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Digital Surface Models (DSMs) of the Whale's Tail Marsh region, South San Francisco Bay, CA This portion of the data release presents digital surface models (DSM) of the Whale's Tail Marsh region of South San Francisco Bay, CA. The DSMs have resolutions of 5 centimeters per pixel and were derived from structure-from-motion (SfM) processing of repeat aerial imagery collected from fixed-wing aircraft. Unlike a digital elevation model (DEM), a DSM represents the elevation of the highest object within the bounds of a cell. Vegetation, structures, and other objects have not been removed from the data. The raw imagery used to create these elevation models was acquired from an approximate altitude of 427 meters (1,400 feet) above ground level (AGL), using a Hasselblad A6D-100c camera fitted with an HC 80 lens,... Categories: Data; Tags: Alameda County, Alameda Creek, Bathymetry and Elevation, CHMRP, Coastal and Marine Hazards and Resources Program, All tags... Mount Eden Creek, PCMSC, Pacific Coastal and Marine Science Center, San Francisco Bay, SfM, State of California, Structure-from-motion, U.S. Geological Survey, USGS, aerial and satellite photography, aerial photography, altimetry, elevation, geomorphology, geoscientificInformation, geospatial datasets, image mosaics, orthophotography, photography, remote sensing, remote sensing, structure from motion, topographic maps, topography, Fewer tags Geochemistry of fine sediment from San Francisco Bay shoals (2012) and tributaries (2010, 2012, 2013) Elemental chemistry and weight percent of the less than 0.063 mm fine sediment fraction are reported for surface sediments from shoals, the ebb tide delta, local tributaries, and inland rivers that carry sediment to San Francisco Bay, California. Categories: Data; Tags: Alameda Creek, CMHRP, Coastal and Marine Hazards and Resources Program, Corte Madera Creek, Fort Funston, All tags... Geochemistry, Guadelupe River, Marine Geology, Napa River, PCMSC, Pacific Coastal and Marine Science Center, Petaluma River, Sacramento River, San Francisco Bay, San Francisquito Creek, San Joaquin River, San Pablo Bay, Sediment geochemistry, Sonoma Creek, South Bay, Substrate, Suisun Bay, U.S. Geological Survey, USGS, Wildcat Creek, environment, geochemistry, geoscientificInformation, grab sampling, mass spectroscopy, rare earth elements, Fewer tags Bathymetric change of San Pablo Bay, California: 1983 to 2015 This 25-m-resolution surface presents bathymetric change of San Pablo Bay, California, from 1983 to 2015. This surface compares a 1-m-resolution digital elevation model (DEM) of the northern portion of San Francisco Bay (Fregoso and others, 2020), comprised of bathymetry data in the San Pablo Bay region from the time period referred to as the 2010s because the majority of the surveys were in that decade, to a 25-m-resolution bathymetric DEM of San Pablo Bay comprised of historic surveys from 1983 to 1986 (referred to as the 1980s because the majority of the surveys were in that decade). The creation of this change surface involved the resampling of the 1-m-resolution 2010s DEM to match the 25-m-resolution of the... Categories: Data; Tags: Bathymetry and Elevation, GPS measurement, Global Positioning System (GPS) observations, San Francisco Bay, San Pablo Bay, All tags... bathymetry, coastal processes, digital elevation models, elevation, geographic information systems, geographic information systems (GIS), geospatial datasets, inlandWaters, multibeam echo sounder, multibeam sonar, single-beam echo sounder, single-beam echo sounder, topographic mapping, topography, Fewer tags 210Pb and 137Cs measurements from core 721-1 obtained in 2002 off San Francisquito Creek in South San Francisco Bay This data release provides 210Pb and 137Cs measurements in sediments of a core obtained off San Francisquito Creek in South San Francisco Bay. Categories: Data; Tags: CMHRP, Coastal and Marine Hazards and Resources Program, Hooks Point, PCMSC, Pacific Coastal and Marine Science Center, All tags... San Francisco Bay, San Francisquito Creek, Substrate, U.S. Geological Survey, USGS, bay, chemical analysis, environment, geochemistry, geoscientificInformation, gravity coring, marine chemistry, radiometric dating, sediment deposition, sediment geochemistry, society, Fewer tags