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

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-.J Table 8. SUmmaf'/l of yield losse. on the &ilt River Valk~ Water U.ers A..ocmtion lands due to increasing
f\) .aUnit'll of.rrigation water from the Central ANona Project and irrigation method as compared with
--J present water quaUty and be.t irrigation practice, projected on. the basis of 150, 000 acre feet per year
of CAP water and 1,050,000 acre feet of SRP water.
-..l T.D.S.
Total Dissolved SoUds In C.A.P. Water, mg/l
of 900 1100 1400
Crop Irrigations S.R.P.
Per Year Water T.D.S.1n C.A.P.. S.R.V.W.U.A. Blend
565 607 632 669
Alfalfa (fons) 16 460 1380 2300
43,655 Ac. 22 230 1380
29 690
Lettuce (Cartons) 16 3170 4120 6020 7920
750 Ac. 22 1270 2220 3640 6020
29 480 1270 2690 4590
35 950 2690
Onions (Tons) 16 15 82 212 149
945 Ac. 22 45 67 112
29 22 52 90
35 35 35
Grapefruit (Tons) 16 56 169 169 254
1,550 Ac. 22 21 70 169
29 35 106
35 35
Oranges and Tangerines (Tons) 16 99 161 297 446
3,090 Ac. 22 37 124 297
29 62 186
35 62
Carrots (Tons) 16 175 205 265 490
865 Ac. 22 115 145 190 265
29 75 115 160 220
35 20 60 115 160
Sprinkler

Table 4. Summaf'/l of yield lo.ses in the SRP supplemental area due to increasing saUnit'll of irrigation water
from the CAP blended into the SRP irrigation ''IIstem, and irrigation method as compared with pre.ent
water quaUt'll, and best irrigation practices.

T.D.S. T.D.S. in C.A.P. Water, mg/l
of
Irrigations S,R.P. 900 1100 1400
Per Year Water T.D.S. in C.A.P. - S.R.P. Blend, mg/l
565
607 632 669
16 30.0 91.0 152.0
22 15.0 91.0
29 46.0

Crop

Alfajfa (fans)
2,560 Ac.

pumpage is 160,000 ac ft with an average TDS of 1,800
mg/l. If they were allotted 40,000 ac ft of CAP water,
they could eliminate some of their worst wells which
with the CAP water would Improve their water
quality at least until the CAP water reaches 1,800
mg/I.Their blend would then go to 1,825 mg/I when
the CAP water reaches 1,400 mg/I.

The RID crop land is mostly well drained (85,000
acres well, 2,280 acres moderate, and 880 acrea poor)
and therefore would be little affected by the salinity of
CAP water. Yield losses, due principally to irrigation
methods, are summarized in Table 7.

San Carlos Project

The San Carlos Project encompasses 100,000
acres of Indian and non-Indian lands. The water
supply averages approximately 190,000 ac ft of surface
water and 75,000 ac ft of groundwater annually. This
irrigates, after system losses, approximately 50,000
acres with less than 4 feet of water per year. If they
were allotted 160,000 ac ft of CAP water and allowed
to pump 60,000 ac ft by lining the canals and laterals
they could irrigate approximately 80,000 acres with 4
feet of water per year.

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