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Colorado Water Resources Circular No. 20
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Colorado Water Resources Circular No. 20
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Water Supply Protection
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Colorado Water Resources Circular No. 20, Transit Losses and Travel Times for Reservoir Releases, Upper Arkansas River Basin, Colorado
State
CO
KS
Basin
Arkansas
Water Division
2
Date
1/1/1973
Author
Russell K. Livingston, U.S. Geological Survey, Colorado Division of Water Resources: Office of the State Engineer, Southeastern Colorado Water Conservancy District
Title
Colorado Water Resources Circular No. 20, Transit Losses and Travel Times for Reservoir Releases, Upper Arkansas River Basin, Colorado
Water Supply Pro - Doc Type
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i r <br />0 <br />These ditches can also be controlled to Qbtain the desired diversion <br />even during low river flows, and adjustments are usually made when an <br />increase occurs during a reservoir release, <br />The amount of water inadvertently diverted by a particular ditch <br />can readily be determined through analysis of the ditch's diversion <br />record during reservoir releases. Following a brief study of the diver- <br />sion records for 21 ditches along the upper Arkansas River (table 5), <br />14 ditches were selected to be examined in detail during 15 reservoir <br />releases. These releases ranged from about 225 ft /s to about 500 ft /s <br />and were made during the years 1965, 1966, 1970, 1971, and 1972. The <br />average reservoir release was about 400 ft /s. <br />It is emphasized that data in table 5 are averages of diversions <br />during reservoir releases only. They do not represent the diversion <br />during any one release, and they do not report average diversions during <br />all types of river conditions. <br />Analysis of these data consisted of simple graphical techniques and <br />multiple regression using the following variables: <br />(a) Dependent variables: <br />(1) Total inadvertent diversion by the 14 ditches, in cubic <br />feet per second, and <br />(2) Inadvertent diversion by a selected ditch, in cubic feet <br />per second. <br />(b) Independent variables: <br />(1) Amount of reservoir release, in cubic feet per second, <br />(2) River flow at Wellsville gage at time of release, in <br />cubic feet per second, <br />(3) River flow at Wellsville gage at time release arrived at <br />the Wellsville gage, in cubic feet per second, and <br />(4) River flow at Wellsville gage 6 hours after release <br />arrived at the Wellsville gage, in cubic feet per second. <br />Results of this analysis indicated the simple relation of total <br />inadvertent diversion to river flow at the Wellsville gage at time of <br />release was well defined and the most useful for administrative purposes. <br />This relationship is shown on figure 7. Figure 7 shows that inadvertent <br />diversions range from 48 to 4 ft Is for antecedent river flows of from <br />350 to 3,200 ft /s, respectively. Although intuitively one would expect <br />that the amount of the release affects inadvertent diversions, available <br />data were insufficient to adequately define this effect. Inadvertent <br />C <br />
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