WSP11706

• File Number: 8271.300
• Description: Colorado River Basin Salinity Control Program - General Information and Publications-Reports
• Basin: Colorado Mainstem
• Water Division: 5
• Date: 6/1/1980
• Title: Development of Procedures to Evaluate Salinity Management Strategies in Irrigation Return Flows
• Water Supply Pro - Doc Type: Report/Study

ZEEC
Table 2.1. Precipitation of GaG03 and gypsum in soil. (After Swarez and Rhoades 1977.)
'IYPe 1 Water Type 2 Water Type 3 Water
Di- Quar- LF 0.4 LF 0.4 LF 0.1 LF 0.4 0.1 LF 0.4 LF
ver- ter LF~O,l, LF ~ 0.1
sien depth GaOl GaOl ~Ga0l3 GaOl GaOl ~GaO:J3 Caill Gypsum GaO:J Gypsum hCaill ~ Gypsum
(1) (2) (3)3 (4)3 (5) (6)3 (7)3 (8) (3)3 (4) (5)3 (6) (7) (8)
2 1 -15.01 -24.39 9.38 -5.49 -13.67 8.18 -5.14 0 -12.82 0 7.73 0
2 6.74 4.40 2.34 6.88 4.38 2.50 5.97 0 3.84 0 2.13 0
3 5.35 2.53 2.82 5.47 2.41 3.06 4,18 18.63 1.94 0 2.24 18.63
4 3.33 1.25 2.00 3.49 1.26 2.23 2.22 30.58 0.99 0 1.23 30.58
5 1 -13.04 -12.98 -0.06 -5.49 -14.02 8.53 -5.22 0 -12.30 0 7.08 0
2 6.72 4.39 2.33 6.86 4,46 2.40 5.91 0 3.44 0 2,47 0
3 5.28 2.49 2.79 5.52 2.40 3.12 3.94 30.65 1.83 0 2.11 30.65
4 3.11 1.25 1.86 3.57 1.18 2.39 2.21 30.19 0.92 0 1.29 30.19
7 1 -10,89 -12.90 2.01 -5.71 -14.24 8.54 -5.40 0 -11.84 0 6,44 0
2 6.62 4.37 2.25 6.87 4.25 2.62 5.96 0 3.33 0 2.63 0
3 5,08 2.43 2.65 5,61 2.35 3.26 3.66 42.26 0.72 50.08 2,94 -7.82
4 2.83 1.25 1.58 3,67 1.18 2,49 2,21 29.53 0.17 32.30 2.04 -2.77
9 1 -6.72 -11.96 5.2 -6.23 -15.4 9.17 -5.75 0 -11,95 0 6,20 0
2 6.16 4.11 2.01 7.00 4.35 2.70 6.08 1.57 1.60 89.63 4.48 -88.04
3 4.26 2,23 2.03 5.83 2.29 3.54 3.12 59.92 0.19 64,29 2.93 -4.37
4 1.93 1.18 0.75 3.85 1.14 2.71 2.25 27,72 -0.13 32.42 2.38 -4.70

-'" Note,
(1)
(2)
(3)
(4)
(5)

Values are in metric tons (x 10-3) per project (25,000 acres) in the rootzone;
includes in-situ dissolution and subsequent precipitation.

Negative values indicate dissolution; quarter depth is 1 ft.

TYPE 1 water, River initially tmder saturated with GaO:J3 (Feather River)
TYPE 2 water, River initially saturated with GaOl) (Rio Grande River)
1YPE 3 water: River initially saturated with earn3 and nearing saturation with gypsum. (pecos Ri~)

Diversion tlUIl:bers in colunn 1 indicate consecutive cbwnstream irrigation projects. The irrigation waters vary in
salinity an:ong these points, as the drainage flow is cClIpletely returned to the river below each project and the
resulting water was reequilibrated before it arrived at the next downstrecnn project.

GJnt<lsitiro of soil water is contained in Sl>l'lrez and Rhoades (1977).