1. Coastal and Marine Hazards and Resources
  2. Geoscience Data System

Field Activity 2025-615-FA

Identifier 2025-615-FA
Purpose Collect nearshore bathymetric and topographic profiles, collect grab samples for characterization of benthic communities
Location Coastal waters off Humboldt Bay
Summary Bathymetry data and beach topography data collected and archived on FAD.
Info derived bathymetry, topography, benthic community composition
Projects
Platform
Parke Snavely
34'
Waverunner 1 (SC)
Personal Water Craft
Waverunner 2 (SC)
Personal Water Craft
Vehicles
MarFac; Chevy Suburban - gray; 7 pass; G62-2874L
MarFac; Ford F350 MT use only; pickup - white; G43-2784H
MarFac; Ford F350 pickup/stake truck; 6 pass; G82-0317H
Itinerary
Start Eureka, CA 2025-04-14
End Eureka, CA 2025-05-02
Days in the field 5
Bounds
West -124.43801899
East -124.05212503
North 40.95189883
South 40.58371632
Marine operations Yes

Personnel

Organization
2885 Mission Street
Santa Cruz, CA95060
(831) 460-7401
Principal investigators Andrew Stevens
Crew members
Jackson E Currie
Scientist, Staff
Timothy C Elfers
Scientist, Staff
Daniel C Powers
Scientist, Staff
Parker, Kai
Scientist, Staff
Information specialist(s)
Andrew Stevens
Specialist, Information
Affiliate principal Susan De La Cruz

Data types and categories

Data category: Biological Field Study, Sonar, Location-Elevation
Data type: Surveys (biological), Single Beam, Benchmarks, Profiles

Equipment used

Equipment Usage description Data types Datasets
sample Surveys (biological) (no data reported)
Cee HydroSystems Ceescope Single Beam 1
Radio (base) Benchmarks, LIDAR, Navigation, Profiles, Transects (no data reported)
Base - Trimble Transects, Profiles, Benchmarks, Navigation 1
RTK GPS LIDAR, Transects, Benchmarks, Profiles, Navigation 1
Trimble R10 Benchmarks, LIDAR, Navigation, Profiles, Transects 1

Datasets

Datasets compiled from multiple sources

Dataset name Equipment Description Dataset contact
Nearshore bathymetry of Humboldt Bay North Spit and South Spit, California Cee HydroSystems Ceescope Bathymetric data of the nearshore zone were collected along Humboldt Bay North and South Spits, California using personal watercraft (PWCs) equipped with single-beam sonar systems and global navigation satellite system (GNSS) receivers. This data release currently contains bathymetric data from 2 surveys performed between April 2025 and September 2025 and will be updated when additional surveys become available. Andrew Stevens
Beach topography of Humboldt Bay North Spit and South Spit, California Base - Trimble Topographic data were collected along the beaches and dunes of Humboldt Bay North Spit and South Spit, California using global navigation satellite system (GNSS) receivers mounted to backpacks. Additional topographic data were collected between transects in some areas with an all-terrain vehicles equipped with GNSS receivers. This data release currently contains topographic data from 2 surveys performed between April 2025 and September 2025 and will be updated when additional surveys become available. Andrew Stevens
Beach topography of Humboldt Bay North Spit and South Spit, California RTK GPS Topographic data were collected along the beaches and dunes of Humboldt Bay North Spit and South Spit, California using global navigation satellite system (GNSS) receivers mounted to backpacks. Additional topographic data were collected between transects in some areas with an all-terrain vehicles equipped with GNSS receivers. This data release currently contains topographic data from 2 surveys performed between April 2025 and September 2025 and will be updated when additional surveys become available. Andrew Stevens
Nearshore bathymetry of Humboldt Bay North Spit and South Spit, California Trimble R10 Bathymetric data of the nearshore zone were collected along Humboldt Bay North and South Spits, California using personal watercraft (PWCs) equipped with single-beam sonar systems and global navigation satellite system (GNSS) receivers. This data release currently contains bathymetric data from 2 surveys performed between April 2025 and September 2025 and will be updated when additional surveys become available. Andrew Stevens

Publications

Samples collected during this field activity