69 
Table VI-1 . Some physical characteristics of the Mattaponi and Pamunkey tidal fresh (MPNTF and TMKTF, 
respectively) and oligohaline (MPNOH and PMKOH, respectively) segments: depth distribution 
based on depth of cells in the Chesapeake Bay Program volumetric interpolator, acres of fringing 
tidal wetlands, segment perimeter, segment water surface area, segment water column volume 
and segment water surface area:water column volume ratio. 
Maximum 
CBP Depth 
Segment (meters) 
75th 
Percentile 
(meters) 
Median 
Depth 
(meters) 
25th 
Percentile 
(meters) 
Minimum 
Depth 
(meters) 
Wetland 
Acreage 
(acres) 
Segment 
Perimeter 
(meters) 
Segment 
Surface Area 
(meters 2 ) 
Segment 
Volume 
(meters 3 ) 
Surface Area 
to Volume 
Ratio 
MPNTF 
12 
3 
2 
1 
1 
1,125 
108,327 
8,573,187 
15,337,500 
0.6 
MPNOH 
15 
5 
3 
2 
1 
3,360 
109,059 
8,660,891 
35,390,000 
0.2 
PMKTF 
15 
4 
2 
1 
1 
1,652 
264,699 
16,229,024 
28,630,000 
0.6 
PMKOH 
18 
5 
3 
2 
1 
5,374 
119,417 
14,093,807 
66,680,000 
0.2 
Source: Chesapeake Bay Program http://ww\ 
v.chesapeakebay.net/data 
Table VI-2. Recent summer averaged water quality conditions in the Mattaponi and Pamunkey tidal fresh 
(MPNTF and PMKTF, respectively) and oligohaline (MPNOH and PMKOH, respectively) segments for 
2000-2002, dry to record dry summers. 
CBP 
Segment 
Water 
Water Column 
Column Depth 
Layer (meters) 
Salinity 
(PPO 
Temperature 
(°C) 
Dissolved 
Oxygen 
Concentration 
(mg liter 1 ) 
Dissolved 
Oxygen 
Deficit 
(mg liter' 1 ) 
Chlorophyll a 
Concentration 
(ug liter 1 ) 
Total 
Suspended 
Solids 
Concentration 
(mg liter 1 ) 
Total Total 
Nitrogen Phosphorus 
Concentration Concentration 
(mg liter 1 ) (mg liter 1 ) 
MPNTF 
S 0.7 
0.0 
27.3 
5.6 
2.4 
5.9 
10.3 
0.61 
0.079 
MPNTF 
B 3.0 
0.0 
27.2 
5.6 
2.4 
• 
12.3 
0.61 
0.080 
MPNOH 
S 0.7 
7.4 
26.8 
5.6 
2.1 
10.6 
35.4 
0.76 
0.115 
MPNOH 
B 14.3 
8.4 
26.5 
5.0 
2.7 
100.6 
0.94 
0.174 
PMKTF 
S 0.7 
0.3 
26.9 
5.3 
2.5 
6.2 
18.3 
0.61 
0.084 
PMKTF 
B 6.1 
0.3 
26.8 
5.5 
2.6 
31.0 
0.68 
0.107 
PMKOH 
S 0.7 
6.6 
26.2 
5.0 
2.9 
12.6 
46.0 
0.73 
0.105 
PMKOH 
B 5.2 
7.0 
26.2 
4.9 
3.0 
139.9 
1.11 
0.220 
S = surface 
B = bottom 
Source: Chesapeake Bay Water Quality Monitoring Program database, http: www.chesapeakebay.net data 
chapter vi 
Guidance for Deriving Site Specific Dissolved Oxygen Criteria 
