9521

• UCREFRP Catalog Number: 9521
• Author: Liebermann, T. D., D. K. Mueller, J. E. Kircher and A. F. Choquette.
• Title: Characteristics and Trends of Streamflow and Dissolved Solids in the Upper Colorado River Basin, Arizona, Colorado, New Mexico, Utah, and Wyoming.
• USFW Year: 1989.
• USFW - Doc Type: Denver.
• Copyright Material: NO

200
100
0
300
0 200
Z
O
U 100
w
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ir
w
0- 30,000
w
T 20,000
U
10,000
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Z 0
3 1000
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Q 500
Lu
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Q 4000
D
Z
w 2000
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40,000
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A 1974-83
B
1974-83
C
1952-65
---- 1966-83
D
1950-83
E
1952-83
F
1914-34
-- 1935-49
- ---- 1950-65
------ 1%6-83
I oil Rill I
OCT NOV DEC JAN FEB MAR APR MAY JUNE JULY AUG SEPT
Figure 12. Mean daily streamflow at selected sites in lower Colorado subregion of Grand region. A, Site
15, Reed Wash near Loma, Colo. B, Site 17, Salt Creek near Mack, Colo. C, Site 18, Colorado River near
Colorado-Utah State line. D, Site 19, San Miguel River at Uravan, Colo. E, Site 20, Dolores River near Cisco,
Utah. F, Site 21, Colorado River near Cisco, Utah.
month. Sodium also is a predominant cation during the low-
flow season. Leaching from the underlying Mancos Shale
contributes large quantities of calcium, magnesium, and
sulfate. The source water from the Colorado River contains
large quantities of sodium and chloride from upstream ther-
30 Characteristics and Trends of Streamflow and Dissolved Solid
mal springs, and the concentration of these constituents in
irrigation-return flow is increased because of evapotranspira-
tion. The combined mean annual dissolved-solids load from
sites 14, 15, 16, and 17 is about 303,000 tons (table 5). Other
sites in the Grand Valley where irrigation-return flow was
s in the Colorado River Basin