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Bathymetry, acoustic backscatter, and minisparker seismic-reflection datasets collected southwest of Montague Island and southwest of Chenega, Alaska during field activity 2014-622-FA High-resolution acoustic backscatter data, bathymetry data, single channel minisparker seismic-reflection data were collected by the U.S. Geological Survey (USGS) and the Alaska Department of Fish and Game in May of 2014 southwest of Chenega Island and southwest of Montague Island, Alaska. Data were collected aboard the Alaska Department of Fish and Game vessel, R/V Solstice, during USGS field activity 2014-622-FA, using a pole mounted 100-kHz Reson 7111 multibeam echosounder, a 500 Joule SIG 2-mille minisparker sound source and a single channel streamer. Categories: Data; Tags: Geomorphology, Geophysics, Marine Geology, Seismology, Structural Geology High-resolution multibeam bathymetry and backscatter data collected in 2004 for the northern Channel Islands region, southern California This data release presents data for 5-m resolution multibeam-bathymetry and acoustic-backscatter data of the northern Channel Islands region, southern California. In 2004 the U.S. Geological Survey, Pacific Coastal and Marine Science Center collected multibeam-bathymetry and acoustic-backscatter data in the northern Channel Islands region, southern California. The region was mapped aboard the R/V Ewing using a Kongsberg Simrad EM-1002 multibeam echosounder. These data were previously published on-line at http://pubs.usgs.gov/of/2005/1153/. In this data release the data have been reprocessed to a finer spatial resolution (5-m versus 15-m) using more modern processing techniques. Due to the large file sizes the entire... Categories: Data; Types: Citation, Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Backscatter (sea floor), Bathymetry, Bathymetry, CMG, CMGP, All tags... Channel Islands, Coastal and Marine Geology Program, Geology, Geophysics, Multibeam sonar, PCMSC, Pacific Coastal and Marine Science Center, Pacific Ocean, Santa Barbara Channel, Seafloor Topography, State of California, U.S. Geological Survey, USGS, data release, environment, geoscientificInformation, imageryBaseMapsEarthCover, oceans, Fewer tags Multibeam bathymetry, acoustic backscatter, and multichannel minisparker seismic-reflection data of USGS field activity 2016-666-FA collected in the Santa Barbara Basin in September and October of 2016 High-resolution multichannel minkisparker seismic-reflection (MCS) profiles were collected by the U.S. Geological Survey in September and October of 2016 from the northern portion of the Santa Barbara Basin offshore southern California. Data were collected aboard the USGS R/V Parke Snavely and NOAA R/V Shearwater during field activity 2016-666-FA. Data were acquired to support USGS geologic hazards projects to aide hazard assessment within the Santa Barbara Basin. High-resolution multichannel minisparker seismic-reflection, multibeam-bathymetry and acoustic-backscatter data were collected to investigate the causes and consequences of submarine landslides in the Santa Barbara Basin. These data and information are... Tags: Geophysics, Marine Geology, Sedimentology, Seismology, Stratigraphy, All tags... Structural Geology, Fewer tags Grain-size data for sediment samples collected in Whiskeytown Lake, northern California, in 2018 and 2019 This data release supersedes version 1.0, published in July 2021 at https://doi.org/10.5066/P9BHOPEP. Versioning details are documented in the accompanying Whiskeytown_VersionHistory.txt file The Carr Fire ignited in northern California in July 2018, and ultimately burned almost 300,000 acres (approximately half on federal lands), resulting in a federal major-disaster declaration (DR-4382). Approximately 93% of the area within Whiskeytown National Recreation Area was burned extensively during the Carr Fire, including all of the landscape surrounding and draining into Whiskeytown Lake. Whiskeytown Lake, a federally managed reservoir, subsequently acted as a sediment trap for material eroded from hillslopes and streambeds... Categories: Data; Tags: Assessments, CMHRP, Coastal and Marine Hazards and Resources Program, Material Resources, PCMSC, All tags... Pacific Coastal and Marine Science Center, Sedimentology, State of California, U.S. Geological Survey, USGS, Water Resources, Whiskeytown National Recreation Area, geoscientificInformation, grain size, land surface characteristics, reservoir sedimentation, sediment, sediment grain size, Fewer tags Multibeam bathymetry and acoustic-backscatter data collected in 2016 in Catalina Basin, southern California and merged multibeam bathymetry datasets of the northern portion of the