Shallow Sediment Geochemical Data for the Cache Creek Settling Basin, Yolo County, California, 2010–17

Dates

Publication Date: 2018-10-16
Start Date: 2010
End Date: 2017

Citation

Marvin-DiPasquale, M.C., Alpers, C.N., Windham-Myers, L, Fleck, J.A., Agee, J.L., Kieu, L.H., Kakouros, E., Arias, M., Orlando, J., Bennett, P.A., Stumpner, E., Kinnard, K.D., Ward, A.J., and Rose, S.L., 2018, Shallow Sediment Geochemistry in a Mercury-Contaminated Multi-Habitat Floodplain: Cache Creek Settling Basin, Yolo County, California, 2010–17: U.S. Geological Survey data release, https://doi.org/10.5066/F7W094TH.

Summary

This dataset includes shallow surface sediment (top 0–2 cm interval) constituent concentration data (primarily) and microbial methylmercury production potential rate data (limited) collected from the Cache Creek Settling Basin (CCSB), Yolo County, California, between April 2010 and July 2017. The dataset includes up to 706 observations (including field replicates) per sediment parameter, reflecting 93 unique sampling locations, with each location having been sampled from 1 to 28 times (excluding field replicates) over this 8-year period. There were four spatially intensive field campaigns conducted (February–March 2013, May 2013, October–November 2014, and January–March 2015), during which at least 90 sites were sampled. A sub-set [...]

Summary

This dataset includes shallow surface sediment (top 0–2 cm interval) constituent concentration data (primarily) and microbial methylmercury production potential rate data (limited) collected from the Cache Creek Settling Basin (CCSB), Yolo County, California, between April 2010 and July 2017. The dataset includes up to 706 observations (including field replicates) per sediment parameter, reflecting 93 unique sampling locations, with each location having been sampled from 1 to 28 times (excluding field replicates) over this 8-year period. There were four spatially intensive field campaigns conducted (February–March 2013, May 2013, October–November 2014, and January–March 2015), during which at least 90 sites were sampled. A sub-set of 13 sites were sampled intensively (20–28 times, primarily during 2015–2017) to create a more detailed monthly time-series at these locations. Sampling was conducted over a range of hydrologic conditions, from periods when the basin was essentially dry (no overlying water, even in ‘open-water’ habitats) to periods when the basin was nearly fully flooded (most sites with overlying water). This data release includes six data tables given both as Excel (*.xlxs) and machine readable 'comma-separated values' format (*.csv): 1) ‘CCSB.SED_data.dictionary’, the Data Dictionary, which provides definitions and details related to the other five data tables and includes citations of analytical methods; 2) ‘CCSB.SED_2010-17’, the primary dataset with spatial/temporal sediment and pore water analyses; 3) ‘CCSB.SED_seq’, a sub-set of sediment samples (33 sites collected during May 2013) assayed for Hg using a 5-fraction sequential extraction procedure; 4) ‘CCSB.SED_grain.size’, data on detailed sediment grain-size distribution (by laser-scattering Coulter counter) for 615 unique samples (plus n=65 field duplicates); 5) ‘CCSB.SED_size.frac’, a sub-set of sediment samples (33 sites collected during May 2013) size-fractioned into 5 size classes and assayed for total mercury and limited suite of parameters, including particulate surface area (at 15 of the 33 sites); and 6) ‘CCSB.SED_QA’, quality assurance data summary. The mapping of the physical site locations can be found on the companion child page associated with this product (‘see Associated Items’).

Contacts

Point of Contact :: Mark C. Marvin-DiPasquale
Originator :: Mark C. Marvin-DiPasquale, Charles N. Alpers, Lisamarie Windham-Myers, Jacob A. Fleck, Jennifer L.Agee, Le H. Kieu, Evangelos Kakouros, Michelle Arias, James Orlando, Peter A. Bennett, Elizabeth Stumpner, Kevin D. Kinnard*, Alfred J. Ward, Shanna L. Rose
Metadata Contact :: Jennifer L. Agee
Publisher :: U.S. Geological Survey
Distributor :: U.S. Geological Survey - ScienceBase

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Metadata_Record_Shallow Sediment Geochemical Data for the Cache Creek Settling Basin, Yolo County, California, 2010_17.xml Original FGDC Metadata	View	13.95 KB	application/fgdc+xml
T1_CCSB. data.dictionary.csv		159.78 KB	text/csv
T1_CCSB. data.dictionary.xlsx		38.13 KB	application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
T2_CCSB.SED_2010-17.csv		209.8 KB	text/csv
T2_CCSB.SED_2010-17.xlsx		198.34 KB	application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
T3_CCSB.SED_seq.extr.csv		8.32 KB	text/csv
T3_CCSB.SED_seq.extr.xlsx		15.83 KB	application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
T4_CCSB.SED_grain.size.csv		1.11 MB	text/csv
T4_CCSB.SED_grain.size.xlsx		808.66 KB	application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
T5_CCSB.SED_size.frac.csv		39.29 KB	text/csv
T5_CCSB.SED_size.frac.xlsx		32.86 KB	application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
T6_CCSB.SED_QA.csv		7.4 KB	text/csv
T6_CCSB.SED_QA.xlsx		21.06 KB	application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
Child_Data.JPG		4.11 MB	image/jpeg

Purpose

This dataset was collected to improve understanding of the spatial (by habitat type) and temporal (seasonal and interannual) dynamics of mercury biogeochemistry within the shallow sediment zone of the CCSB, and by extension in similar habitat types common throughout the California Central Valley and elsewhere. The data inform state agencies (including the California Dept. of Water Resources, which funded the study) and other stakeholders regarding the factors that control mercury speciation and methylmercury formation within the CCSB and similar locales where the production, mobility, and bioaccumulation of methylmercury are of particular concern.

Shallow Sediment Geochemical Data for the Cache Creek Settling Basin, Yolo County, California, 2010–17

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