TABLE VIII 
VERTICAL THERMAL GRADIENTS 
CONTINENTAL CLIMATE CLASS 
LEGEND: T = Surface water temperature as determined from Tables 
LN: 
HN: 
I through VIII 
Ty Water temperature at designated depths 
Gh n= number of observations 
1 d; Si 
Tidal range less than 10 feet; fresh water influence absent. 
Tidal range equal to or greater than 10 feet; fresh water influence 
absent. 
LR: Tidal range less than 10 feet; fresh water influence present, 
HR: Tidal range equal to or greater than 10 feet; fresh water influence 
present. 
WINTER (coldest month) 
Surface 
10 feet 0.0 } 0.3 0.0 | 0.3 |}0.0 | 0.0 
20 feet 0.0 | 0.4 0.0 | 0.5 |{]0.0 | 0.0 
30 feet 0.0 | 0.5 0.0 | 0.7 |/0.0 | 0.0 
50 feet 0.0 | 0.6 0.0 | 0.8 }|/0.0 | 0.1 
70 feet 0.1 | 0.9 O.1 | 1.0 |/ 0.1 | 0.1 
100 feet O52 1150 0.1 | 1.3 }70.1 | 0.1 
150 feet O55: elt O.1 | 1.7 |{[/ 0.1 | 0.1 
180 feet 0.4 | 1.3 O.1 | 1.9 |} 0.1 | 0.1 
All values of € and o are °F, 
28 
