We obtained the Densified Streams layer from Diane Rainsford
at the USFS Siuslaw National Forest Office in Corvallis.
This is the most detailed streams layer that exists for
the study area. According to the metadata, it contains
information from a variety of sources that were merged
into one layer. Several of these layers were of different
spatial scales. Nonetheless, this layer is useful because
many of the small, first order streams appear on this
layer.
Total length of streams contained in this layer are 15,
240.9 km for the study area. Compare this to the stream
lengths for the
1:100K,
1:24K
and DEM-Derived layers -- 5 times more stream length than
the 1:100K layer!
Parts of this layer (light blue in figure)
also contained stream gradient and confinement information.
We used this information to check our results when we derived
stream gradient and confinement from the DEMS. We compared
this layer to our Derived streams.
This data layer contains variable scaled
data and should not be used to calculate stream densities.
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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