We obtained a GIS coverage of the streamflow
restoration priorities maps developed by the Oregon Department
of Fish and Wildlife (ODFW) and the Oregon Water Resources
Department (OWRD). The maps were obtained from the ODFW
website.
The streamflow restoration priorities coverage was clipped
to the study area to produce the shapefile 18restor_clip.shp.
Flow restoration priority rankings and other attributes
are assigned to Water Availability Basins (WABs). As determined
by discussion with the MidCoast Watersheds Council, we focused
on the flow restoration priority rankings developed jointly
by ODFW and OWRD. The ODFW/OWRD priority rankings range
from 1 (low) to 4 (high) for each season. We used the summer
rankings (which were always the highest of the 4 seasons'
rankings). We summarized the ODFW/OWRD flow restoration
priorities for 6th fields in flowrest_sum_by6th.shp. Since
WAB boundaries do not coincide with 6th or 5th field boundaries,
we determined the predominant summer ranking for each 6th
field by comparing the area of each ranking within each
6th field. The ranking that occupied more than 50% of the
6th field's area was assigned to the field "dfwrank_summer"
in the 6th field summary coverage (
flowrest_sum.zip,
flowrest_sum_by6th.xls).
The 6th field rankings are a good starting
point for making decisions on where to focus streamflow
restoration activities. Within 6th fields ranked high priority,
OWRD GIS layers showing points of water diversion, areas
of water use, and instream water rights can be used to further
focus efforts. Some of these layers were provided on the
MCWC GIS CD, but the layers are regularly updated and the
most recent versions should be used. These coverages are
available at:
http://www.wrd.state.or.us/index.shtml.
According to information on the ODFW
web
page , streamflow restoration priorities were developed
in fulfillment of Oregon Plan Measure IV.A.8: Identify Instream
Flow Priorities. A contact person is Rick Kruger at the
ODFW Habitat Conservation Division. The
Oregon
Plan website describes some of the parameters that entered
into the streamflow restoration priority rankings.
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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