| Identifier | 2015-648-FA | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Purpose | Collect nearshore bathymetry and beach topography | ||||||||
| Location | Puget Sound | ||||||||
| Summary | aerial_photos, base, bathy, matlab, planning, Samples, sediment_sampling, svp, temp topo added to FAD 8/20/2015 | ||||||||
| Info derived | Nearshore Bathymetry, Beach Topography | ||||||||
| Comments | Entries for this field activity are based on entries from Field Activity 2014-649-FA Entries for this field activity are based on entries from Field Activity 2015-605-FA | ||||||||
| Projects | |||||||||
| Platform |
|
||||||||
| Vehicles | MarFac; Chevy Suburban - gray; 7 pass; G62-2874L |
||||||||
| Itinerary |
|
||||||||
| Bounds |
|
| Organization |
2885 Mission Street
Santa Cruz, CA95060
(831) 460-7401
|
||||||||
|---|---|---|---|---|---|---|---|---|---|
| Principal investigators | Jonathan WarrickGuy R Gelfenbaum | ||||||||
| Crew members |
|
||||||||
| Information specialist(s) |
|
| Data category: | Imagery, Location-Elevation, Sampling, Sonar |
|---|---|
| Data type: | Photo, Navigation, Transects, Geology, Single Beam, Sound Velocity |
| Equipment | Usage description | Data types | Datasets |
|---|---|---|---|
| Echosounder-1 | Single Beam | 1 | |
| Trimble R7 GPS receiver 9 | Benchmarks, LIDAR, Navigation, Profiles, Transects | 2 | |
| Echosounder-2 | Single Beam | (no data reported) | |
| grab sampler | Surveys (geochemical), Geology | 2 | |
| camera | Photo | (no data reported) | |
| Trimble R7 GPS receiver | Benchmarks, LIDAR, Navigation, Profiles, Transects | (no data reported) | |
| Trimble R7 GPS (AS) | Benchmarks, Navigation, Profiles, Transects | (no data reported) | |
| soundvelocityprofiler | Sound Velocity | (no data reported) |
| Dataset name | Equipment | Description | Dataset contact |
|---|---|---|---|
| bathymetry data | Echosounder-1 | published in ScienceBase; U.S. Geological Survey data release, doi: 10.5066/F7S75DG9 | Andrew Stevens |
| Digital elevation models (DEMs) of the Elwha River delta, Washington, July 2015 | Trimble R7 GPS receiver 9 | This part of the data release presents a digital elevation model (DEM) derived from bathymetry and topography data of the Elwha River delta collected in July 2015. Two dams on the Elwha River, Washington State, USA trapped over 20 million m3 of sediment, reducing downstream sediment fluxes and contributing to erosion of the river's coastal delta. The removal of the Elwha and Glines Canyon dams between 2011 and 2014 induced massive increases in river sediment supply and provided an unprecedented opportunity to examine the response of a delta system to changes in sediment supply. The U.S. Geological Survey developed an integrated research program aimed at understanding the ecosystem responses following dam removal that included regular monitoring of coastal and nearshore bathymetry and topography. As part of this monitoring program, the USGS conducted a bathymetric and topographic survey in the Strait of Juan de Fuca on the Elwha River delta, Washington (USGS Field Activity Number 2015-648-FA). Bathymetry data were collected using two personal watercraft (PWCs), each equipped with single-beam echosounders and survey-grade global navigation satellite systems (GNSS). Topography data were collected on foot with GNSS receivers mounted on backpacks. DEM surfaces were produced from all available elevation data using linear interpolation. | Andrew Stevens |
| topography data | Trimble R7 GPS receiver 9 | published in ScienceBase; U.S. Geological Survey data release, doi: 10.5066/F7S75DG9 | Andrew Stevens |
| grain-size data | grab sampler | published in ScienceBase; U.S. Geological Survey data release, doi: 10.5066/F7S75DG9 | Andrew Stevens |
| Dataset name | Equipment | Description | Dataset contact |
|---|---|---|---|
| Surface-sediment grain-size distributions from the Elwha River delta, Washington, July 2015 | grab sampler | This portion of the data release presents sediment grain-size data from samples collected on the Elwha River delta, Washington, between July and August 2015 (USGS Field Activities 2015-648-FA and 2015-652-FA). Surface sediment was collected from 70 locations using a small ponar, or 'grab', sampler from the R/V Frontier on July 28, 2015. An additional 17 sediment samples were collected between July 22 and August 23, 2015 by scuba divers. Forty-eight sediment samples were collected at low tide using a push corer at intertidal locations on the delta. The locations of grab samples and intertidal samples were determined with a hand-held global navigation satellite system (GNSS). Samples obtained by divers were collected adjacent to fixed monuments on the seabed with previously determined coordinates. The grain-size distributions of samples were determined using standard techniques developed by the USGS Pacific Coastal and Marine Science Center sediment lab. The grain-size data are provided in a comma-delimited spreadsheet (.csv). | Andrew Stevens |
