VeeAnn A. Cross David C. Twichell 2004 raster digital data Open-File Report 2004-1014 Woods Hole Coastal and Marine Science Center, Woods Hole, MA U.S. Geological Survey, Coastal and Marine Geology Program https://doi.org/10.3133/ofr20041014 https://pubs.usgs.gov/of/2004/1014/htmldocs/metadata.htm VeeAnn A. Cross David C. Twichell 2004 Open-File Report 2004-1014 Reston, VA U.S. Geological Survey https://pubs.usgs.gov/of/2004/1014/ 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. The chirp seismic-reflection profiles were collected to measure the thickness and distribution of sediment that has accumulated in the John Day Reservoir since impoundment in 1968. For more information about the field activity, see https://cmgds.marine.usgs.gov/fan_info.php?fan=2000-030-FA. These data are also available via GeoMapApp (http://www.geomapapp.org/) and Virtual Ocean (http://www.virtualocean.org/) earth science exploration and visualization applications. 20000911 20000922 ground condition Complete None planned -120.69 -119.3 45.943 45.686 USGS Metadata Identifier USGS:c2795698-8ec0-4667-9355-f40566b64563 None chirp CMGP Coastal and Marine Geology Program navigation Open-File Report reservoir sediment thickness seismic seismic-reflection SIS-1000 subbottom U.S. Geological Survey USGS segy OF 2004-1014 Woods Hole Science Center USGS Thesaurus sub-bottom profiling geophysics geospatial datasets None North America United States John Day Reservoir John Day Dam McNary Dam Columbia River Washington Oregon Lake Umatilla none The U.S. Geological Survey must be referenced as the originator of the dataset in any future products or research derived from these data. VeeAnn A. Cross U.S. Geological Survey Marine Geologist mailing and physical address

384 Woods Hole Rd.

Woods Hole MA 02543-1598 (508) 548-8700 x2251 (508) 457-2310 vatnipp@usgs.gov Microsoft Windows 2000 Version 5.0 (Build 2195) Service Pack 4; ESRI ArcCatalog 8.2.0.700 Information unavailable from original metadata. Information unavailable from original metadata. The navigation was collected with a P-Code plugger navigation system. Although the navigation antenna was mounted on the ship rather than the towfish, the system was towed shallow and extremely close to the boat therefore making the "layback" error negligible. Because of the high fire rates of the system, each "shot" does not have a navigation point, therefore these values have to be interpolated. The chirp seismic subbottom data was collected with the SIS-1000 sidescan and seismic system. The transducer for the seismics is mounted on the towfish with the data collected logged on a TritonElics QMIPS computer system. The seismic data was separated from the raw data file and converted to the SEG-Y format using the USGS Unix program "qmipstosegy". unknown VeeAnn A. Cross U.S. Geological Survey Marine Geologist mailing and physical address

384 Woods Hole Rd.

Woods Hole MA 02543-1598 (508) 548-8700 x2251 (508) 457-2310 vatnipp@usgs.gov The seismic data were then further processed using SeismicUnix to filter and add gain to the data as well as output a format for printing. Lines 1-7, and lines 37-40 were collected at a 0.8 second fire rate. Lines 8-36 were collected at a 0.530 fire rate. unknown VeeAnn A. Cross U.S. Geological Survey Marine Geologist mailing and physical address

384 Woods Hole Rd.

Woods Hole MA 02543-1598 (508) 548-8700 x2251 (508) 457-2310 vatnipp@usgs.gov Edits to the metadata were made to fix any errors that MP v 2.9.36 flagged. This is necessary to enable the metadata to be successfully harvested for various data catalogs. In some cases, this meant adding text "Information unavailable" or "Information unavailable from original metadata" for those required fields that were left blank. Other minor edits were probably performed (title, publisher, publication place, etc.). Modified the title to include format and year. Added the link to the data catalog page in the Identification section, and a link to the publication in the Larger Work Citation. Added online link to the data in the Distribution section. Added a link to the field activity. The metadata date (but not the metadata creator) was edited to reflect the date of these changes. The metadata available from a harvester may supersede metadata bundled within a download file. Compare the metadata dates to determine which metadata file is most recent. 20171206 U.S. Geological Survey VeeAnn A. Cross Marine Geologist Mailing and Physical

