WSP06476

• File Number: 8271.300
• Description: Colorado River Basin Salinity Control Program - General Information and Publications-Reports
• Basin: Colorado Mainstem
• Water Division: 5
• Date: 6/1/1978
• Title: Salinity Management Options for the Colorado River -- Part 1 of 2 -- Title Page - Page 168
• Water Supply Pro - Doc Type: Report/Study

Table 1. Summaf'/l of yield tollCB in the Gila and Yuma projects due to increasing saUnit'll of irrigation water
~~':) from the Colorado River and irrigation method as compared with present water quaUt'll and best
0 irrigation practice - thousand tons.
{'\;) Irrigations Total Dissolved Solids in Irrigation Water, mg/1
~ Crop
C::J Per Year 900 1000 1100 1200 1300 1400
CJl Cotton 16 0.10 0.29
19,880 Ac.
Alfalfa Hay 16 7.96 10.06 14.82 17.79 20.97 24.23
33,410 Ac. 22 5.87 7.96 9.89 12.83 15.82 18.80
29 5.03 6.92 8.80 10.73 13.83 16.65
35 3.77 5.24 6.92 8.38 10.48 12.41
Sprinkler 2.51 4.82 6.29 8.17 10.06 -
Lettuce 16 7.36 9.80 12.52 14.44 18.48 22.03
13,250 Ac. 22 4.73 6.85 9.08 10.84 14.62 19.05
29 3.84 4.73 7.74 9.39 13.18 16.37
35 2.80 4.05 5.39 7.08 10.22 13.31
Sprinkler 1.87 3.53 4.88 6.43 8.33
Cantaloupes 16 2.42 3.31 4.51 5.85 6.66 7.78
7,630 Ac. 22 1.69 2.42 3.16 3.82 4.87 5.89
29 1.32 2.06 2.79 3.38 4.23 5.16
35 0.88 1.47 2.06 2.64 3.38 3.96
Sprinkler 0.44 1.25 1.83 2.50 3.23
Wheat 16 0.18 0.54 0.84 1.20 1.56
29,060 Ac. 22 0.12 0.48 0.72 1.02
29 0.24 0.54 0.84
35 0.24 0.48
Sprinkler 0.18
Grain Sorghum 16 0.06 0.19 0.32 0.43 0.56 0.71
12,130 Ac. 22 0.06 0.17 0.26 0.39 0.50
29 0.11 0.20 0.32 0.43
35 0.09 0.20 0.30
Sprinkler 0.07 0.19
Grapefruit 16 0.06 0.13 0.23 0.33 0.44 0.53
2,300 Ac. 22 0.G7 0.13 0.21 0.30
29 0.02 0.G7 0.14 0.21
35 0,02 0.G7
Oranges and Tangerines 16 0.21 0.47 0.65 1.20 1.67 1.96
17,600 Ac. 22 0.26 0.47 0.78 1.64
29 0.08 0.26 0.52 0.78
35 0.08 0.26
Lemons 16 0.39 0.88 1.62 2.26 3.04 3.68
10,700 Ac. 22 0.49 0.88 1.47 2.06
29 0.15 0.49 0.98 1.47
35 0.15 0.49

districts supplied by the Salt River and San Carlos
projects, and for one small independent district which
is supplied entirely from groundwater.

Sal.t River Project

In 1973 the SRP supplied full irrigation service to
120,136 acres of Salt River Valley Water Users
Association crop land, and supplemental irrigation to
16,249 acres of crop land outside of the SRVWUA
under special contracts. In addition to this service, 5.6
percent of the surface water diverted at Granite Reef

Dam went to the Roosevelt Water Conservation
District which irrigated 28,188 acres.

The average annual flow of the Salt and Verde
Rivers is approximately 850,000 ae It with an average
quality of 467 mg/l TDS. Average annual ground.
water pumpage is approximately 200,000 ae It with an
average quality of 960 mg/I TDS. The normal SRP
water supply, therefore, is approximately 1,060,000 ac
It with an average TDS of 565 mg/I. If the SRP were
given an annual allotment of 150,000 ac It as the
Colorado River salinity increased from the current 775
ml\l/I above Parker Dam to about the expected 1,200
mg/I, the resulting CAP.SRP blend would go from 591
mg/I to 660 mg/I TDS.

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