Dataset Identification:
Resource Abstract:
- description: A two-week field operation was conducted in the John Day Reservoir on the Columbia River to image the floor of
the pool, to measure the distribution and thickness of post-impoundment sediment, and to verify these geophysical data with
video photography and bottom sediment samples. The field program was a cooperative effort between the USGS Coastal and Marine
Geology Team of the Geologic Division and the USGS Columbia River Research Laboratory of the Biological Resources Division.
The data collection was completed aboard the R/V ESTERO during September 13-27, 2000. The interest in sediment accumulation
in the reservoir was two-fold. First, it was unknown how effective this reservoir was as a sediment trap to material that
otherwise would have been transported down-river to the estuary and eventually to the ocean. The recent erosion of beaches
along the Washington coast has been attributed to a decreased contribution of sediment from the Columbia River to the coastal
system due to the damming of the river. Second, sediment accumulation on the floors of reservoirs along the Columbia River
has been suggested to be diminishing salmon spawning grounds. The extent of changes in habitat since construction of the John
Day Dam, however, had not been documented. Common data sets were needed to address both of these questions, and for these
reasons this geophysical and sampling program was undertaken.; abstract: A two-week field operation was conducted in the John
Day Reservoir on the Columbia River to image the floor of the pool, to measure the distribution and thickness of post-impoundment
sediment, and to verify these geophysical data with video photography and bottom sediment samples. The field program was a
cooperative effort between the USGS Coastal and Marine Geology Team of the Geologic Division and the USGS Columbia River Research
Laboratory of the Biological Resources Division. The data collection was completed aboard the R/V ESTERO during September
13-27, 2000. The interest in sediment accumulation in the reservoir was two-fold. First, it was unknown how effective this
reservoir was as a sediment trap to material that otherwise would have been transported down-river to the estuary and eventually
to the ocean. The recent erosion of beaches along the Washington coast has been attributed to a decreased contribution of
sediment from the Columbia River to the coastal system due to the damming of the river. Second, sediment accumulation on the
floors of reservoirs along the Columbia River has been suggested to be diminishing salmon spawning grounds. The extent of
changes in habitat since construction of the John Day Dam, however, had not been documented. Common data sets were needed
to address both of these questions, and for these reasons this geophysical and sampling program was undertaken.
Citation
- Title Columbia River ESTR00030 Survey Tracklines collected in 2000.
-
- creation Date
2018-05-12T01:18:13.158826
Resource language:
Processing environment:
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Metadata data stamp:
2018-08-07T00:18:51Z
Resource Maintenance Information
- maintenance or update frequency:
- notes: This metadata record was generated by an xslt transformation from a dc metadata record; Transform by Stephen M. Richard, based
on a transform by Damian Ulbricht. Run on 2018-08-07T00:18:51Z
Metadata contact
-
pointOfContact
- organisation Name
CINERGI Metadata catalog
-
- Contact information
-
-
- Address
-
- electronic Mail Address cinergi@sdsc.edu
Metadata language
eng
Metadata character set encoding:
utf8
Metadata standard for this record:
ISO 19139 Geographic Information - Metadata - Implementation Specification
standard version:
2007
Metadata record identifier:
urn:dciso:metadataabout:c16feec5-6f61-44b9-909d-98f5b9f2029d
Metadata record format is ISO19139 XML (MD_Metadata)