2022 Early Hearing Detection & Intervention Virtual Conference
March 13 - 15, 2022
5/20/2019 | 2:00 PM - 2:15 PM | A QUICK TOUR THROUGH THE NATION’S FINE-SCALE NITRATE DYNAMICS; QUANTIFYING NUTRIENT VARIABILITY OVER THE COURSE OF 24 HOURS | 150 DEF
A QUICK TOUR THROUGH THE NATION’S FINE-SCALE NITRATE DYNAMICS; QUANTIFYING NUTRIENT VARIABILITY OVER THE COURSE OF 24 HOURS
The amount of nitrate in streams is important for ecological and human water use, and variability in this metric can range in timescales from hours to decades. Though seasonal and year-to-year dynamics have been well studied, sub-daily dynamics are poorly understood, yet are immediately important to human and other biological water users. With the growing number of high-frequency nitrate data sets, we are now able to look at how variability over the course of a day may compare to weekly, monthly, and seasonal variability. This study looks at >100 high-frequency nitrate data sets and aims to quantify and describe the within-day variation of these constituents over a range of geographic locations, flow conditions, and seasonality. We synthesize these data using multiple forms of analysis to characterize different nutrient ‘regimes’ seen in the nations’ waters. Preliminary analysis has shown that the within-day variation of nitrate across streams is considerable, with an average concentration range of 0.2 mg/L and maximums of over 20 mg/L. Given that the median nitrate concentration across these days is ~2 mg/L, this can represent a variation of 10% or more.
- Nutrients
- Temporal
- Network
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Presenters/Authors
Catherine Chamberlin
(), Duke University, catherine.chamberlin@duke.edu;
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Jim Heffernan
(), Duke University, james.heffernan@duke.edu;
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