Biomass/Remote Sensing dataset: 30m resolution tidal marsh biomass samples and remote sensing data for six regions in the conterminous United States Remote sensing based maps of tidal marshes, both of their extents and carbon stocks, have the potential to play a key role in conducting greenhouse gas inventories and implementing climate mitigation policies. Our objective was to generate a single remote sensing model of tidal marsh aboveground biomass and carbon that represents nationally diverse tidal marshes within the conterminous United States (CONUS). To meet this objective we developed the first national-scale dataset of aboveground tidal marsh biomass, species composition, and aboveground plant carbon content (%C) from six CONUS regions: Cape Cod, MA, Chesapeake Bay, MD, Everglades, FL, Mississippi Delta, LA, San Francisco Bay, CA, and Puget Sound, WA.... Categories: Data; Tags: C-band synthetic aperture radar, Cape Cod, Chesapeake Bay, National greenhouse gas inventory, Puget Sound, All tags... Remote sensing, San Francisco Bay, St Mary Parish, Terrebonne Parish, The Everglades, aboveground carbon stocks, multispectral imagery, plant biomass, plant functional type, tidal marsh biomass, Fewer tags Small Mammal Surveys from Northern San Francisco Bay: 1998-2014 This datasets summarizes small mammal trapping efforts that USGS San Francisco Bay Estuary Field Station has led, co-led, or supervised, to detect and monitor the endangered salt marsh harvest mouse (Reithrodontomys raviventris) in the northern reaches of San Francisco Bay from 1998-2014. As the salt marsh harvest mouse is listed as endangered under the Endangered Species Act, sensitive location information can be made available upon request by contacting the dataset point of contact. These data support the following publication: Marcot, B.G., Woo, I., Thorne, K.M., Freeman, C.M., and Guntenspergen, G.R., 2020. Habitat of the endangered salt marsh harvest mouse (Reithrodontomys raviventris) in San Francisco Bay.... Categories: Data; Tags: San Francisco Bay, San Pablo Bay, USGS Science Data Catalog (SDC), Wildlife Biology, biota, All tags... capturing (animals), endangered species, habitat use, habitats, mammals, small mammal assemblage, vegetation, wildlife, Fewer tags San Francisco Bay Tidal Marsh Avian Predator Surveys, 2010 This dataset contains avian survey observations across four tidal marsh areas around San Francisco Bay. Multiple surveys were conducted around both high and low tides during the winter of 2010/11. Each survey alternated between scan and focals. During scans, all observable birds were counted. During focals, the behavior of a single, randomly selected bird was observed. Water level data was collected concurrently at each site and is provided with the avian survey data. These data support the following publication: Thorne, K.M., Spragens, K.A., Buffington, K.J., Rosencranz, J.A. and Takekawa, J., 2019. Flooding regimes increase avian predation on wildlife prey in tidal marsh ecosystems. Ecology and evolution, 9(3),... Categories: Data; Tags: Ecology, Emergent Tidal Marsh, Petaluma River, San Francisco Bay, USGS Science Data Catalog (SDC), All tags... Wildlife Biology, biota, birds, carnivores, flooding, sea-level change, Fewer tags Bathymetric change of Suisun Bay, California: 1988 to 2016 This 25-m-resolution surface presents bathymetric change of Suisun Bay, California, from 1988 to 2016. This surface compares a 1-m-resolution digital elevation model (DEM) of the northern portion of San Francisco Bay (Fregoso and others, 2020), comprised of bathymetry data in the Suisun region from the time period referred to as the 2010s because the majority of the surveys were in that decade, to a 25-m-resolution bathymetric DEM of Suisun Bay comprised of historic surveys from 1988 to 1990 (referred to as the 1990s because the majority of the surveys were in that decade). The creation of this change surface involved the resampling of the 1-m-resolution 2010s DEM to match the older 25-m-resolution of the 1990s... Categories: Data; Tags: Bathymetry and Elevation, GPS measurement, Global Positioning System (GPS) observations, San Francisco Bay, Suisun Bay, All tags... bathymetry, coastal processes, digital elevation models, elevation, geographic information systems, geographic information systems (GIS), geospatial