Field Activity 2019-615-FA

Identifier 2019-615-FA
Purpose To improve the scientific basis for shallow water habitat restoration to support fisheries in the San Francisco Bay Delta, in collaboration with scientists from the CA Water Science Center.
Location San Francisco Bay Delta, Little Holland Tract, California
Summary Sediment cores were collected at two locations in Liberty Island and two stations in Little Holland Tract.
Info derived Grain size and bulk density of bed sediments.
Comments Entries for this field activity are based on entries from Field Activity 2018-644-FA Entries for this field activity are based on entries from Field Activity 2018-673-FA Entries for this field activity are based on entries from Field Activity 2018-687-FA
R/V Jewell
2018 Pacific Boats, Length: 23 ft, Beam: 8.6 ft, Draft: 1 meter
MarFac; crewcab - G63-2147R
Start Rio Vista, CA 2019-03-27
End Rio Vista, CA 2019-03-27
Days in the field 1
West -121.729
East -121.63231728
North 38.34440275
South 38.22842333


2885 Mission Street
Santa Cruz, CA95060
(831) 460-7401
Principal investigators Jessica R Lacy
Crew members
Peter Dal Ferro
Scientist, Staff
Dailey, Evan
Scientist, Staff
Information specialist(s)
Dailey, Evan
Specialist, Information

Data types and categories

Data category: Location-Elevation, Sampling
Data type: Navigation, Geology

Equipment used

Equipment Usage description Data types Datasets
Push corer Surveys (geochemical), Surveys (biological), Biology, Geology 1
Garmin Navigation (no data reported)


Datasets compiled from multiple sources

Dataset name Equipment Description Dataset contact
Grain size and bulk density from Little Holland Tract and Liberty Island, Sacramento-San Joaquin Delta, California, 2015 to 2019 (ver. 3.0, April 2023) Push corer Grain size distribution and bulk density are reported for sediment samples from two flooded agricultural tracts, Little Holland Tract and Liberty Island, in the Sacramento-San Joaquin Delta, California. Samples were repeatedly collected at 8 sites using a Ponar grab or push core samplers during 19 visits to the study area from 2015 to 2019. The long-term time series data collection stations (sites LWA, HVB, HWC, and LVB) were sampled on almost every field survey, and the remaining sites were sampled 6 or times or fewer, some only once. All samples were analyzed for grain size distribution, and some were analyzed for bulk density. These data provide insight into how particle size distributions varied spatially and temporally. Jessica R Lacy


Samples collected during this field activity