Field Activity 2018-623-FA

Identifier 2018-623-FA
Also known as NapaSonoma
Purpose Characterize sediment from wildfire-burned areas in Napa and Sonoma watersheds.
Location Napa and Sonoma watersheds, California
Summary Collected 20 hand-grab samples from Sonoma Creek and Napa River, and 1 petit ponar grab sample from Napa River.
Info derived Sediment geochemical composition and contaminants
Comments Ecosystems Priority Ecosystems Mini-Project
on foot
walking survey, generally with GPS backpack
Start Sonoma, CA 2018-03-17
End Napa, CA 2018-03-17
Days in the field 1
West -122.58609966
East -122.21406326
North 38.43372646
South 38.08952574


2885 Mission Street
Santa Cruz, CA95060
(831) 460-7401
Principal investigators Renee K Takesue
Crew members
Information specialist(s)
Renee K Takesue
Specialist, Information
Affiliate principal Brett Tipple (UCSC)

Data types and categories

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

Equipment used

Equipment Usage description Data types Datasets
Handheld GPS Navigation (no data reported)
Hand-grab sample Biology, Chemistry, Geology 2


Datasets compiled from multiple sources

Dataset name Equipment Description Dataset contact
Parent and alkylated polycyclic aromatic hydrocarbons (PAHs) and per- and polyfluoroalkyl substances (PFAS) in north San Francisco Bay, Napa River, and Sonoma Creek in 2018 and 2019 Hand-grab sample Sediment grain-size distributions, stable carbon isotope ratios (d13C), total carbon to total nitrogen ratios (C:N), short-lived radionuclides (Beryllium-7, Cesium-137, and Lead-210), concentrations of 76 parent and alkylated polycyclic aromatic hydrocarbons (PAHs) and concentrations of 33 per- and polyfluoroalkyl substances (PFAS) were measured in the northern reach of San Francisco Bay (San Pablo and Suisun Bays), and in stream beds of the lower reaches of Napa River and Sonoma Creek, 5 months and 20 months after the 2017 Atlas and Nuns wildfires. New sites for sediment geochemistry analyses added 20 months post-fire included the lower reaches of Petaluma Creek and Suisun Slough, and in marsh sediment on Napa River and Sonoma Creek. Renee K Takesue
Geochemistry of sediment and organic matter in drainages burned by the Altas and Nuns wildfires in October 2017 and of nearshore seabed sediment in north San Francisco Bay from March to April 2018 Hand-grab sample Fine-grained sediment was collected from the banks of Napa River, Sonoma Creek, and tributaries in March 2018 and from shallow nearshore areas of the northern reach of San Francisco Bay in April 2018. Bulk sediment was dated using activities of short-lived cosmogenic radionuclides (beryllium-7, cesium-137, and lead-210). Contents of potentially toxic metals and source-rock-indicative elements, including rare earth elements, were quantified in the fine fraction of sediment (particles less than 0.063 mm diameter). Ratios of stable carbon-13/carbon-12 isotopes and total carbon to total nitrogen were determined in sedimentary organic matter. Renee K Takesue


Samples collected during this field activity