We analyzed
absolute
length of aquatic habitat survey data, but we also
were interested in the relative proportion of the stream
network surveyed. Since the total length of the stream
network varies from one 6th field to the next, the proportion
of a 6th field's stream network surveyed may be useful
in interpreting numeric averages and lengths of reaches
with desirable conditions.
We calculated the percentage of the length of
1:100k
streams layer that was surveyed in each 6th field.
Values ranged from 0 to 421% with a mean of 56%. Some
6th fields show a total survey extent of more than 100%
of the length of the 100k streams layer. This is to be
expected, because many surveyed streams are not shown
on the 100k streams layer, so the sum of surveyed lengths
can add up to more than the length of the 100k streams
layer.
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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