datasets, inlandWaters, multibeam echo sounder, multibeam sonar, single-beam echo sounder, single-beam echo sounder, topographic mapping, topography, Fewer tags Grain size, bulk density, and organic carbon of sediment cores from San Pablo Bay and Grizzly Bay, California, 2019 Bed sediment samples were collected in San Pablo Bay and Grizzly Bays on eight days from June through November 2019, to analyze for sediment properties including bulk density, particle size distribution, and percent organic carbon. Sediment samples were collected from a small vessel near pre-established USGS instrument moorings using a Gomex box corer that was subsampled with three push cores (37 mm in diameter) per Gomex core. Six subsamples were collected from the top 5 centimeters (cm) of each push core, a few push cores included the top 8 cm. The top two subsamples were each 0.5 cm thick, and all following subsamples were each 1 cm thick. Push core samples from the first, third, and fifth centimeter depth were... Categories: Data; Tags: CMHRP, Coastal and Marine Hazards and Resources Program, Grizzly Bay, PCMSC, Pacific Coastal and Marine Science Center, All tags... San Francisco Bay, San Pablo Bay, Sediment, State of California, Substrate, U.S. Geological Survey, USGS, bulk density, carbon, dissolved organic compounds, grab sampling, grain-size analysis, oceans, push coring, sea-floor characteristics, sediment transport, unconsolidated deposits, Fewer tags Footprints and producers of source data used to create southern portion of the high-resolution (1 m) San Francisco Bay, California, digital elevation model (DEM) Polygon shapefile showing the footprint boundaries, source agency origins, and resolutions of compiled bathymetric digital elevation models (DEMs) used to construct a continuous, high-resolution DEM of the southern portion of San Francisco Bay. Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Alviso Slough, Bathymetry and Elevation, CMHRP, Coastal and Marine Hazards and Resources Program, Coyote Creek, All tags... Digital Elevation Model (DEM) 1 meter, Dumbarton Bridge, PCMSC, Pacific Coastal and Marine Science Center, San Francisco Bay, San Mateo Bridge, U.S. Geological Survey, USGS, digital elevation models, elevation, geographic information systems, geospatial datasets, multibeam echo sounder, single-beam echo sounder, Fewer tags Fluctuating Asymmetry in Waterbirds in Relation to Mercury Exposure The dataset includes the bird species, sex, mercury concentration in breast feathers and whole blood, and the composite measure of fluctuating asymmetry. Statistical models were developed for each species to analyze the relationship between mercury exposure in either breast feathers or whole blood and the composite measure of fluctuating asymmetry, while accounting for the sex of each bird. Categories: Data; Tags: California, Ecology, Environmental Health, Exposure, Fluctuating asymmetry, All tags... Mercury, Mercury toxicity, San Francisco Bay, USGS Science Data Catalog (SDC), Wildlife Biology, Fewer tags Mercury speciation and other constituent data from deep sediment cores in Alviso Slough, South San Francisco Bay, California, 2012-16 This dataset includes mercury and other constituent concentration and physical properties data for seven deep sediment profiles (ranging from 79 cm to 214 cm in length) collected from the thalwag of Alviso Slough, a major tributary to South San Francisco Bay (California, USA). Field sampling occurred during May 2012 (4 sites) and January 2016 (3 sites). Each profile was comprised of 1–4 core sub-sections, which were collected from adjacent boreholes with 10–18 cm of vertical overlap. This data product includes two data tables (*.csv): 1) ‘T1_ALSL_DC_Sed_Data.csv’, the deep core analytical results; 2) ‘T2_ALSL_DC_QA_Data.csv’, quality assurance data. The two image files, ‘ALSL_DC_Log_2012.pdf’ and ‘ALSL-DC_Log_2016.pdf’,... Categories: Data; Types: ArcGIS REST Map Service, ArcGIS Service Definition, Downloadable, Map Service; Tags: Alviso Slough, San Francisco Bay, South Bay Salt Ponds, USGS Science Data Catalog (SDC), biogeochemistry, All tags... environment, geoscientificInformation, mercury, sediment cores, slough, slough, wetland restoration, Fewer tags Modeled surface waves from winds in South San Francisco Bay A model application using the phase-averaged wave