Southern California Continental Borderland In February 2016 the University of Washington in cooperation with the U.S. Geological Survey, Pacific Coastal and Marine Science Center (USGS, PCMSC) collected multibeam bathymetry and acoustic-backscatter data in and near the Catalina Basin, southern California aboard the University of Washington's Research Vessel Thomas G. Thompson. Data was collected using a Kongsberg EM300 multibeam echosounder hull-mounted to the 274-foot R/V Thomas G. Thompson. The USGS, PCMSC processed these data and produced a series of bathymetric surfaces and acoustic-backscatter images for scientific research purposes. This data release provides a 10-m resolution bathymetry surface and a 10-m resolution acoustic backscatter image. In... Categories: Data; Types: Citation; Tags: Bathymetry, Bathymetry, Bathymetry and Elevation, CMGP, Catalina Basin, All tags... Geology, Geomorphology, Geophysics, Marine Geology, Multibeam sonar, Pacific, Pacific Coastal and Marine Science Center, Seafloor Topography, U.S. Geological Survey, USGS, environment, geoscientificInformation, imageryBaseMapsEarthCover, inlandWaters, sea-floor acoustic reflectivity, Fewer tags Sediment transport and aquatic vegetation data from three locations in the Sacramento-San Joaquin Delta, California, 2017 to 2018 We measured currents, suspended-sediment concentration (SSC), bed sediment characteristics, and vegetation biomass density in the Sacramento-San Joaquin Delta in 2017-2018, as part of a project investigating the influence of invasive aquatic vegetation (IAV) on flow and sediment flux. This data release includes data from three sites: Lindsey Slough (April 2017), Middle River (March 2018) and the lower Mokelumne River (March 2018). At all three sites the IAV is dominated by the submerged species Egeria densa. Station locations, instrumentation, and measured variables are detailed on pages for each data type. IAV a poses a growing hazard to navigation, infrastructure, and ecosystems in the Sacramento-San Joaquin... Bathymetry, acoustic-backscatter, and time-series datasets collected between 2014 and 2016 of a field of crescent-shaped rippled scour depressions in northern Monterey Bay, California Between November 2014 and June 2016 the U.S. Geological Survey, Pacific Coastal and Marine Science Center (PCMSC) conducted eight repeat, high-resolution bathymetry and acoustic-backscatter surveys of a small patch of seafloor offshore Santa Cruz in northern Monterey Bay, California. PCMSC also collected oceanographic time-series data over the same two-year period. This data release provides the eight bathymetry and acoustic-backscatter datasets, the time-series data, and FGDC metadata. Tags: Geophysics Orthomosaic imagery for Whiskeytown Lake and surrounding area, northern California, 2020-11-10 This portion of the data release presents an RGB orthomosaic image of Whiskeytown Lake and the surrounding area derived from Structure from Motion (SfM) processing of aerial imagery acquired on 2020-11-10. The orthomosaic is available in a high-resolution 5-centimeter (cm) version, as well as a medium-resolution 25 cm version. The high-resolution version is divided into two tiles (east and west) to reduce file download sizes. All imagery is provided in a three-band cloud optimized GeoTIFF format, with 8-bit unsigned integer values compressed using high-quality JPEG compression. The raw imagery used to create the orthomosaic image was acquired from a manned aircraft on 2020-11-10. The acquisition flight was conducted... Tags: Bathymetry and Elevation, CMHRP, Carr fire, Coastal and Marine Hazards and Resources Program, PCMSC, All tags... Pacific Coastal and Marine Science Center, State of California, U.S. Geological Survey, USGS, Whiskeytown Lake, Whiskeytown-Shasta-Trinity National Recreation Area, aerial photography, elevation, fires, fragile ecosystems, geomorphology, image mosaics, photography, remote sensing, remote sensing, reservoir, topographic maps, topography, wildfires, Fewer tags Chirp sub-bottom data collected in 2019 in Whiskeytown Lake, California during USGS field activity 2018-686-FA High-resolution chirp sub-bottom data were collected by the U.S. Geological Survey, Pacific Coastal and Marine Science Center in May of 2019 in Whiskeytown Lake, California using an Edgetech SB-512i sub-bottom profiler. These data were collected to measure possible debris flows into the lake during the 2018-2019 rainy season following the July-August 2018 Carr fire that burned vegetation around the entire lake. Post-fire hillslope sediment yields are commonly substantially greater than pre-fire yields, but the degree to which they increase can vary substantially. Effects of wildfire on sediment yield have important