WSP06604

• File Number: 8281.300
• Description: Colorado River Studies and Investigations - Colorado River Consumptive Uses and Losses Report
• Basin: Colorado Mainstem
• Water Division: 5
• Date: 8/28/1989
• Title: Graphical comparison of the data contained in the BOR's Draft Colorado River System Consumptive Uses and Losses Report-- 1980-1985-- Part 1 of 2
• Water Supply Pro - Doc Type: Report/Study

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In some cases an assumption appears to
have been made that a specific
consumptive use is exactly the same
over the period addressed by a Uses
and Losses Report, An example of such
an assumption can be seen on Graph UB-
1 and the chart for non-CRSP reservoir
evaporation in the Green River Basin
in Colorado (Figure 4). For the years
1981 through 1985, the evaporation is
assumed to be 6,500 acre-feet per
year. There is no allowance for
variation, of evaporation from year to
year as there was in the previous uses
and losses reports,

A similar assumption appears to be
made in cases where consumptive uses
are assumed to change linearly. An
example of this can be seen on Graph
UB-14, municipal and industrial
(mining) in the Green River Basin in
Wyoming (Figure 5), Each of the 5
year periods which make up one Uses
and Losses Report can be defined by a
linear relationship, The last linear
relationship can be defined between
the 1980 and 1985. During this period
annual consumptive uses dropped from
19,000 acre-feet to 6,200 acre-feet.
It may be difficult to obtain accurate
records of municipal and industrial
uses; however, the reason for this
relationship should be explained by
the Bureau of Reclamation,

Coounents

RESERVOIR EVAPORATION
COLORADO - Green River

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71 72 73 74 76 78 77 78 79 80 81 82 83 84 85
Water Year

Figure 4

MUNICIPAL AND INDUSTRIAL - MINERAL
WYOMING - Green River (Total)

(1,000 Arore-Felfll)
201
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71 72 13 74 76 78.7T 78 79 80 81 82 83 84 86
Water Year

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Figure 5

Perhaps the largest single problem with the draft Uses and Losses Report is that
the Bureau of Reclamation has had a series of five people responsible for
analytical work for the report in the Upper Colorado Regional Office. The result

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