This data release provides 210Pb and 137Cs measurements in sediments of a core obtained off San Francisquito Creek in South San Francisco Bay.

This data release provides radiocarbon measurements from a core obtained off San Francisquito Creek in South San Francisco Bay.

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.

This data release provides the measurement of anthropogenic metals and other elements in sediments of a core obtained off San Francisquito Creek in South San Francisco Bay.

This data release provides the measurement of anthropogenic metals and other elements in sediments of a core obtained off San Francisquito Creek in South San Francisco Bay.

Corte Madera Marsh, located in northern San Francisco Bay, California, is experiencing shoreline erosion. Determining whether the eroded sediment is exported to the bay or imported via tidal channels and deposited on the marsh platform is critical to understanding the long-term response of the marsh to wave attack and sea-level rise. Quantifying water-column sediment flux helps to characterize the role of tidal channels in this process, and water discharge is a key component of sediment flux. Tidal creek discharge was measured repeatedly over diurnal tidal cycles in a tidal channel located in the central, Muzzi marsh region of Corte Madera marsh, California during the summer of 2022 and during the winter of 2023. These transect data were collected using a downward-looking Teledyne RDI RiverPro 1200-kilohertz acoustic Doppler current profiler (ADCP) from a moving boat.

Corte Madera Marsh, located in northern San Francisco Bay, California, is experiencing shoreline erosion. Determining whether the eroded sediment is exported to the bay or imported via tidal channels and deposited on the marsh platform is critical to understanding the long-term response of the marsh to wave attack and sea-level rise. Quantifying water-column sediment flux helps to characterize the role of tidal channels in this process, and water discharge is a key component of sediment flux. Tidal creek discharge was measured repeatedly over diurnal tidal cycles in a tidal channel located in the central, Muzzi marsh region of Corte Madera marsh, California during the summer of 2022 and during the winter of 2023. These transect data were collected using a downward-looking Teledyne RDI RiverPro 1200-kilohertz acoustic Doppler current profiler (ADCP) from a moving boat.

In situ images of the sediment-water interface and sediment profiles were collected to characterize the top layer of the sediment bed (less than 15 cm sediment depth) prior to dredged material placement and post dredge material placement in south San Francisco Bay, California. Several sites within the placement area, as well as sites outside of the placement area, and near time-series stations were collected. The photos were acquired during four separate trips: August 2023 (pre-placement), October 2023 (pre-placement), January 2023 (post-placement), and February (greater than 1 year post-placement). The sediment profile imaging system consisted of a Blackfly S Board-level BFS-GE-50S5C0BD2 camera that incorporates a Sony IMX264 sensor and has an m12-mount type wide-angle 4.4 mm lens. The resulting field of view was approximately 7x15 cm at the window, with a resolution of 0.0667 mm per pixel when the vertically (portrait) oriented window of the housing was pushed into the sediment bed. The camera was secured horizontally in Sediment Profile Imaging (SPI) camera waterproof housing from OceanInstruments, which was lowered to the bay floor at the different stations and pushed from above into the sediment bed using a rigidly attached pole. The images captured using the system show a profile view which includes a surface view of the sediment bed where the window was above the water-sediment interface, and/or a high-resolution sediment profile where the window extended vertically down into the sediment bed and was flush with the sediment. The maximum depth below the water-sediment interface recorded by the sediment profile imaging camera was approximately 15 cm.

Topographic data were collected in the Corte Madera Marsh, San Pablo National Wildlife Refuge Marsh, and at the time-series stations in the shallows adjacent to each marsh in Northern San Francisco Bay between April 2022 and September 2023. The topographic data were acquired using global satellite navigation system receivers that were either mounted on backpacks and hiked over the marsh surface or mounted on a survey rod held shipside against a deployed platform or on the water surface. Sometimes an additional staff was used in conjunction with the shipside survey rod to reach the platform, which we refer to as an integrated collection method.

Topographic data were collected in the Corte Madera Marsh, San Pablo National Wildlife Refuge Marsh, and at the time-series stations in the shallows adjacent to each marsh in Northern San Francisco Bay between April 2022 and September 2023. The topographic data were acquired using global satellite navigation system receivers that were either mounted on backpacks and hiked over the marsh surface or mounted on a survey rod held shipside against a deployed platform or on the water surface. Sometimes an additional staff was used in conjunction with the shipside survey rod to reach the platform, which we refer to as an integrated collection method.