50
Exercise 4
Table 4.2. Temperature profiles and other physical characteristics in Mirror Lake, New
Hampshire.
Jan. 25 1970
Feb. 21 1970
May 17 1970
June 24 1970
Depth (m)
Temp. CC)
Temp. CC)
Temp. (uC)
Temp. CC)
0
- 7.7 (ice surface) - 4.7 (ice surface)
15.45
21.80
0.51
0
0.62
0
1
3.82
3.35
15.45
21.35
2
3.91
4.15
\3.58
20.74
3
3.98
4.15
12.15
20.41
4
4.00
4.18
9.73
16.53
5
4.00
4.20
8.46
12.38
6
4.05
4.25
7.06
10.27
7
4.13
4.38
6.20
8.69
8
4.49
4.54
6.06
7.38
9
4.63
4.70
5.45
6.52
10
5.00
5.00
5.62
6.48
10.9 (mud surface)
5.05
5.25
5.75
6.50
Ice thickness (cm)
51
62
Snow depth (cm)
0
8
Water level
Depression below ice
surface (em)
4.2
5.0
Air temperature CC)
-7.7
-4.7
12.1
22.2
Table 4.3. Hydrographic data for Mirror Lake, New Hampshire.
43° 56.5' N, 71 ° 41.5' W
Elevation
213m
Average depth
5.75m
Maximum effective length 610m
Length of shore line 2,247m
Maximum effective width
370m
Shore development
1.64
Area
15.0ha
Volume development 1.57
Maximum depth
11.0m
Relative depth
2.5%
Volume
Depth (m)
Area (m 2 x 10 4 )
% of total
Stratum (m)
(m 3 x 10 3 )
(% of total)
0
15.0
100.0
0-1
142.9
16.6
13.6
90.5
1-2
130.0
15.1
2
12.4
82.9
2-3
119.5
13.9
3
11.5
76.5
3-4
110.0
12.8
4
10.5
70.1
4-5
101.8
11.8
5
9.86
65.7
5-6
94.1
10.9
6
8.96
59.7
6-7
78.5
9.1
7
6.79
45.2
7-8
48.9
5.7
8
3.21
21.4
8-9
23.6
2.7
9
1.61
10.7
9-10
10.7
1.2
10
0.609
4.06
10-11
2.0
0.2
11
0
0
Total 862.0
100.0