 280

New tank reduces demand of water from Tanques 1&2 (which require high head) by roughly 50%