implications for hazards (debris-flow risk), ecosystem disturbance and recovery, and downstream water... Tags: CMHRP, Coastal and Marine Hazards and Resources Program, Distributions, Geomorphology, Geophysics, All tags... Marine Geology, PCMSC, Pacific Coastal and Marine Science Center, State of California, Substrate, U.S. Geological Survey, USGS, Water Resources, Whiskeytown Lake, acoustic methods, geophysics, geoscientificinformation, geospatial datasets, lakebed, lakes, mapping, marine geophysics, seismic reflection profiling, sub-bottom profiling, Fewer tags High-resolution bathymetry and acoustic-backscatter data collected in 2004, 2005, 2007, and 2010 in Skagit Bay, Washington This data release provides the U.S. Geological Survey (USGS), Pacific Coastal and Marine Science Center (PCMSC) 2004, 2005, 2007, and 2010 bathymetry data that was collected in Skagit Bay, Washington as well as a merged 2005-2010 bathymetry grid. Also, this data release provides the acoustic-backscatter as a merged 2005-2010 backscatter image. All bathymetry grids are provided at 1-m spatial resolution, while the acoustic-backscatter image is provided at 5-m resolution. All files have accompanying FGDC metadata. In 2004, 2005, 2007, and 2010 the USGS, PCMSC collected bathymetry and acoustic backscatter data in Skagit Bay, Washington using an interferometric bathymetric sidescan sonar system mounded to the USGS R/V... Categories: Data; Types: Citation; Tags: Bathymetry, Bathymetry, Bathymetry and Elevation, CMGP, Coastal and Marine Geology Program, All tags... Geology, Geomorphology, Geophysics, PCMSC, Pacific Coastal and Marine Science Center, Pacific Ocean, Puget Sound, Seafloor Topography, U.S. Geological Survey, USGS, environment, geoscientificInformation, imageryBaseMapsEarthCover, sea-floor acoustic reflectivity, seabed, Fewer tags Bathymetry, topography and orthomosaic imagery for Whiskeytown Lake, northern California (ver. 2.0, July 2021) The Carr Fire ignited in northern California on July 23, 2018, and over the following six weeks burned almost 300,000 acres (approximately half on federal lands), resulting in a federal major-disaster declaration (DR-4382). Approximately 93 percent of the area within Whiskeytown National Recreation Area was burned extensively during the Carr Fire, including all of the landscape surrounding and draining into Whiskeytown Lake. Whiskeytown Lake, a federally managed reservoir, therefore acted as a sediment trap for material eroded from hillslopes and streambeds in the aftermath of the Carr Fire. The U.S. Geological Survey has measured topographic change associated with sediment deposition and erosion in and around Whiskeytown... Tags: Bathymetry and Elevation, CMHRP, Carr fire, Coastal and Marine Hazards and Resources Program, PCMSC, All tags... Pacific Coastal and Marine Science Center, Seafloor Topography, U.S. Geological Survey, USGS, aerial photography, bathymetry, bathymetry measurement, elevation, field observation, geomorphology, geoscientificinformation, geospatial datasets, image mosaics, lakefloor, marine geophysics, remote sensing, reservoir, sea-floor characteristics, sonar, topographic maps, topography, wildfires, Fewer tags Orthomosaic imagery for Whiskeytown Lake and surrounding area, northern California, 2019-11-12 This portion of the data release presents an RGB orthomosaic image of Whiskeytown Lake and the surrounding area derived from Structure from Motion (SfM) processing of aerial imagery acquired on 2019-11-12. The orthomosaic is available in a high-resolution 6-centimeter (cm) version, as well as a medium-resolution 25 cm version. The high-resolution version is divided into two tiles (east and west) to reduce file download sizes. All imagery is provided in a three-band cloud optimized GeoTIFF format, with 8-bit unsigned integer values compressed using high-quality JPEG compression. The raw imagery used to create the orthomosaic image was acquired from a manned aircraft on 2019-11-12. The acquisition flight was conducted... Tags: Bathymetry and Elevation, CMHRP, Carr fire, Coastal and Marine Hazards and Resources Program, PCMSC, All tags... Pacific Coastal and Marine Science Center, State of California, U.S. Geological Survey, USGS, Whiskeytown Lake, Whiskeytown-Shasta-Trinity National Recreation Area, aerial photography, elevation, fires, fragile ecosystems, geomorphology, image mosaics, photography, remote sensing, remote sensing, reservoir, topographic maps, topography, wildfires, Fewer tags Bathymetry and backscatter from 2013 interferometric swath bathymetry systems survey of Columbia River Mouth, Oregon and Washington Introduction High-resolution swath bathymetry and backscatter were collected in the mouth of the Columbia River (MCR) as part of the Office of Naval Research (ONR) funded River and Inlet Dynamics Experiment in 2013. The goal of the U.S. Geological Survey’s component of the research was to evaluate the various hydrodynamic and sediment transport processes in the Columbia River estuary entrance using a combination of field observations coupled with Delft3D model simulations. The MCR is a dynamic estuary inlet with large waves, large tidal currents, and a significant river discharge, resulting in strong estuarine circulation. The field component of the study consisted of an intensive in-situ experiment including bottom-mounted... