Open-File Report 99-219 contents page
| Table 12. Seasonal (April through October) median values for submersed aquatic vegetation habitat criteria parameters at freshwater tidal Potomac River monitoring station XEA1840 for the period 1983 through 1997 | |||||
|
YEAR
|
SECCHI (m)
|
TSS
(mg/l) |
CHLA
(mg/l) |
DIP
(mg/l) |
DIN
(mg/l) |
|
1983
|
0.66
|
16.0
|
3.96
|
0.0400
|
1.4210
|
|
1984
|
0.67
|
21.0
|
32.72
|
0.0200
|
0.8440
|
|
1985
|
0.61
|
15.0
|
19.11
|
0.0400
|
0.8908
|
|
1986
|
0.50
|
17.8
|
10.73
|
0.0405
|
1.0150
|
|
1987
|
0.80
|
11.0
|
6.06
|
0.0303
|
1.4200
|
|
1988
|
0.90
|
13.0
|
4.26
|
0.0305
|
1.4560
|
|
1989
|
0.80
|
11.0
|
3.81
|
0.0290
|
1.9410
|
|
1990
|
0.60
|
17.8
|
3.19
|
0.0320
|
1.7450
|
|
1991
|
1.00
|
8.0
|
4.26
|
0.0240
|
1.4820
|
|
1992
|
0.70
|
15.0
|
2.49
|
0.0365
|
1.6470
|
|
1993
|
0.70
|
14.5
|
3.64
|
0.0333
|
1.1235
|
|
1994
|
0.60
|
17.8
|
9.78
|
0.0295
|
1.1710
|
|
1995
|
0.65
|
20.0
|
14.32
|
0.0280
|
0.9438
|
|
1996
|
0.45
|
27.8
|
12.75
|
0.0173
|
1.4240
|
|
1997
|
0.45
|
23.0
|
25.40
|
0.0200
|
0.6940
|
| Table 13. Seasonal (April through October) median values for submersed aquatic vegetation habitat criteria parameters at oligohaline Potomac Estuary monitoring station XDA4238 for the period 1983 through 1997 | |||||
|
YEAR
|
SECCHI (m)
|
TSS
(mg/l) |
CHLA
(mg/l) |
DIP
(mg/l) |
DIN
(mg/l) |
|
1983
|
0.82
|
11.0
|
3.69
|
0.0500
|
1.2300
|
|
1984
|
0.66
|
16.0
|
20.69
|
0.0600
|
0.7580
|
|
1985
|
0.49
|
19.5
|
6.36
|
0.0600
|
0.8240
|
|
1986
|
0.55
|
18.5
|
3.84
|
0.0680
|
0.8530
|
|
1987
|
0.70
|
15.0
|
3.14
|
0.0475
|
1.1980
|
|
1988
|
0.60
|
13.0
|
4.34
|
0.0540
|
0.8700
|
|
1989
|
0.60
|
12.0
|
2.99
|
0.0450
|
1.8480
|
|
1990
|
0.40
|
21.0
|
3.42
|
0.0500
|
1.5040
|
|
1991
|
0.80
|
11.5
|
7.10
|
0.0260
|
0.6460
|
|
1992
|
0.55
|
16.0
|
4.17
|
0.0440
|
1.3100
|
|
1993
|
0.60
|
20.5
|
3.46
|
0.0380
|
0.7200
|
|
1994
|
0.45
|
25.0
|
4.86
|
0.0465
|
0.9550
|
|
1995
|
0.63
|
19.5
|
6.48
|
0.0340
|
0.9335
|
|
1996
|
0.40
|
28.0
|
8.22
|
0.0235
|
1.3705
|
|
1997
|
0.45
|
26.0
|
13.50
|
0.0270
|
0.5865
|
Table
14 & 15
Table
10 & 11
Open-File
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