User’s manual for the National Water Information System of the U.S. Geological Survey: Water-Quality System

Dupré, David H.; Scott, James H.; Clark, Melanie L.; Canova, Michael G.; Stoker, Yvonne E.

doi:10.3133/ofr20131054

Cited by 2 publications

(2 citation statements)

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“…Occasionally, samples had more than one value per water‐quality parameter. For NWIS Cl − and pH data, we selected a single value using parameter codes based on the established hierarchy for selecting values for ion balance calculations within NWIS [ Dupré et al ., ]. There were not specific criteria for SC, so we only used total values from NWIS and selected values determined in the lab over field measurements.…”

Section: Methodsmentioning

confidence: 99%

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Assessment of surface water chloride and conductivity trends in areas of unconventional oil and gas development-Why existing national data sets cannot tell us what we would like to know

et al. 2015

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Heightened concern regarding the potential effects of unconventional oil and gas development on regional water quality has emerged, but the few studies on this topic are limited in geographic scope. Here we evaluate the potential utility of national and publicly available water-quality data sets for addressing questions regarding unconventional oil and gas development. We used existing U.S. Geological Survey and U.S. Environmental Protection Agency data sets to increase understanding of the spatial distribution of unconventional oil and gas development in the U.S. and broadly assess surface water quality trends in these areas. Based on sample size limitations, we were able to estimate trends in specific conductance (SC) and chloride (Cl 2 ) from 1970 to 2010 in 16% (n 5 155) of the watersheds with unconventional oil and gas resources. We assessed these trends relative to spatiotemporal distributions of hydraulically fractured wells. Results from this limited analysis suggest no consistent and widespread trends in surface water quality for SC and Cl 2 in areas with increasing unconventional oil and gas development and highlight limitations of existing national databases for addressing questions regarding unconventional oil and gas development and water quality.

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Section: Methodsmentioning

confidence: 99%

“…Since STORET data do not have parameter codes, we selected a single value based on the preference for analysis fraction (filtered/dissolved or unfiltered/total) in the ion balance calculations outlined in Dupré et al . []. For Cl − , dissolved values were selected over total values.…”

Section: Methodsmentioning

confidence: 99%

Assessment of surface water chloride and conductivity trends in areas of unconventional oil and gas development-Why existing national data sets cannot tell us what we would like to know

et al. 2015

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Sampling and analysis plan for the Koocanusa Reservoir and upper Kootenai River, Montana, water-quality monitoring program, 2021

Eldridge¹,

Schaar²,

Reese³

et al. 2023

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In 2021, the U.S. Geological Survey will collect waterquality samples and environmental data from 3 sites in Koocanusa Reservoir and from 1 site in the Kootenai River. The transboundary Koocanusa Reservoir is in southeastern British Columbia, Canada, and northwestern Montana, United States, and was formed with the construction of Libby Dam on the Kootenai River 26 kilometers upstream from Libby, Montana. Two of the reservoir sites and the Kootenai River site, in the Libby Dam tailwater (the outflow of the reservoir flow into the Kootenai River), are equipped with automated, high-frequency ServoSipper water samplers. At the two reservoir sites, these samplers are mounted to pontoon platforms and automatically collect samples from multiple depths; a ServoSipper sampler was deployed at one site in 2019, and another ServoSipper sampler will be deployed at a second site in 2021. Discrete water-quality samples will be collected monthly at two depths at the river site and at two of the reservoir sites. The goal of this project is to collect multidepth, high-frequency vertical and temporal water-quality samples and data to understand the limnological and biological processes that control variations and trends in selenium concentrations and loads throughout Koocanusa Reservoir and in the Libby Dam tailwater at the southern end of the reservoir. This sampling and analysis plan documents the organization, sampling and data-collection scheme and design, pre-and post-collection processes, and quality-assurance and qualitycontrol procedures.

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User’s manual for the National Water Information System of the U.S. Geological Survey: Water-Quality System

Cited by 2 publications

References 1 publication

Assessment of surface water chloride and conductivity trends in areas of unconventional oil and gas development-Why existing national data sets cannot tell us what we would like to know

Assessment of surface water chloride and conductivity trends in areas of unconventional oil and gas development-Why existing national data sets cannot tell us what we would like to know

Sampling and analysis plan for the Koocanusa Reservoir and upper Kootenai River, Montana, water-quality monitoring program, 2021

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