7072

• UCREFRP Catalog Number: 7072
• Author: Brewer, M. and J. Renne.
• Title: Crystal Reservoir Temperature Study.
• USFW Year: 1988.
• USFW - Doc Type: Lakewood, CO.
• Copyright Material: NO

Crystal Reservoir Temperature Study
Page 4
September 23, 1988
Several Physical Habitat Simulation sites are located within the
study area. These sites were included in the network as observation
nodes. The final stream temperature network is in Table 2.
Data Reduction
Fortran-77 programs were used to convert daily hydrologic and
meteorologic data into bi-weekly averages. The season was limited
to March through September to focus on the Squawfish growing season.
The time periods used are in Table 3.
Relative humidity on a daily basis was unavailable from the National
Oceanic and Atmospheric Administration. However, daily dew point
temperature was obtained so that Relative humidity could be
calculated using:
H R --
112 - .1T + T„
3
112 + .9T
-8
f
where
HR Relative Humidity L °L)
T ambient Air Temperature
To _ Dew Point Temperature
Regression aids in the model were used to fill in water temperatures
at headwater and validation nodes. The model filled in missing
discharges with the mean for the respective time period. Regression
statistics are in Table 4.
Several ancillary Fortran-77 programs were developed to format-the
data into required input files processed by the temperature model.
All validation tables were requested when the model was first
executed.
RESULTS
Validation Nodes
Comparisons were made between predicted (regressed) and observed
mean daily water temperatures at all validation nodes. Validation
statistics produced by the model include the mean difference, the
probable difference, and maximum error. The mean difference (S) is
the average of the differences between the predicted regression
model and the heat transport model. The probable difference (S)