8065

• UCREFRP Catalog Number: 8065
• Author: Vaill, J. E.
• Title: Computation of Selected Hydraulic Variables for the Lower Yampa River in Northwestern Colorado.
• USFW Year: 1997.
• USFW - Doc Type: Denver, Colorado.
• Copyright Material: NO

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CROSS SECTION 6

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CROSS SECTION 7
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STATIONING, IN FEET FROM LEFT BANK

Figure 5. Cross-section geometry for the downstream cross sections in Cross Mountain Canyon.

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The WSPRO computations were performed for
cross sections in the three stream reaches (the Patrick
Sweeney diversion structure, the Maybell Canal
diversion structure, and the two subreaches in Cross
Mountain Canyon) assuming streamflows ranging
from 50 to 400 ft3/s. This range of streamflows was
chosen for analysis based on the assumption by State
and Federal biologists (Modde and Smith, 1995) and
CRWCD personnel that streamflows less than 50 ft3/s
would always present adverse conditions to squawfish

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migration and that streamflows greater than
400 ft3/s would always present favorable conditions.
Five percent of the streamflow being analyzed was
assigned to a stream tube based on equal conveyance
in accordance with the assumption of one-dimensional
flow. Stream tubes are imaginary tubes bounded by
streamlines. Because the streamflow between stream-
lines is constant, each stream tube carries a constant
streamflow along its length. The WSPRO output
data listed in the appendixes of this report include

MODEL DESCRIPTION AND APPLICATION 7