Theresa Fregoso

Bathymetric change analyses of the southernmost portion of the Mokelumne River, California, from 1934 to 2018

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

Bathymetric change analyses of the Sacramento River near Rio Vista, California, and the junction of Cache and Steamboat sloughs, from 1992 to 2004

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

Digital elevation model (DEM) of the Sacramento River Deep Water Ship Channel (DWSC), Sacramento-San Joaquin Delta, California

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

Bathymetric DEM of the Sacramento River, from the Feather River to Knights Landing, California in February 2011

This part of the data release presents a digital elevation model (DEM) created from bathymetry data collected on February 1, 2011, in the Sacramento River from the confluence of the Feather River to Knights Landing. The data were collected by the USGS Pacific Coastal and Marine Science Center (PCMSC) team with collaboration and funding from the U.S. Army Corps of Engineers. This project used interferometric sidescan sonar to characterize the riverbed and channel banks along a 12 mile reach of the Sacramento River, California (River Mile 79 through River Mile 91) to aid in the understanding of fish response to the creation of safe habitat associated with levee restoration efforts in two 1.5 mile reaches of the Sacramento...

Categories: Data; Types: Citation; Tags: Bathymetry and Elevation, Echo Sounders, Feather River, GPS (Global Positioning System), Geophysics, All tags... Knights Landing, Sacramento River, Water Depth, Woodland, bathymetry, digital elevation models, elevation, interferometric sonar, levee, multibeam echo sounder, real-time monitoring and reporting, river, sea-floor acoustic reflectivity, sea-floor characteristics, sidescan sonar, Fewer tags

Projected coastal flooding extents for 1-, 20-, and 100-year return interval storms and 0.00, +0.25, +0.50, +1.00, +1.50, +2.00, and +3.00 meter sea-level rise scenarios in American Samoa

This data release provides flooding extent polygons based on sea-level rise and wave-driven total water levels for the coast of American Samoa's most populated islands of Tutuila, Ofu-Olosega, and Tau. Oceanographic, coastal engineering, ecologic, and geospatial data and tools were combined to evaluate the increased risks of storm-induced coastal flooding due to climate change and sea-level rise. We followed risk-based valuation approaches to map flooding due to waves and storm surge at 10-m2 resolution along these islands coastlines for annual (1-year), 20-year, and 100-year return-interval storm events and +0.25 m, +0.50 m, +1.00 m, +1.50 m, +2.00 m, and +3.00 m sea-level rise scenarios.

Categories: Data; Tags: CMHRP, Climate Change, Coastal Processes, Coastal and Marine Hazards and Resources Program, Earth sciences, All tags... Effects of climate change, Environmental Equity, Environmental Justice, Flooding, Floods, Geospatial Datasets, Mathematical modeling, Ofu Island, Olosega Island, PCMSC, Pacific Coastal and Marine Science Center, Physical Habitats and Geomorphology, Predictions, Sea level change, Sea-level Change, Spatial Analysis, Storms, Tau Island, Territory of American Samoa, Tutuila Island, U.S. Geological Survey, USGS, Waves, environment, geoscientificInformation, oceans, Fewer tags