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Backscatter, Bathymetry, CMG, CMGP, Coastal and Marine Geology Program, All tags... Columbia River, Geophysics, PCMSC, Pacific Coastal and Marine Science Center, Pacific Ocean, State of Oregon, State of Washington, U.S. Geological Survey, USGS, data release, Fewer tags Grain-size data for sediment samples collected in Whiskeytown Lake, northern California, in 2018 and 2019 Note: this data release has been depecrated. Find the updated version here: https://doi.org/10.5066/P9TUTK7J The Carr Fire ignited in northern California in July 2018, and ultimately burned almost 300,000 acres (approximately half on federal lands), resulting in a federal major-disaster declaration (DR-4382). Approximately 93% of the area within Whiskeytown National Recreation Area was burned extensively during the Carr Fire, including all of the landscape surrounding and draining into Whiskeytown Lake. Whiskeytown Lake, a federally managed reservoir, subsequently acted as a sediment trap for material eroded from hillslopes and streambeds in the aftermath of the Carr Fire. The U.S. Geological Survey measured topographic... Categories: Data; Tags: Assessments, CMHRP, Coastal and Marine Hazards and Resources Program, Material Resources, PCMSC, All tags... Pacific Coastal and Marine Science Center, Sedimentology, State of California, U.S. Geological Survey, USGS, Whiskeytown National Recreation Area, geoscientificInformation, grain size, land surface characteristics, reservoir sedimentation, sediment, sediment grain size, Fewer tags Multibeam bathymetry and acoustic-backscatter data collected in 2017 and 2018 of Noyes Submarine Canyon and vicinity, southeast Alaska This data release provides U.S. Geological Survey (USGS), Pacific Coastal and Marine Science Center (PCMSC) and National Oceanic and Atmospheric Administration (NOAA) 2017 and 2018 bathymetry and acoustic-backscatter data collected on the Noyes Submarine Canyon and vicinity in southeast Alaska. In 2017 and 2018 the NOAA survey vessel Fairweather collected bathymetry and acoustic-backscatter data using a Kongsberg EM-710 multibeam echosounder (NOAA survey D00208 and NOAA survey D00245). The surveys were conducted to map the offshore expression of the Queen Charlotte-Fairweather fault system that runs for approximately 500 kilometers off the coast of southeast Alaska and British Columbia. These surveys were part of... Tags: Bathymetry, Bathymetry, Bathymetry and Elevation, CMGP, Coastal and Marine Geology Program, All tags... Geology, Marine Geology, Noyes submarine canyon, PCMSC, Pacific Coastal and Marine Science Center, Seafloor Topography, State of Alaska, U.S. Geological Survey, USGS, environment, geoscientificInformation, imageryBaseMapsEarthCover, sea-floor acoustic reflectivity, seabed, Fewer tags Grain size, bulk density, and organic carbon of sediment cores from three locations in the Sacramento-San Joaquin Delta, California, 2017 to 2018 Bed sediment samples were collected in Lindsey Slough in April 2017, and Middle River and the Mokelumne River in March 2018, to analyze for sediment properties, including bulk density, particle size distribution, and percent organic carbon. Sediment samples were collected within the vegetation with push corers deployed from a small vessel, and in the unvegetated channel with a Gomex box corer, which was subsampled with three push cores per Gomex core. Data are provided in a comma-delimited values spreadsheet. These data were collected as part of a cooperative project, with the USGS California Water Science Center and the California Department of Fish and Wildlife, on the effects of invasive aquatic vegetation on... Categories: Data; Tags: CMHRP, Coastal and Marine Hazards and Resources Program, Mokelumne River, Oceans, PCMSC, All tags... Pacific Coastal and Marine Science Center, Sacramento-San Joaquin Delta, Sediment, Sedimentation, State of California, Substrate, U.S. Geological Survey, USGS, bulk density, carbon, dissolved organic compounds, grab sampling, grain-size analysis, push coring, sea-floor characteristics, sediment transport, unconsolidated deposits, Fewer