WSPC06972

• File Number: 8283.100
• Description: Colorado River Computer Models - Colorado River Simulation System - Reclamation - CORSIM
• State: CO
• Basin: Colorado Mainstem
• Water Division: 5
• Date: 9/1/1973
• Author: DOI-BOR
• Title: Application of a River Network Model to Water Quality Investigations for the Colorado River
• Water Supply Pro - Doc Type: Report/Study

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(lb) - 1980 - Comparing 1980 level projects for conditions CIa) and
(lb) in Table IX, it is seen that only a few additional projects
are included for (lb). Results at Imperial Dam were found to be
2 ppm greater for (lb) than for CIa). Consequently, detailed results
for (lb) - 1980 are not included and those for (la) - 1980 should be
used.

(lb) - 1990 - Deficit flows and delta salts were incurred on the
Colorado, San Juan, and San Rafael Rivers. ,Magnitudes are consid-
ered minor in relation to total input for the 30 years. Only the
2-ton/acre pickup rate was used.

(lb) - 1990 - Reg - Personnel in the Upper Colorado Regional Office
believed several projects excluded from the (lb) - 1990 run would
be constructed. Consequently, another (lb) - 1990 run was made to
include the Uintah Unit, Savery-Pot Hook, and the Jensen Unit on the
Green River, Dallas Creek on the Colorado River, and Animas-La
Plata on the San Juan River.

Preliminary runs indicated many deficit flows on the San Juan,
San Rafael, and Colorado Rivers. Those for the San Rafael and
Colorado Rivers were tolerated. For the San Juan River, a rough
monthly distribution based on the detailed operations study was
used for the Animas-La Plata. This distribution was modified
slightly, resulting in somewhat improved results. Only the
2-ton/acre pickup rate was used.

(lb) - 2000 - Initial runs indicated shortages on the San Rafael,
San Juan, and Colorado Rivers. Difficulties occurred 27 months on
the San Rafael,S months on the Colorado, and 1 month on the San
Juan. The original San Rafael data were more or less arbitrarily
adjusted to reduce shortages, as shown in Table X. (These modified
data were used for every run and condition, including those already
described. )

The San Juan River projects were based on the detailed operations
study and in a senSe were already adjusted. Consequently, the
I-month problem on July 1962 was easily corrected as:

Flow - old
Flow - new
Salts

-191
-240
identical

July

-160
-106

Item

June

Because the Colorado River inputs are a single cycle, difficulties
during other months might occur if adjustments were made. There-
fore, Colorado River shortages were tolerated.

30