WSP06234

• File Number: 8271.300
• Description: Colorado River Basin Salinity Control Program - General Information and Publications-Reports
• Basin: Colorado Mainstem
• Water Division: 5
• Date: 2/1/1974
• Title: Salinity Management Options for the Colorado River
• Water Supply Pro - Doc Type: Report/Study

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the median salinity of Thorn and Peterson (1955); 750 to 2,250 micro mho/cm.
In Durand's (1956) evaluation all of the project concentratLons would be suit-
able for sand and very sensitive crops which can have soil saturation extracts
up to 4 mmho. The loamy sands could take the water up to 1,600 mmho, loamy
soil up to 1,000, loamy clays and clays are already exceeded on the sensitive
crops. For plants that could have soil saturatIon extracts up to 10 mmho.,
all the projected soil solution could be used on all textures except the clay
which has a I mmho/cm limit. For crops that could have soil saturation
extracts greater than 10 only, the clay soil would be limited to values below
2.0. With horticultural and forage crops the limit on clay is 1.8 mmho; for
the field crops the clay limit is 1.6 mmho. This system does not incorporate
an allowance for S04= predominance.

Table I. Conductivity in micro mho/em and ion
function of Total Dissolved Solids in ppm.
are indicated.

concentration in meq/l as a
Potential salinity and SAR

Cor Coef r
In Ec = 0.97572 In TDS + 0.5630 0.987
In CI = 1.49470 in TDS - 8.77014 0.984
In Ca+ = 0.658814 in TDS - 2.90328 0.997
In HC02 = 0.23401 in TDS - 0.48040 0.195
In Mg - 1.01057 In TDS - 5.79548 0.988
In Na = 1.146846 in TDS - 5.90873 0.992
In S04 = 0.78180 in TDS - 3.31381 0.972
TDS EC Na Mg Ca S04 CI HC03 SAR Potential
sal inity
900 1339 6.64 2.94 4.85 7.42 4.04 3.04 3.36 7.5
1000 1484 7.49 3.27 5.19 8.05 4.73 3.11 3.46 8.8
1100 1629 8.35 3.60 5.53 8.68 5.46 3.18 3.90 9.8
1200 1773 9.23 3.93 5.86 9.29 6.22 3.25 4.17 10.9
1300 1917 10.12 4.26 6,17 9.89 7.01 3.31 4.43 12.0
1400 2061 11.02 4.60 6.48 10.48 7.83 3.37 4.68 13.1

Data from State of California. 1971. Hydrologic Data 1969. Southern
California. Dept. Water Resources Bul. 139-69. Vol. V, p. 424-426.

The Antipov-Karataev (1960) method places all of the projected water
values well below the XIO critical limit of sodium hazard.
The Wilcox (1958) system would place all the projected waters over 1,000
ppm in the S2 classification which is described as "medium-sodium water may
present a moderate sodium problem in fine textured (clay) soils unless there

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