7945

• UCREFRP Catalog Number: 7945
• Author: Bovee, K. D. and T. Cochnauer.
• Title: Development And Evaluation Of Weighted Criteria Probability-Of-Use Curves For Instream Flow Assessments
• USFW Year: 1977.
• USFW - Doc Type: Fisheries, Instream Flow Information Paper No. 3.
• Copyright Material: NO

analysis, (2) range and optimum analysis, (3) parameter overlap, and
(4) indirect parameter analysis.
Accompanying each set of probability curves is an outline des-
cribing: (1) source material used in the construction of the curves,
(2) analysis technique(s) used, (3) an Instream Flow Group (IFG)
evaluation rating for each curve, (4) comments concerning specific
curves, and (5) references cited.
The IFG evaluation for each curve was developed by adherence to cer-
tain guidelines. An excellent rating was given to those curves for
which frequency analysis was used on a large number of observations from
a wide variety of conditions. 'In addition, for this rating a chi-square
test was required that showed no significant difference in the frequency
of observations within the optimum (p<0.10).
A rating of good was assigned when frequency analysis could be
used, but either the number of observations or the variety of conditions
observed, was limited. Additionally, if a chi-square test of the opti-
mum showed no significant difference in frequency at p <0.25, but >0.10,
the curve was rated good regardless of the number of observations.
The- rating of fair was given if frequency analysis could be used,
with a severely limited number of observations (< 50), or if range and
optimum, parameter overlap, or indirect analyses were the only analysis
techniques capable of constructing the curve. Additionally, if a chi-
square test showed significant (p>0.25) variance within the optimum, the
curve was rated fair regardless of the number of observations.
`i V