https://www.usgs.gov/centers/pcmsc
Location
2885 Mission Street
Santa Cruz
, CA
95060
USA
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This table contains measured and modeled postfire debris flow volumes alongside the associated sources for debris flow documentation, locations, and volumes. We conducted a search of scientific literature and news media reports to find documentation of debris flows that may have followed all wildfires greater than 100 square kilometers that occurred between 1984 and 2021 in California. The wildfires listed are all the fires we found that had documented postfire debris flows. Some fires had field-measurements of debris flow volume. Where field-measurements of volume did not exist, we used model data on postfire debris-flow likelihood and volume from U.S. Geological Survey Emergency Assessment of Post-Fire Debris-Flow...
Categories: Data;
Tags: CMHRP,
Coastal and Marine Hazards and Resources Program,
PCMSC,
Pacific Coastal and Marine Science Center,
Physical Habitats and Geomorphology, All tags...
State of California,
U.S. Geological Survey,
USGS,
erosion,
fires,
geoscientificInformation,
geospatial datasets,
sediment erosion, Fewer tags
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This portion of the USGS data release presents bathymetry data collected during surveys performed in the Columbia River littoral cell, Washington and Oregon in 2014 (USGS Field Activity Number 2014-631-FA). Bathymetry data were collected using four personal watercraft (PWCs) equipped with single-beam sonar systems and global navigation satellite system (GNSS) receivers. The sonar systems consisted of an Odom Echotrac CV-100 single-beam echosounder and 200 kHz transducer with a 9 degree beam angle. Raw acoustic backscatter returns were digitized by the echosounder with a vertical resolution of 1.25 cm. Depths from the echosounders were computed using sound velocity profiles measured using a YSI CastAway CTD during...
Categories: Data;
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: Bathymetry and Elevation,
CMHRP,
Clatsop County,
Coastal and Marine Hazards and Resources Program,
Columbia River, All tags...
Echo Sounders,
GPS (Global Positioning System),
GPS measurement,
Global Positioning System (GPS) observations,
Grays Harbor County,
PCMSC,
Pacific Coastal and Marine Science Center,
Pacific County,
Pacific Ocean,
U.S. Geological Survey,
USGS,
Water Depth,
bathymetry,
bathymetry measurement,
elevation,
single-beam echo sounder, Fewer tags
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This dataset includes swell-filtered, high-resolution seismic-reflection data jointly collected by the U.S. Geological Survey (USGS) and Oregon State University in 2010, between Shelter Cove and Fort Bragg in northern California.
Types: Citation;
Tags: Bathymetry,
CMHRP,
Coastal and Marine Hazards and Resources Program,
Continental Margins,
Fort Bragg, All tags...
Humboldt County,
Mendocino County,
Noyo Canyon,
PCMSC,
Pacific Coastal and Marine Science Center,
Pacific Ocean,
Point Delgada,
Punta Gorda,
Shelter Cove,
State of California,
U.S. Geological Survey,
USGS,
USGS:56e84240e4b0f59b85d71294,
distributions,
geoscientificInformation,
marine geophysics,
marine geophysics,
oceans,
seismic reflection methods,
seismic reflection profiling,
seismic-reflection,
sub-bottom profiling,
substrate, Fewer tags
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An unmanned aerial system (UAS) was used to acquire high-resolution imagery of the intertidal zone at West Whidbey Island, Washington on June 4, 2019. This imagery was processed using structure-from-motion (SfM) photogrammetric techniques to derive a high-resolution digital surface model (DSM), orthomosaic imagery, and topographic point clouds. In order to maximize the extent of the subaerially exposed area, the survey was timed to coincide with a spring low tide occurring at approximately 18:02 Universal Coordinated Time (UTC) (11:02 Pacific Daylight Time (PDT)), with a predicted water level of -0.74 meters below mean lower-low water (MLLW) at the Sunset Beach NOAA subordinate tide station (station ID 9447951)....
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