Transport and Fate of Nitrate in Glacial Outwash Aquifer

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Transport and Fate of Nitrate in a Glacial Outwash Aquifer in Relation to Ground-Water Age, Land Use Practices and Redox Processes

By Larry J. Puckett and Timothy K. Cowdery

[Journal of Environmental Quality, vol. 31, no. 3, p. 782-796 ]

Figure 6. Argon and nitrogen gas concentrations for samples collected during 1994, 1995, and 1997 and their theoretical values. Values to the right of the air-saturated water equilibrium line represent excess nitrogen concentrations. Horizontal tick marks on the equilibrium line indicate Ar and N₂ equilibrium concentrations from 0 degrees to 20 degrees C in 2-degree increments.

Argon and nitrogen gas concentrations for samples
collected during 1994, 1995, and 1997 and their theoretical values. Values
to the right of the air-saturated water equilibrium line represent excess nitrogen
concentrations. Horizontal tick marks on the equilibrium line indicate Ar and
N<sub>2</sub> equilibrium concentrations from 0 degrees to 20 degrees C in 2-degree
increments.

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