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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

 


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