Field Activity 2021-627-FA

Identifier 2021-627-FA
Alternate names WTS21
Purpose Collect data to determine sediment delivery to Whale's Tail marsh and its variation with tidal and wave conditions.
Location Eden Landing Ecological Reserve, Alameda County, CA, USA
Summary Water samples were collected and analyzed for suspended sediment concentrations, sediment grabs were collected and analyzed for bulk density and grain size. Tidal creek discharge was measured. Additionally, hydrodynamic data including current velocities, pressure, temperature, salinity, were collected at various locations near the marsh edge and tidal creeks.
Info derived suspended sediment concentration in Bay shallows, marsh creeks, and over marsh, waves and currents in shallows, bed sediment grain size and bulk density
Comments Entries for this field activity are based on entries from Field Activity 2021-624-FA
R/V Jewell
2018 Pacific Boats, Length: 23 ft, Beam: 8.6 ft, Draft: 1 meter
on foot
survey conducted on foot
MarFac; crewcab - G63-2147R
Mitsubishi Outlander G61-0912R
Start Union City, CA 2021-06-04
End Union City, CA 2021-08-20
Days in the field 12
West -122.15045929
East -122.1295166
North 37.60824808
South 37.57941251
Marine operations Yes


2885 Mission Street
Santa Cruz, CA95060
(831) 460-7401
Principal investigators Jessica R Lacy
Crew members
Joanne C. T Ferreira
Scientist, Staff
Jackson E Currie
Scientist, Staff
Jessica R Lacy
Scientist, Staff
Timothy C Elfers
Scientist, Staff
Joshua Logan
Scientist, Staff
Cordell Johnson
Scientist, Staff
Daniel J Nowacki
Scientist, Staff
Daniel C Powers
Scientist, Staff
Rachel K Marcuson
Scientist, Staff
McKee, Jennifer
Scientist, Staff
McGill, Samantha
Scientist, Staff
Winkler Prins, Lukas
Scientist, Staff
Information specialist(s)
McGill, Samantha
Specialist, Information
Affiliate principal Thorne, Karen (USGS WERC)

Data types and categories

Data category: Time Series, Sampling, Location-Elevation, Environmental Data
Data type: Mooring (physical oceanography), Geology, Benchmarks, Turbidity, Temperature, Conductivity

Equipment used

Equipment Usage description Data types Datasets
Moorings - Tripods Mooring (physical oceanography) 1
Push corer Surveys (geochemical), Surveys (biological), Biology, Geology 1
Gomex Core Geology (no data reported)
OBS Sediment Properties, Turbidity, Biology, Chemistry, Geology (no data reported)
watersamples Conductivity, CTD, Dissolved Oxygen, Fluorescence, Nitrate, pH, Temperature, Turbidity, Wave 2
Trimble R10 Benchmarks, LIDAR, Navigation, Profiles, Transects (no data reported)


Datasets compiled from multiple sources

Dataset name Equipment Description Dataset contact
Hydrodynamic time-series data from Whale's Tail South marsh in Eden Landing Ecological Reserve in Alameda County, CA in 2021 and 2022 Moorings - Tripods Hydrodynamic and sediment transport time-series data, including water depth, velocity, turbidity, conductivity, and temperature, were collected by the U.S. Geological Survey (USGS) Pacific Coastal and Marine Science Center in South San Francisco Bay and in the Whale's Tail South marsh in Eden Landing Ecological Reserve in Alameda County, CA in 2021 and 2022. Data files are grouped by data type and season (summer and winter). At Bay sites, instruments were deployed on small quadpods. In the tidal creek, instruments were attached to grates mounted directly on the sediment bed. Marsh sites consisted of one transect of six stations perpendicular to the bay-marsh interface, and a second transect perpendicular to a tidal creek. Note that marsh stations were positioned fairly high in the tidal frame (close to the mean higher-high water elevation), so they were inundated less than 10 percent of the time. Instruments at the Bay stations were inundated most of the time but were subaerial at low tide. Data are only valid when the instruments were submerged. Users are advised to assess data quality carefully, and to check metadata for instrument information, as platform deployment times and data-processing methods varied. Joanne C. T Ferreira
Grain size, bulk density, and carbon content of sediment collected from Whales Tail South marsh and adjacent bay floor, South San Francisco Bay, California, 2021-2022 Push corer Sediment samples were collected on and adjacent to the Whale's Tail South marsh. Short push-cores of bed sediment were collected in South San Francisco Bay adjacent to Whale's Tail South marsh on five days from June through August 2021 and 3 days from November 2021 to January 2022. Additional samples were taken from sediment deposited on ceramic tiles attached to the marsh surface and from rip-up clasts deposited on the marsh edge. Samples were analyzed for sediment properties including bulk density, particle size distribution, and percent carbon. Joanne C. T Ferreira
Profiles of salinity, temperature, depth, turbidity, and distributions of particle size in suspension collected during four days in South San Francisco Bay, California, June 2021 to January 2022 watersamples Profiles of salinity, temperature, turbidity, and particle size distribution were collected by the U.S. Geological Survey (USGS) Pacific Coastal and Marine Science Center in South San Francisco Bay. Data were collected at depth intervals ranging between 0.5 and 2 m (depending on total water depth), sensors remained at each depth for 1-2 minutes. Each profile was collected from surface to bed, and the near-surface region was sampled again at the end of the profile to check steady-state conditions. Profiles were collected on 4 days: June 22, July 21, and December 3 of 2021, and on January 4, 2022 (UTC). Data files are grouped by season (summer or winter) and by instrument (CTD or LISST). No LISST data were collected in the winter. Users are advised to assess data quality carefully. Joanne C. T Ferreira
Percent sand and fines in suspended sediment from water samples from South San Francisco Bay, California, 2021 watersamples Water samples were collected in South San Francisco Bay adjacent to Whale's Tail South marsh on three days from June through December 2021 to analyze for suspended-sediment concentration and the percent of sand and fines in suspended sediment. Samantha C McGill


Samples collected during this field activity