model SWAN (in Delft3D) was developed to simulate wind waves in South San Francisco Bay, California, between 30 May 2021 and 19 May 2022. This data release describes the development of the model application, provides input files, and includes output from the model simulations in netCDF format. Model Application The model application included two domains (Fig. 1) that were 1-way coupled. The coarse overall model domain (wsfb_g1.grd) included the coastal ocean across the entire San Francisco Sacramento/San Joaquin Bay-Delta region was forced along the oceanic boundaries with measured time-varying, spatially uniform wave parameters derived from the Coastal Data Information... Categories: Data; Tags: CMHRP, Coastal and Marine Hazards and Resources Program, Geomorphology, PCMSC, Pacific Coastal and Marine Science Center, All tags... San Francisco Bay, State of California, Surface Wind Wave, U.S. Geological Survey, USGS, Water Column Features, bay, ocean waves, oceans, physical oceanography, waves, Fewer tags Sediment Deposition and Accretion Data from a Tidal Salt Marsh in South San Francisco Bay, California 2021-2022 The U.S. Geological Survey, Western Ecological Research Center collected sediment and accretion data at a wave-exposed tidal salt marsh in South San Francisco Bay, California. Sediment traps and feldspar marker horizons (MH) were deployed along transects of increasing distance from the sediment source, at primary, secondary and tertiary marsh channels/bay. Data were collected bi-monthly over two month periods in summer 2021 and winter 2021/2022. Included here are trap and MH plot locations, calculated sediment fluxes at each station by deployment period, annual accretion rates, and covariates associated with sediment deposition and accretion including vegetation structure and elevation. This project aimed to assess... Categories: Data; Tags: Ecology, Eden Landing Ecological Reserve, High Salt Marsh, Land Use Change, San Francisco Bay, All tags... Sedimentology, USGS Science Data Catalog (SDC), accretion, biota, blue carbon, carbon, sea-level change, sediment transport, surface deposition, wetland ecosystems, Fewer tags Bathymetric change of Central San Francisco Bay, California: 1971 to 2020 This 25-m-resolution surface presents bathymetric change of Central San Francisco Bay, California (hereafter referred to as Central Bay). This surface compares a 1-m-resolution digital elevation model (DEM) of the central portion of San Francisco Bay (Fregoso and others, 2021), comprised of bathymetry data in the Central Bay region from the time period referred to as the 2010s because the majority of the surveys were in that decade, to a 25-m-resolution DEM of Central Bay comprised of historic surveys from 1971 to 1984 (referred to as the 1980s because the majority of the surveys were in that decade). The creation of this change surface involved the resampling of the 1-m-resolution 2010s DEM to match the 25-m-resolution... Categories: Data; Tags: Bathymetry and Elevation, Central Bay, GPS measurement, Global Positioning System (GPS) observations, San Francisco Bay, All tags... bathymetry, coastal processes, digital elevation models, elevation, geographic information systems, geographic information systems (GIS), geospatial datasets, inlandWaters, multibeam echo sounder, multibeam sonar, single-beam echo sounder, single-beam echo sounder, topographic mapping, topography, Fewer tags Census counts of diatoms from core 721-1 obtained in 2002 off San Francisquito Creek in South San Francisco Bay This data release provides census counts of diatoms in sediments of a core obtained off San Francisquito Creek in South San Francisco Bay. Categories: Data; Tags: CMHRP, Coastal and Marine Hazards and Resources Program, Habitat, Hooks Point, Invertebrates, All tags... PCMSC, Pacific Coastal and Marine Science Center, San Francisco Bay, San Francisquito Creek, Substrate, U.S. Geological Survey, USGS, bay, biota, diatoms, environment, geoscientificInformation, gravity coring, organisms, protists, sediment deposition, society, Fewer tags San Francisco Bay-Delta bathymetric/topographic digital elevation model (DEM) A high-resolution (10-meter per pixel) digital elevation model (DEM) was created for the Sacramento-San Joaquin Delta using both bathymetry and topography data relative to current modern