<br />to")
<br />l-
<br />e>
<br />.....
<br />
<br />TABLE 3 -- Drain. Salinity Data by Irrigation District,
<br />San Juan Salinity Control Study, Navajo Nation Unit
<br />
<br />.:fJ!jt~
<br />
<br />Canal
<br />
<br />Representative Drain Estimated Weighted
<br />Drain EC Acres EC
<br />45-3 2.0 210 2'.7
<br />45-7 4.8 1,160 on
<br /> 1.0 840 3,330
<br />45-12, 13, 13A 2.0 1,120 acres
<br />5S-3, 5, 6 3.2 1,560 2.3
<br />55-7, 25 1.9 585 on
<br />5S-10-12, 21-24 1.2 1,510 4,530
<br />55-14, 15 3.0 875 acres
<br />5S-31, 31a 1.2 540 1. 2 on
<br /> 540 acres
<br />
<br />Fruitland
<br />3,330 acres
<br />
<br />Hogback
<br />4,530 acres
<br />
<br />Cudei
<br />540 acres
<br />
<br />Weighted EC for all drains 2.4 on
<br />8,400 acres
<br />
<br />TABLE 4 -- Water and Salt Balance, Present Conditions and Future Without Project,
<br /> San Juan Salinity Control Study, Navajo Nation Unit (5,800 acres)
<br /> ------WATER------ -----------SALT----------~t3
<br /> --AF/A-- --AF/yr- --EC-- --T/AF-- -T/yr--
<br />DIVERSION 10.7 62,100 0.52 0.45 27,900
<br />RETURN TO RIVER (Off-farm)
<br />Canal Seepage(14%) 1.5 8,700 2.40 2.10 18,300
<br />FARM DELIVERY 9.2 53,400 0.52
<br />RETURN TO RIVER (Onfarm)
<br />Ditch Seepage 0.8 4,600 2.40 2.10 9,600
<br />FIELD DELIVERY 8.4 48,800 0.52
<br />VEGETATION USE
<br />Crop Consumptive Use 2.5 14,500
<br />Phreatophyte Use(10%) 0.6 3,500
<br />RETURN TO RIVER (Onfarm)
<br />Surface 1.7 9,900 0.52 0.45 4,500
<br />Deep Percolation 3.6 20,900 2.40 2.10 43,900
<br />RETURN SUMMARY
<br />Canal Seepage 1.5 8,700 2.40 2.10 18,300
<br />Ditch Seepage 0.8 4,600 2.40 2.10 9,600
<br />Surface 1.7 9,900 0.52 0.45 4,500
<br />Deep Percolation l....2 20.900 2.40 .z...J.Q 43.900
<br /> TOTAL RETURN 7.6. 44,100 1. 73 76,300
<br />
<br />OFF-FARM SALT PICK UP (Canal)
<br />ONFARM SALT PICK UP
<br />TOTAL SYSTEM SALT PICK UP (Returns less Diversion)
<br />
<br />14,400 TONS (2.5 T/A)
<br />34,000 TONS (5.8 T/A)
<br />48,400 TONS (8.3.T/A)
<br />
<br />'~~F~~
<br />
<br />12
<br />
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