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Using Chemical, Hydrologic, and Age Dating Analysis to Delineate Redox Processes and Flow Paths in the Riparian Zone of a Glacial Outwash Aquifer-Stream System
By Larry J. Puckett, Timothy K. Cowdery, Peter B. McMahon, Lan H. Tornes, and Jeffrey D. Stoner
[Water Resources Research, vol. 38, no. 8, August 2002]Table 4. Median concentrations of S2-, dissolved gases, NO3-, excess N2 (Xs N2), reconstructed NO3- (SNO3-), and CFC apparent ages of samples collected between 1994 and 1997. [All concentrations are mmol L-1 and ages are in years. NO3- concentrations may differ from Table 3 because only samples having paired N2 gas data were included in the calculations. Values reported as “0” were less than the detection limit.]
|
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 |
60.3 |
1071.4 |
1192.0 |
8 |
|
OF1A |
0 |
37.5 |
545.5 |
0 |
16.7 |
880.0 |
215.2 |
628.6 |
1059.0 |
22 |
|
OF1B |
0 |
10.0 |
521.9 |
0 |
17.6 |
928.2 |
217.0 |
610.7 |
991.0 |
24 |
|
OF1C |
0.78 |
2.3 |
600.8 |
15.5 |
18.2 |
957.3 |
243.5 |
0 |
487.0 |
46 |
|
OF1D |
0.84 |
4.9 |
621.6 |
214.7 |
18.6 |
859.8 |
114.7 |
0 |
229.4 |
50 |
|
A1 |
0 |
87.5 |
690.9 |
0 |
17.2 |
712.6 |
29.5 |
1000.0 |
1059.0 |
8 |
|
A2 |
0 |
12.1 |
518.2 |
0 |
16.9 |
903.9 |
232.5 |
528.6 |
993.6 |
24 |
|
A2” |
0 |
10.4 |
629.0 |
0.3 |
16.3 |
858.3 |
211.3 |
42.9 |
465.5 |
30 |
|
A3 |
0 |
2.6 |
865.1 |
11.6 |
16.3 |
803.8 |
155.6 |
0 |
311.2 |
28 |
|
A4 |
1.84 |
1.7 |
801.0 |
23.2 |
16.7 |
738.4 |
32.4 |
0 |
64.8 |
45 |
|
A5 |
1.00 |
2.2 |
1416.5 |
1010.8 |
10.1 |
340.2 |
-- |
0 |
-- |
-- |
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U.S. Department of the Interior |
U.S. Geological Survey
URL: http://water.usgs.gov/nawqa/nutrients/pubs/wrr_v38/table4.html
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