WSP04999

• File Number: 8054
• Description: Water Salvage
• State: CO
• Basin: Statewide
• Date: 6/1/1975
• Author: Utah Water Research
• Title: Water Salvage Potentials in Utah - Volume II - Evaporation Suppression by Reservoir Destratification
• Water Supply Pro - Doc Type: Report/Study

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RESERVOIR MAXIMUM DEPTH (FEET)

FLOW INDEX =0.29 FOR LINES
SHOWN

SUPP=5.434 + 10.908 LOG (D)
-5.3411 LOG (EI) + 15.479 FLOW
R = .94

200

1000

300

500

700

Figure IS. Suppression as a function of depth, flow Index and elevation.

man-made reservoirs in Utah for which maximum
depth data were available. This included 81
impoundments which are shown on the reservoir
location map (Figure 17). A complete list of
reservoir names and numbers was given in Volume
I. Those evaluated for destratification potential are
identified in Appendix I. Many of the reservoirs
included were obviously too shallow to have any
potential for suppression by thermal mixing. They
were included in order to provide a supplement to
the reservoir inventory developed for Volume I
(whiCh did not include the depth parameter).

No natural lakes nor wetlands were included
in the analysis except for Bear Lake because the
outlet of natural rescrvoirs are generally above the
thermocline, thereby eliminating any long term net
suppression.

The 6-month model was used rather than the
annual model as a basis for the regression model
for the following reasons:

I. Temperature profile data were available
for the summer season on 10 reservoirs but
complete annual data were available only on one
(Lake Powell).

2. The 6-month model represents the rele-
vant suppression period for all reservoirs which do
not have major amounts of carryover storage
through the winter.

3. Even on those reservoirs which have a
major carryover storage, the negative suppression
after October 3] is either negligible or may be
estimated by comparison wilh Lake Powell. For

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