Low flow water quality data for the Animas River, Arrastra Creek to Silverton, Colorado, September 2021

Dates

Start Date: 2021-09-20
End Date: 2021-09-21
Publication Date: 2024-10-22

Citation

Runkel, R.L., Blake, J.M., Walton-Day, K., Buss, L.A., Dyment, S., Krueger, K., Kurzweil, J., and Bonwell, C., 2024, Low flow water quality data for the Animas River, Arrastra Creek to Silverton, Colorado, September 2021: U.S. Geological Survey data release, https://doi.org/10.5066/P13VQ5RC.

Summary

A synoptic sampling campaign was conducted on the Animas River near Silverton, Colorado, under low-flow conditions in September 2021. The sampling campaign was designed to quantify constituent loading and identify sources of contamination along a 3.8-kilometer study reach. The study reach began approximately 170 meters upstream of Arrastra Creek and extended downstream to U.S. Geological Survey gage 09358000 within the city of Silverton, Colorado. A continuous, instream injection of a sodium bromide tracer was initiated at the head of the study reach three days prior to the start of the sampling campaign and maintained until the completion of main stem sampling. Bromide concentrations were subsequently used to determine streamflow [...]

Summary

A synoptic sampling campaign was conducted on the Animas River near Silverton, Colorado, under low-flow conditions in September 2021. The sampling campaign was designed to quantify constituent loading and identify sources of contamination along a 3.8-kilometer study reach. The study reach began approximately 170 meters upstream of Arrastra Creek and extended downstream to U.S. Geological Survey gage 09358000 within the city of Silverton, Colorado. A continuous, instream injection of a sodium bromide tracer was initiated at the head of the study reach three days prior to the start of the sampling campaign and maintained until the completion of main stem sampling. Bromide concentrations were subsequently used to determine streamflow using the tracer-dilution method. Water quality samples were collected at 23 sites along the Animas River main stem, and 28 inflow sites including springs, seeps, small tributaries, and ponded water. Main stem sites were sampled using three sampling approaches. Under the first approach, a subset of 8 main stem sites were sampled "simultaneously" (in less than 20 minutes) to assess the effects of diel variation in constituent concentration. Under the second approach, all main stem sites were sampled with the sampling team working in the downstream-to-upstream direction, a protocol typically used during synoptic sampling. A subset of 5 main stem sites were also sampled using a Equal Discharge Increment approach that was designed to indicate which side of the stream was responsible for the observed constituent loads. This data release includes field parameters (temperature, pH, and specific conductivity), concentration data (inorganic cations and anions), estimated streamflow, and calculated loads for the sampling campaign. Calculated loads may be used to identify and rank sources of contamination to the Animas River. The data release consists of a kmz file showing site locations and the following 3 tables: Table 1, Locations of sampling sites; Table 2, Synoptic sampling results, September 20-21, 2021; Table 3, Spatial profiles of streamflow and constituent load.

Contacts

Point of Contact :: Robert L Runkel, U.S. Geological Survey, ROCKY MOUNTAIN REGION
Originator :: Robert L Runkel, Johanna M Blake, Katie Walton-Day, Lothian A Buss, Stephen Dyment, Kathryn Krueger, Jake Kurzweil, Carly Bonwell
Metadata Contact :: Robert L Runkel, U.S. Geological Survey, ROCKY MOUNTAIN REGION
Publisher :: U.S. Geological Survey, U.S. Geological Survey
Distributor :: U.S. Geological Survey - ScienceBase
USGS Mission Area :: Ecosystems
SDC Data Owner :: Colorado Water Science Center

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Animas_Synoptic_FGDC_Metadata.xml Original FGDC Metadata	View	91.81 KB	application/fgdc+xml
cover_photo.jpg		612.62 KB	image/jpeg
table1_sites.csv		4.53 KB	text/csv
table2_synoptic_results.csv		24.96 KB	text/csv
table3_streamflow_and_loads.csv		6.54 KB	text/csv
site_locations.kmz		2.96 KB	application/vnd.google-earth.kmz

Purpose

These data were collected by the U.S. Geological Survey (USGS) in cooperation with U.S. Environmental Protection Agency. Additional support was provided by the USGS Environmental Health Program of the Ecosystem Mission Area. These data are used to quantify constituent loads in the Animas River near Silverton, Colorado.

Low flow water quality data for the Animas River, Arrastra Creek to Silverton, Colorado, September 2021

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