2022 Early Hearing Detection & Intervention Virtual Conference
March 13 - 15, 2022
6/05/2017 | 3:00 PM - 3:15 PM | An Evaluation of Continuous Monitoring Data for Assessing Dissolved-Oxygen in the Boston Mountains, Arkansas | 301B
An Evaluation of Continuous Monitoring Data for Assessing Dissolved-Oxygen in the Boston Mountains, Arkansas
Continuous water-quality monitoring data can be more useful for assessing the degree of variability over space and time than data collected periodically at discrete points in time. We assessed continuous dissolved-oxygen (DO) data at five USGS monitoring sites to evaluate assessment methodology that Arkansas applies to Boston Mountains streams with watersheds >10 mi2 (i.e. streams are listed as impaired when more than 10% of the measurements are < 6 mg/L). We evaluated data for periods of record available when stream temperatures exceeded 22o C, which Arkansas considers to be the “critical season”, from 2013 to 2015.
The current assessment methodology for the Boston Mountains is effective at identifying streams with various degrees of impairment. The two sites designated as least disturbed by nutrient and land use indices exceeded the DO standard for <4% of unit values (measurements), while the three sites that were moderately and most disturbed exceeded the 6 mg/L standard for 20 to 33% of unit values. Our analysis also demonstrated the importance of other constituents such as pH and specific conductance for indicating the degree that photosynthetic processes and groundwater interactions influence DO concentrations.
- C36 Water Resource Management
- C27 Landuse and Non-Point source Impacts
- C36 Water Resource Management
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Presenters/Authors
Billy Justus
(), USGS, Little Rock, AR, bjustus@usgs.gov;
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Jessie Green
(), Arkansas Department of Environmental Quality, greenj@adeq.state.ar.us;
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Nathan Wentz
(), Arkansas Dept of Environmental Quality, wentz@adeq.state.ar.us;
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Lucas Driver
(), USGS, Lower Mississippi-Gulf Water Science Center, ldriver@usgs.gov;
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