Geographer
Email:
tfregoso@usgs.gov
Office Phone:
831-460-7528
Fax:
831-427-4748
ORCID:
0000-0001-7802-5812
Location
400 Natural Bridges Drive
Santa Cruz
, CA
95060
US
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Bathymetric change grids covering the periods of time from 1934 to 2011, from 2011 to 2018, and from 1934 to 2018 are presented. The grids cover a portion of the Mokelumne River, California, starting at its terminus at the San Joaquin River and moving upriver to the confluences of the north and south branches of the Mokelumne. Positive grid values indicate accretion, or a shallowing of the surface bathymetric surface, and negative grid values indicate erosion, or a deepening of the bathymetric surface. Bathymetry data sources include the U.S. Geological Survey, California Department of Water Resources, and NOAA's National Ocean Service.
Categories: Data;
Types: Downloadable,
GeoTIFF,
Map Service,
Raster;
Tags: Andrus Island,
Bathymetry and Elevation,
Bouldin Island,
CMHRP,
California, All tags...
Coastal and Marine Hazards and Resources Program,
Georgiana Slough,
Inlandwaters,
Mokelumne River,
PCMSC,
Pacific Coastal and Marine Science Center,
River Channel,
Sacramento County,
San Joaquin County,
San Joaquin River,
U.S. Geological Survey,
USGS,
bathymetry,
erosion,
estuarine processes,
geospatial datasets,
sediment transport,
sedimentation, Fewer tags
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Bathymetric change grids covering the periods of time from 1992 to 1998 and from 1994 to 2004 are presented. The grids cover a portion of the Sacramento River near Rio Vista, California, extending partially upstream on Cache and Steamboat sloughs by the Ryer Island Ferry, as well as continuing up the Sacramento River towards Isleton. Positive grid values indicate accretion, or a shallowing of the surface bathymetric surface, and negative grid values indicate erosion, or a deepening of the bathymetric surface. Bathymetry data sources include the U.S. Army Corps of Engineers, California Department of Water Resources, and NOAA�s National Ocean Service.
Categories: Data;
Types: Downloadable,
GeoTIFF,
Map Service,
Raster;
Tags: Bathymetry and Elevation,
Brannan Island,
CMHRP,
Cache Slough,
California, All tags...
Coastal and Marine Hazards and Resources Program,
Inlandwaters,
PCMSC,
Pacific Coastal and Marine Science Center,
Rio Vista,
River Channel,
Ryer Island,
Sacramento County,
Sacramento River,
San Joaquin River,
Steamboat Slough,
U.S. Geological Survey,
USGS,
bathymetry,
erosion,
estuarine processes,
geospatial datasets,
sediment transport,
sedimentation, Fewer tags
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This metadata describes a digital elevation model (DEM) created from bathymetric and topographic data collected between 2017 and 2019 in the Sacramento River Deep Water Ship Channel (DWSC), northern Sacramento-San Joaquin Delta, California. We merged the newly collected bathymetric and topographic data presented in this data release (DOI:10.5066/P9AQSRVH) with 2019 surveys by the California Department of Water Resources (DWR) and 2017 USGS Sacramento Delta Lidar, to produce a seamless digital elevation model of the DWSC at a grid resolution of 1 m.
Tags: Bathymetry,
Bathymetry and Elevation,
CMHRP,
Coastal and Marine Hazards and Resources Program,
PCMSC, All tags...
Pacific Coastal and Marine Science Center,
Sacramento River,
Sacramento River Deep Water Ship Channel,
Sacramento-San Joaquin Delta,
San Joaquin River,
Seafloor Topography,
State of California,
U.S. Geological Survey,
USGS,
altimetry,
bathymetry,
bathymetry measurement,
digital elevation models,
field observation,
geographic information systems,
geoscientificInformation,
geospatial datasets,
lidar,
marine geophysics,
multibeam sonar,
sea-floor characteristics,
seabed,
topographic mapping,
topography, Fewer tags
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This data release provides a series of five bathymetric change grids generated from historical bathymetric surveys collected in San Pablo Bay, CA from the 1856 to 1983. The National Ocean Service (NOS) and its predecessor, the United States Coast and Geodetic Survey, collected hydrographic surveys in 1856, 1887, 1898, 1922, 1951, and 1983. Surface modeling software was used to generate bathymetric DEMs of each of these surveys. The bathymetric DEMs were then adjusted to account for gridding interpolation bias and changes in sea level through time. The adjusted DEMs for consecutive surveys were then differenced to reveal the amount of sediment erosion and deposition and changes from human activities (e.g., dredging,...
Categories: Data;
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: Bathymetry and Elevation,
Central San Francisco Bay,
Digital Elevation Model (DEM),
GPS measurement,
Global Positioning System (GPS) observations, All tags...
San Francisco Bay,
San Pablo Bay,
South San Francisco Bay,
Suisun Bay,
bathymetry,
digital elevation models,
elevation,
geographic information systems,
geographic information systems (GIS),
geospatial datasets,
inlandWaters,
single-beam echo sounder,
topographic mapping,
topography, Fewer tags
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Here we present a time series of San Francisco Bay bathymetric grids created from historical hydrographic surveys collected by the National Ocean Service (NOS) and its predecessor, the United States Coast and Geodetic Survey, from the 1850s to 1980s and one additional survey of south San Francisco Bay collected in 2005 by Sea Surveyor, Inc. Using surface modeling software, the soundings from each survey were supplemented with hand-drawn contours and shorelines obtained from topographic sheets to generate bathymetric DEMs at a horizontal resolution of 25 or 50 meters. The DEMs are divided into four subembayments: Central, South, San Pablo, and Suisun Bays and each subembayment was surveyed either five or six times...
Categories: Data;
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: Bathymetry and Elevation,
Central San Francisco Bay,
GPS measurement,
Geomorphology,
Global Positioning System (GPS) observations, All tags...
San Francisco Bay,
San Pablo Bay,
South San Francisco Bay,
Suisun Bay,
bathymetry,
digital elevation models,
digital elevation models (DEMs),
elevation,
geographic information systems,
geographic information systems (GIS),
geospatial datasets,
inlandWaters,
single-beam echo sounder,
topographic mapping,
topography, Fewer tags
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