Open-File Report 99-219 contents
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| Table 4. Seasonal (April through October) median values for submersed aquatic vegetation habitat criteria parameters in freshwater tidal Potomac River segment UTR for the period 1983 through 1997 | ||||
|
YEAR
|
SECCHI (m)
|
TSS
(mg/l) |
CHLA
(mg/l) |
DIP
(mg/l) |
|
1983
|
0.66
|
12.5
|
5.56
|
0.0300
|
|
1984
|
0.76
|
10.0
|
8.26
|
0.0200
|
|
1985
|
0.91
|
14.5
|
7.98
|
0.0400
|
|
1986
|
0.60
|
15.0
|
7.35
|
0.0200
|
|
1987
|
0.70
|
14.0
|
8.37
|
0.0300
|
|
1988
|
0.60
|
19.0
|
7.03
|
0.0220
|
|
1989
|
0.50
|
15.5
|
6.88
|
0.0380
|
|
1990
|
0.60
|
18.0
|
8.52
|
0.0320
|
|
1991
|
0.70
|
15.5
|
8.97
|
0.0160
|
|
1992
|
0.60
|
18.0
|
7.85
|
0.0230
|
|
1993
|
0.60
|
19.5
|
12.71
|
0.0130
|
|
1994
|
0.60
|
17.0
|
18.44
|
0.0205
|
|
1995
|
0.70
|
20.0
|
19.94
|
0.0160
|
|
1996
|
0.60
|
23.0
|
8.65
|
0.0215
|
|
1997
|
0.60
|
20.5
|
20.50
|
0.0125
|
| Table 5. Seasonal (April through October) median values for submersed aquatic vegetation habitat criteria parameters in freshwater tidal Potomac River segment LTR for the period 1983 through 1997 | ||||
|
YEAR
|
SECCHI (m)
|
TSS
(mg/l) |
CHLA
(mg/l) |
DIP
(mg/l) |
|
1983
|
0.61
|
18.0
|
9.68
|
0.0400
|
|
1984
|
0.67
|
18.0
|
25.66
|
0.0200
|
|
1985
|
0.61
|
15.0
|
24.44
|
0.0375
|
|
1986
|
0.50
|
17.5
|
12.79
|
0.0320
|
|
1987
|
0.75
|
14.0
|
7.73
|
0.0290
|
|
1988
|
0.75
|
15.7
|
6.48
|
0.0290
|
|
1989
|
0.80
|
11.5
|
5.21
|
0.0250
|
|
1990
|
0.60
|
17.0
|
4.38
|
0.0300
|
|
1991
|
0.80
|
9.0
|
4.80
|
0.0185
|
|
1992
|
0.70
|
15.0
|
3.99
|
0.0300
|
|
1993
|
0.70
|
15.5
|
4.98
|
0.0255
|
|
1994
|
0.60
|
19.3
|
12.96
|
0.0255
|
|
1995
|
0.60
|
22.0
|
17.57
|
0.0233
|
|
1996
|
0.50
|
27.5
|
11.04
|
0.0185
|
|
1997
|
0.45
|
26.3
|
25.08
|
0.0148
|
Table
6 & 7
Table
2 & 3
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