Data

The U.S. Geological Survey Pacific Coastal and Marine Science Center collected oceanographic and hydrographic monitoring data for a pilot project to place dredged sediment in bay shallows to nourish marshes conducted by the US Army Corps of Engineers, San Francisco District. Dredged material was placed in the shallows of South San Francisco Bay during December 2023. Monitoring spanned...

This data release provides tidally corrected shoreline positions for five groin field sites of around the United States (Ventura, CA, Newport Beach, CA , Santa Monica, CA, Long Branch, NJ, Sandwich, MA). Both CSV files of tidally corrected shorelines and GeoJSON files of the region of interests (ROIs), transects, and reference shorelines are provided within respective zip files. Both...

Along-shore surface-based 2D electrical resistivity tomography (ERT) surveys were collected in the nearshore region of Ofu, American Samoa.

In-situ nearshore seawater measurements of dissolved radon and water level were used to determine the advection rate of groundwater onto the fringing reef off Ofu, American Samoa.

The sediment core data presented here were compiled for use in a project studying the amount of sand either released from or stored within the bed sediments of San Francisco Bay, California from the 1980s to 2010s. Estimates of the change in sand storage in the bed sediments could be used in larger San Francisco Bay sand budget and transports studies as well as to inform management...

Geochemical analysis of coastal springs and possible source waters were conducted in the National Park Service's National Park of American Samoa (NPS-NPSA) Ofu Island unit. Water samples were analyzed for dissolved nutrients, nitrate isotopes (delta-18-O and delta-15-N). Algae samples were collected and analyzed for delta-15-N and delta-13-C values.

Charcoal counts and soil, water, and reservoir sediment-core geochemistry were characterized eight months after the November 2021 Muckamuck Fire in the North Fork Salmon Creek basin and Conconully Reservoir, Washington, the receiving water body. Parameters include sand-sized charcoal, Cesium-137, excess Lead-210, aqueous and solid-phase elemental chemistry, and polycyclic aromatic...

This data release contains nearshore bathymetry measurements collected at Point Barrow, Alaska in July 2022. These data were collected as part of an effort to monitor and forecast coastal flooding and erosion. They are also intended for reuse by scientists, managers, and the general public.

This data release consists of a series of seamless topobathymetric digital elevation models (TBDEMs) for coastal Alaskan communities. Each TBDEM was assembled from best available, multi-source topographic and bathymetric elevation data collected at the time of processing. These products were created to support the development of dynamic flood models, but are also intended for reuse by...

These field data such as first floor elevation and bathymetric surveys were collected to support development of coastal mapping products and advance storm response and recovery in Alaskan coastal communities. The data consists of essential community infrastructure elevation data to better understand flood exposure and support analysis of flood mitigation solutions, bathymetric surveys to...

Marine sediment push cores and one mineral concretion were collected near waste barrels in the San Pedro Basin of the Southern California Borderland in the Pacific Ocean using a remotely operated vehicle during the Schmidt Ocean Institute research cruise FK210726 onboard the R/V Falkor in 2021. Dried sediment samples of the 0-2 centimeter horizon of the cores and the mineral concretion...

This data release provides radiochemistry data (210Pb and 137Cs) of two sediment cores, BC01 and BC02, collected during USGS Field Activity 2024-662-FA in 2024 in San Francisco Bay, California, U.S.A., off Alameda and Point Isabel, respectively.