Pools are an important component of salmonid habitat.
"Channel widths per pool" is an inverse measure of pool
frequency. A higher value of channel widths per pool represents
a lower pool frequency, i.e., a less desirable condition
(fewer pools). "Channel widths per pool" (
cwpool)
was present as a reach characteristic in the
ODFW
GIS dataset and in the ODFW summaries from which the
Lincoln District data were
entered. Channel widths per pool were calculated for the
USFS Region 6 tabular data
using the ODFW formula:
cwpool = [(reach length) / (reach average active channel
width)] / No. of pools in reach
We averaged channel widths per pool for each 6th field
separately for each data source. To normalize results,
we weighted this average by the length of each reach.
We then calculated 6th field averages for channel widths
per pool across all data sources (field
CWPL_ALL)
in the
summary shapefile,
weighting this final average by the length surveyed from
each data source.
Please address questions or comments
to:
Dr. Ralph Garono
Principal Investigator
Earth Design Consultants, Inc.
rgarono@earthdesign.com
Laura Brophy
Principal Investigator
Green Point Consulting
brophyl@peak.org |
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