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Last modified
7/14/2009 5:02:35 PM
Creation date
5/20/2009 9:52:12 AM
Metadata
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UCREFRP
UCREFRP Catalog Number
9457
Author
Ptacek, J. A., D. E. Rees and W. J. Miller.
Title
A Study of the Ecological Processes on the Fryingpan and Roaring Fork Rivers Related to Operation of Ruedi Reservoir.
USFW Year
2003.
USFW - Doc Type
Fort Collins.
Copyright Material
NO
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gradient channel type, transects were split between two sections at the FPR-LG site <br />(designated FPR-LG upper and FPR-LG lower). Figures 11 and 12 show transect <br />placement at this site and in a typical manner for all sites. <br />Data required by IFIM includes a full set of hydraulic measurements (bed and velocity <br />profiles, water surface elevations, and discharge) and several stage-discharge <br />measurements. Vertical elevations were established throughout each habitat type by <br />establishing a primary benchmark and at least two secondary benchmarks at each study <br />site. At each habitat and hydraulic transect, a measuring tape was stretched across the <br />river and attached to the wooden stake representing the end of that specific transect. <br />Linear distance (stationing) between stakes was recorded for all measured parameters. <br />Streambank and water surface elevations were surveyed using a standard auto level and <br />differential leveling. All surveys followed general guidelines listed by Bovee (1997). <br />Within the stream channel, depth and mean column velocity were measured every 0.3-0.9 <br />m (1-3 ft) across the wetted portion of the river. A Swoffer Model 2100 velocity meter <br />and topset rod were used for all discharge and velocity profile measurements. Along the <br />transect line at each interval where depth and mean column velocity were measured, <br />dominant and subdominant substrate (following codes from Bovee (1997)) and cover <br />type were also recorded. On two instances (pool cross section at FPR-BP, and run cross <br />sections at RFR-TF) depths and/or velocities were either too deep or too fast to allow safe <br />measurements at some point locations. For those locations, data was gathered only at <br />points where safe measurements could be taken. <br />Hydraulic Simulations <br />All field data were entered into a spreadsheet program and checked for accuracy. The <br />windows based PHABSIM version 1.10 software (USGS Mid-continent Ecological <br />Science Center 2001) was used to create the hydraulic modeling runs. PHABSIM <br />combines hydraulic modeling programs with a habitat suitability subroutine, allowing the <br />user to predict changes in physical habitat due to alterations in flow. <br />Draft Final Report, Fryingpan and Roaring Fork Rivers February 12, 2003 <br />Miller Ecological Consultants, Inc. Page 14
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