384 Woods Hole Road

Woods Hole MA 02543-1598 508-548-8700 x2251 508-457-2310 vatnipp@usgs.gov USGS Thesaurus keywords added to the keyword section. 20180720 U.S. Geological Survey VeeAnn A. Cross Marine Geologist Mailing and Physical

384 Woods Hole Road

Woods Hole MA 02543-1598 508-548-8700 x2251 508-457-2310 vatnipp@usgs.gov Crossref DOI link was added as the first link in the metadata. 20191118 U.S. Geological Survey VeeAnn A. Cross Marine Geologist Mailing and Physical

384 Woods Hole Road

Woods Hole MA 02543-1598 508-548-8700 x2251 508-457-2310 vatnipp@usgs.gov Added keywords section with USGS persistent identifier as theme keyword. 20200908 U.S. Geological Survey VeeAnn A. Cross Marine Geologist Mailing and Physical

384 Woods Hole Road

Woods Hole MA 02543-1598 508-548-8700 x2251 508-457-2310 vatnipp@usgs.gov Universal Transverse Mercator 11 0.9996 -117.000000 +00.000000 500000 0 coordinate pair 20 20 meters North American Datum of 1983 Geodetic Reference System 80 6378137.000000 298.257222 The chirp seismic subbottom data was collected with the SIS-1000 sidescan and seismic system. The transducer for the seismics is mounted on the towfish with the data collected logged on a TritonElics QMIPS computer system. The seismic data was separated from the raw data file and converted to the SEG-Y format using the Unix program "qmipstosegy". The seismic data were then further processed using SeismicUnix to filter and add gain to the data as well as output a format for printing. Test line 1 and lines 1-7, and lines 37-40 were collected at a 0.8 second fire rate. Test line 3 and lines 8-36 were collected at a 0.530 fire rate. Due to the limitations of "qmipstosegy", the navigation information stored in the SEG-Y headers is all UTM, zone 11, WGS84. The study area actually covers zones 10 and 11, but for consistency, all values are in zone 11. Seismic test lines and line 1-7 did not have the pressure depth sensor functioning. The value for depth was coming from the Hypack navigation system which was hardwired at 3m. Seismic lines 8-40 should have the pressure depth value from the sensor. However, the value reported appeared to be too shallow. The hardwired depth value from Hypack during these data collections lines was 1.5 m - the actual measured depth of the fish. Additional information of use - the chirp length on the 0.800 second fire rate is 20 ms, and 12 ms on the 0.530 second fire rate. U.S. Geological Survey VeeAnn A. Cross U.S. Geological Survey Marine Geologist mailing and physical address

384 Woods Hole Rd.

Woods Hole MA 02543-1598 (508) 548-8700 x2251 (508) 457-2310 vatnipp@usgs.gov Downloadable Data These data were prepared by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, make any warranty, expressed or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed in this report, or represents that its use would not infringe privately owned rights. Reference therein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States government or any agency thereof. Any views and opinions of authors expressed herein do not necessarily state or reflect those of the United States government or any agency thereof. Although all data published in this report have been used by the USGS, no warranty, expressed or implied, is made by the USGS as to the accuracy of the data and related materials and/or the functioning of the software. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in the use of this data, software, or related materials. SEG-Y Link is to a folder containing SEG-Y files. https://pubs.usgs.gov/of/2004/1014/data/segy/ none 20240318 VeeAnn A. Cross U.S. Geological Survey Marine Geologist mailing and physical address

384 Woods Hole Rd.

Woods Hole MA 02543-1598 (508) 548-8700 x2251 (508) 457-2310 whsc_data_contact@usgs.gov The metadata contact email address is a generic address in the event the person is no longer with USGS. (updated on 20240318) FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998 local time