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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 ]

Table 3. Median concentrations of S2-, dissolved gases, NO3-, excess N2  (Xs N2), reconstructed NO3- (SNO3-), and CFC-based apparent ages of samples collected during 1994, 1995, and 1997. [All concentrations are mmol L-1 and ages are in years. NO3- concentrations may differ from Table 4 because only samples having paired N2 gas data were included in the calculations.]

 

Site

S2-

O2

CO2

CH4

Ar

N2

Xs N2

NO3-

SNO3-

CFC Apparent Age

OF1S

0

11.5

788.6

0.1

17.2

746.3

97.7

1071.4

1266.8

8-11

OF1A

0

37.5

545.5

0.0

16.7

880.0

249.0

628.6

1126.5

22

OF1B

0

10.0

521.9

0.0

17.6

928.2

265.4

610.7

1141.4

24-25

OF1C

0.78

2.3

600.8

15.5

18.2

957.3

274.6

0

549.2

46-47

OF1D

0.84

4.9

621.6

214.7

18.6

859.8

162.2

0

324.4

>50

OF2D

0.5

6.3

493.2

2.2

18.1

982.1

302.3

0

604.6

OF3S

0

145.3

250.0

0

18.7

747.9

48.9

564.3

662.2

5-8

OF3M

0

0

634.6

0.3

15.1

967.4

394.4

4.3

793.15

37

OF3D

0.9

0

570.0

25.1

16.8

980.2

345.9

5.1

696.9

47-48

OF5S

0

181.3

1045.5

0

20.3

813.2

88.4

95.7

272.4

5-8

no data available


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