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Last modified
1/26/2010 12:53:19 PM
Creation date
10/12/2006 12:05:14 AM
Metadata
Fields
Template:
Water Supply Protection
File Number
8062
Description
Federal Reserved Water Rights
State
CO
Basin
Statewide
Date
9/1/1979
Author
R Barry Nehring
Title
Evaluation of Instream Flow Methods and Determination of Water Quantity Needs for Streams in the State of Colorado - September 1979
Water Supply Pro - Doc Type
Report/Study
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<br />6 <br /> <br />Table 3. Key flow parameters used to determine minimum flow require- <br /> ments using the R-2 Cross Single Transect Method.a <br /> X y Z <br />Stream Average Average Wetted <br />width depth velocity perimeter <br />(ft) (ft) (ft/sec) (%) <br />1 - 20 0.2 or greater 1 50 <br />21 - 40 0.2 - 0.4 1 50 <br />41 - 60 0.4 - 0.6 1 50 to 60 <br />61 - 100 0.6 - 1. 0 1 70 or greater <br /> <br />aColorado rivers in excess of 100 feet in wetted perimeter are <br />judged on individual channel characteristics as related to key flow <br />parameters. Parameters ~ply to instream flow recornnendations for <br />period May to September. October to April flow recommendations will <br />~e at the same level, or at the natural undepleted flow, whichever is <br />less. <br /> <br />Instream flow recommendation in cfs are selected when minimum <br />,levels of two or more parameters are reached within the designated <br />stream class. Average depth evaluation is based on maximum body depth <br />of largest fish present and is considered one of the most important <br />flow parameters. Body depth is defined as the distance from the tip <br />of the extended dorsal fin to the lowest portion of the body cavity. <br /> <br />,/ <br /> <br />I <br />I <br />, <br />1 <br />I <br />I <br />I <br />I <br />I <br />)1 <br />i <br />I <br />i <br />I! <br />
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