datum of North American Vertical Datum of 1988 (NAVD88). This DEM is the result of collaborative efforts of the U.S. Geological Survey (USGS) and the California Department of Water Resources (DWR). The base of the DEM is from a 10-m DEM released in 2004 and updated in 2005 (Foxgrover and others, 2005) that used Environmental Systems Research Institute (ESRI), ArcGIS Topo to Raster module to interpolate grids from single beam bathymetric surveys collected by DWR, the Army Corp of Engineers (COE), the National Oceanic and Atmospheric... Categories: Data; Types: Citation, Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: American River, Bathymetry and Elevation, Echo Sounders, Fremont Weir, GPS (Global Positioning System), All tags... Geophysics, Global Positioning System (GPS) observations, Knights Landing, LIDAR, Liberty Island, Mildred Island, Nimbus Dam, Sacramento, Sacramento River, Sacramento River Deep Water Ship Channel, Sacramento-San Joaquin Delta, San Francisco Bay, San Francisco Bay Delta, San Joaquin River, Suisun Bay, Tracy, Water Depth, Yolo By-Pass, bathymetry, digital elevation models, elevation, geographic information systems, geospatial datasets, single-beam echo sounder, topographic mapping, topography, Fewer tags Gravity cores from San Pablo Bay and Carquinez Strait, San Francisco Bay, California This data release contains information on gravity cores that were collected by the U.S. Geological Survey in the area of San Pablo Bay and Carquinez Strait, California in 1990, 1991, and 2000. Ten (10) pdf files describe gravity cores that were split, photographed, and imaged by X-rays, and another pdf file contains a core-log legend. In addition, a shapefile provides sample collection data. Seventy-two gravity cores were collected by the U.S. Geological Survey in 1990, 1991, and 2000 from San Pablo Bay and Carquinez Strait, California. Gravity cores from San Pablo Bay contain bioturbated laminated silts and sandy clays, whole and broken bivalve shells (mostly mussels), fossil tube structures, and fine plant or... Categories: Data; Types: Citation, Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: California, Carquinez Strait, Marine Geology, Oceans > marine sediments > sedimentation, San Francisco Bay, All tags... San Pablo Bay, USA, environment, geoscientificInformation, gravity coring, oceans, stratigraphy, Fewer tags Tidal marsh biomass field plot and remote sensing datasets for six regions in the conterminous United States (ver. 2.0, June 2020) Remote sensing based maps of tidal marshes, both of their extents and carbon stocks, have the potential to play a key role in conducting greenhouse gas inventories and implementing climate mitigation policies. Our objective was to generate a single remote sensing model of tidal marsh aboveground biomass and carbon that represents nationally diverse tidal marshes within the conterminous United States (CONUS). To meet this objective we developed the first national-scale dataset of aboveground tidal marsh biomass, species composition, and aboveground plant carbon content (%C) from six CONUS regions: Cape Cod, MA, Chesapeake Bay, MD, Everglades, FL, Mississippi Delta, LA, San Francisco Bay, CA, and Puget Sound, WA.... Categories: Data, Data Release - Revised; Tags: C-band synthetic aperture radar, Cape Cod, Carbon sequestration, Chesapeake Bay, Everglades National Park, All tags... National greenhouse gas inventory, Puget Sound, San Francisco Bay, St Mary Parish, Terrebonne Parish, USGS Science Data Catalog (SDC), aboveground carbon stocks, multispectral imagery, plant functional type, tidal marsh biomass, wetlands, Fewer tags Sediment Biogeochemistry and Mercury Measurements from Wetlands of the San Francisco Bay, CA. Habitat biogeochemistry was assessed by measuring 31 variables in sediments, porewater, and surface waters related to mercury content, organic matter, sediment characteristics, and microbial rates of sulfate reduction, iron reduction, and methanogenesis. Fifty-six composite surface (0-2 cm) sediment cores and 32 surface water samples were collected in three wetlands in the spring and summer of 2005 and 2006. Categories: Data; Tags: Arachnids, Birds, Crustaceans, Insects, San Francisco Bay, All tags... bioaccumulation, biota, coastal ecosystems, ecotoxicology, food web, wetland ecosystems, Fewer tags « 1 2 3 4 »