Transport and Fate of Nitrogen in a Glacial Outwash Aquifer-Stream System: Upland Processes

Nutrients National Synthesis Project

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 ]

Table 5. Biogeochemical reactions determined from the NETPATH modeling process. Reaction coefficients represent the amount in mmol L^-1 of phases entering (positive values) or leaving (negative values) solution.

Phases	Models
Phases	1	2	3	4
CH₂O	1510	1510	1510	1510
CaCO₃	357	259	759	†
CaMg(CO₃)₂	201	250	†	379
N₂	-350	-350	-350	-350
CaSO₄·2H₂O	23	23	23	23
KCl	88	88	88	88
Ca/K Exchange	†	-49	201	-179
Mg/K Exchange	-49	†	-250	130
Ca+Mg/Na Exchange	-17	-17	-17	-17

†Phase not included in the model