WSPC02336

• File Number: 8272
• Description: Colorado River - Colorado River Basin Salinity Control Program - CRBSCP
• State: CO
• Basin: Colorado Mainstem
• Water Division: 5
• Date: 8/1/1993
• Author: DOI-BOR - BIA
• Title: Navajo Indian Reservation - Hogback-Upper Fruitland Canal - Ponding Tests and Seepage Rate Determinations
• Water Supply Pro - Doc Type: Report/Study

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Upper Fruitland Canal - Calculations of Seepage rates foc'ponding tests.

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Pond No.1
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OQ2037

525 ft

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a=t6ft

A = 1/2 (a+b)h
A = cross sectional area

.45 ft 2.15 ft
It- b =10 ft e=3 I---

Al = 112(16+ 10)2.45 = 31.85 ft2
VI =AI(L) =31.85(525)= 16,721 ft3
A2 = 112(15+10)2.15 = 26.88 ft2
V2 = A2(L) = 26.88(525) = 14,109 ft3
I1V = V I-V2 = 2,612 ft3

P w = b+ [ h2+c2] 1/2(2)
P w = wetted perimeter
Pwl = 10+ [2,452+3.02]112(2) = 17.75
Pw2 = 10+ [2.152+2.52] 112(2) = 16.59

Aw = wetted area = P w(L) Seepage = Ii V ft3/Avg. Aw ft2rfime (days)
Awl = Pwl(L) = 9,318.75 ft2
Aw2 = Pw2(L) = 8,709.75 ft2 Seepage = 2,612 ft3/9,OI4ft2/3days = 0.10 ftfday

Average Aw = 9,014 ft2 .
Seepage minus evaporation] = 0.10 ftfday - 0.01 ftfday - 0.09 ft/dav

Pond No.2

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1050 fl

a 16ft

c=3 I---

AI = 112(16+10)3,20 = 41.60 ft2
VI = A1(L) = 41.60(1050) = 43.680f13
A2 = 112(15+10)2.68 = 33.50 fl2
V2 = A2(L) = 33.50(1050) = 35,175 ft3
Ii V = V 1" V 2 = 8,505 ft3

Pwl = 10+ [3.202+3.02]112(2) = 18.77

P w2 = 10+ [2.682+2.52] 112(2) = 17.33

Awl = Pwl(L) = 19,708.5 fl2
Aw2 = Pw2(L) = 18,951 fl2
Average Aw = 18,951 ft2

Seepage = t:.V ft3/Avg. Aw ft2rrime (days)
Seepage = 8,505 ft3/18,951 ft2/3days = 0.15 ftfday
Seepage minus evaporation] = 0.15 ftfday - 0,01 ftfday = 0.14 ft/day

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] Evaportalion value from Water Use Prodution, Functions of Selected Agronomic
Crops in NW New Mexico.

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