tags Multibeam bathymetry and acoustic backscatter data collected in 2016 for Lake Crescent, Olympic National Park, Washington In February 2016 the U.S. Geological Survey, Pacific Coastal and Marine Science Center in cooperation with North Carolina State University and the National Park Service collected multibeam bathymetry and acoustic backscatter data in Lake Crescent located in Olympic National Park, Washington. These data were collected to support geologic hazard studies within the lake including mapping submarine landslides and faulting. Data were collected using a Reson 7111 multibeam echosounder pole-mounted to the 36-foot USGS R/V Parke Snavely. This USGS data release provides the processed bathymetry data in ASCIIRaster format, the acoustic backscatter data in TIFF format, as well as PDF maps of shaded relief bathymetry and acoustic... Categories: Data; Types: Citation; Tags: Bathymetry, Bathymetry, Bathymetry and Elevation, CMGP, Geology, All tags... Lake Crescent, Multibeam sonar, Olympic National Park, Pacific Coastal and Marine Science Center, Seafloor Topography, State of Washington, U.S. Geological Survey, USGS, environment, geoscientificInformation, imageryBaseMapsEarthCover, inlandWaters, lake bed, sea-floor acoustic reflectivity, Fewer tags Bathymetry, topography, and acoustic backscatter data, and a digital elevation model (DEM) of the Cache Slough Complex and Sacramento River Deep Water Ship Channel, Sacramento-San Joaquin Delta, California This data release presents bathymetric and topographic data from surveys performed between 2017 and 2018 in the Cache Slough Complex and the Sacramento River Deep Water Ship Channel (DWSC), northern Sacramento-San Joaquin Delta, California. The shallow, highly vegetated aquatic habitats of this region necessitated a variety of survey platforms and techniques (fig. 1). In the deeper channels, swath bathymetry data were collected using a 234.5 kHz interferometric sidescan sonar pole-mounted to the 26-ft R/V San Lorenzo. In smaller channels and shallow areas not accessible with the larger survey vessel, swath bathymetry data were acquired with Kelpfly, a personal watercraft (PWC) equipped with a 468 kHz interferometric... Tags: Geomorphology Topographic digital surface model (DSM) for Whiskeytown Lake and surrounding area, 2019-11-12 This portion of the data release presents a digital surface model (DSM) and hillshade of Whiskeytown Lake and the surrounding area derived from Structure from Motion (SfM) processing of aerial imagery acquired on 2019-11-12. Unlike a digital elevation model (DEM), the DSM represents the elevation of the highest object within the bounds of a cell. Vegetation, buildings and other objects have not been removed from the data. In addition, data artifacts resulting from noise and vegetation in the original imagery have not been removed. However, in unvegetated areas such as reservoir shorelines and deltas, the DSM is equivalent to a DEM because it represents the ground surface elevation. The raw imagery used to create... Tags: Bathymetry and Elevation, CMHRP, Carr fire, Coastal and Marine Hazards and Resources Program, PCMSC, All tags... Pacific Coastal and Marine Science Center, State of California, U.S. Geological Survey, USGS, Whiskeytown Lake, Whiskeytown-Shasta-Trinity National Recreation Area, aerial photography, elevation, fires, fragile ecosystems, geomorphology, image mosaics, photography, remote sensing, remote sensing, reservoir, topographic maps, topography, wildfires, Fewer tags Multibeam bathymetry and acoustic-backscatter data collected in 2015 near Cross Sound, southeast Alaska, during field activity 2015-629-FA In 2015 the U.S. Geological Survey, Pacific Coastal and Marine Science Center, in cooperation with the Alaska Department of Fish and Game (ADFG), collected bathymetry and acoustic-backscatter data near Cross Sound in southeast Alaska using a Reson 7111 multibeam echosounder mounded to the ADFG R/V Solstice. The bathymetry and acoustic-backscatter data are provided as GeoTIFFs with 10-m spatial resolution; the navigational tracklines are provided in a polyline shapefile. All files have accompanying FGDC metadata. The survey was conducted to map the offshore expression of the Queen Charlotte fault system that runs for approximately 500 kilometers off the coast of southeast Alaska and British Columbia. This was the... Tags: Bathymetry, Bathymetry, Bathymetry and Elevation, CMGP, Coastal and Marine Geology Program, All tags... Cross Sound, Geology, PCMSC, Pacific Coastal and Marine Science Center, Seafloor Topography, State of Alaska, U.S. Geological Survey, USGS, environment, geoscientificInformation, imageryBaseMapsEarthCover, sea-floor acoustic reflectivity, seabed, Fewer tags 1 2 »