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Likely controls on dissolved reactive phosphorus concentrations in baseflow of an agricultural stream.

May 2020

Publication: Journal of Soils and Sediments
Author(s): R. McDowell, C. Depree, R. Stenger

High baseflow phosphorus (P) concentrations increase the likelihood of periphyton blooms. Several physical and chemical factors can control baseflow P concentrations such as hydraulic exchange with groundwater, particle size-sorting, redox chemistry and different sediment sources. We hypothesized that of these sources, anoxic sediments would allow P-rich groundwater to influence baseflow P concentrations the most and that the measurement of the equilibrium P concentration (EPC0) of sediments under oxic conditions would not predict P release in anaerobic sediment or baseflow P concentrations.

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