WSP04296

• File Number: 8054
• Description: Water Salvage
• State: CO
• Basin: Statewide
• Date: 8/10/1956
• Author: R M Gildersleeve
• Title: Salvage Attributable to Transmountain Diversions at Selected Stations on the Upper Colorado River Above Cameo - Colorado
• Water Supply Pro - Doc Type: Report/Study

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M E M 0 RAN DUM

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To:

R. M. Gildersleeve

August 10, 1956

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From: J. E. Flack

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Subjec'~: Salvage Attributal to 'l'rnnsmountain Diversion;; at Selocted
Stations on tho Upper Colo.mdn !liver abov" Cameo, Colorado.

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'fhis series of studies was undertaken to deterliL1.ne salvage Hater

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that is attributal to transmountain diversion of Colorado River water.

This salvage is clue '~o reduced river stages, decreased evaporation because

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of less rlater surface, reduced evapo-transpiration by channel bank grow~h,

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and reduction or elimin;rtion of over-bank fJow. 11os'~ diversions are made

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in such a mannEll" as to raduce high fJows of the upper Colorado River and

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its tributaries.

Utilizing the period of water years from 1911 through 19.54, it

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was attempted to determine tho relationship between the annual (\""ter year)

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discharge, the amount of the historic transmountain diversion,ar.d the sal-
vage attributal to the diversion. This Wall done by analyzing the same ba-

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sic data \dth tr'o different approaches. The basic procedure was to compare
the change in the l'el1ltionsh1p of Inflow and Outflow with change in trans_

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mountain diversion for a portio n of the c1rain.'1ge area of the upper Colorado
River. A measure of too inl'low was made by using Inflow Index Stati.ons

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.,<" (also rolled Index Supply) corrected for any transmountain dj:verf;ions above

". '1 the station eaee, ~.nc] compm:'c it Vl1.tl, the discharge at an OutflO\l stat1.on.

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