WSP09717

• File Number: 8270.100
• Description: Colorado River Basin Water Quality/Salinity -- Misc Water Quality
• Basin: Colorado Mainstem
• Water Division: 5
• Date: 1/1/1969
• Author: USDOI
• Title: Quality of Water - Colorado River Basin - Progress Report No. 4 - January 1969
• Water Supply Pro - Doc Type: Report/Study

BASIC STUDIES

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1947 (Table No. 13). Load data for these years ~er~ estimated by exten-
sive multiple correlations using data for the Colorado River near Cisco,
Utah, and near Grand Canyon, Arizona; the Green River 6T Green River,
U~; and the San Juan River near Bluff, ULah.

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8. Colorado River near Grand Canyon, Arizona

Discharge measurements are available for the period of study and
chemical quality records are available except for the period December
1942 to August 1943 (Table No. 14). Loads for the period of missing rec-
ords were estimated from records at upstream stntion5.

9. Virgin River at Littlefield, Arizona

Discharge measurements \oIere obtained for t he study period but quali 1.y
data are available only from July 1949 to December 1966. Detailed corre-
lations were employed to estimate the data for the missing period (Table
No, 15),

10. Colorado River below Hoover Dam, Arizona-Nevada

Discharge and quality records are available for the 1941-66 period
(Table No. 16), except for the period November 1944 to September 1950
when these quality data are based on specifIc conductance analyses only
for intermittent intervals.

11. Colorado River below Parker Dam, Arizona-California

Discharge measurements for the study period are included in records
of the Geological Survey. Quality data have been obGained since July
1941 by the Metropoliul.O Water District of Sout.hern California at the
Lake Havasu Intake Pumping Plant and are published in its Report No. 815
dated November 1963 for the July 191n throug.11 September 1963 period. The
6 months of missing record were obtained by correlation. Monthly records
of the chemical analyses of constituent.s for July 1941 through December
1966 were obtained from the Metropolitan Wa.ter Dis'~rict of Southern
California (Table No. 17).

12. Colorado River at Imperial ~. Arizona-California

Discharge figures are available for +.he studj' pi: riod. Those from
October 1942 through September 196( n~e based on th~ combined records
of dis~harge obtained at gaging stations on Colorado River at Yuma, All-
American Canal near Imperial Dam, Gila GraviLy Main Canal at Imperial
Dam. Yuma. Main Canal at Laguna Dam. and North Gila Valley Canal at Laguna
Dam less that of Gila River near Dome. A~izona. Records after September
1960 are based on the combined daily discharge of Colorado River passing
Imperial Dam snd at gaging stat.ions on AII-A.me~i':an Canal near Imperial
Dam and Giln Gravity ~min Canal at Imperial Ohm.

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