Lake Basin Characteristics and Morphometry
9
Complete the calculations and questions following Option 2.
OPTION 2. LABORATORY EXERCISE
1
'15.5
'15.0
'12.5
·9.0
1. From the field data give in Table 1.1, construct a map of the shore line of the exemplary lake.
Label completely.
2. From the data given in Fig. 1.4, interpolate points of uniform depth at 2- or 5-m intervals.
Draw in bathymetric contour lines.
3. Complete the following calculations and questions.
Morphometric Calculations
Maximum Length (L). The maximum distance on the lake surface between any two points on
the shore line. This length is potentially the maximum fetch or effective length for wind to act on
the surface of the lake without land interruption.
Maximum Width or Breadth (b). The maximum distance between the shores perpendicular
to the line of maximum length. The mean width (b) is equal to the surface area (Ao) divided by the
'2.0 '1.5
·10.0
-7.5 '5.0
'14.0 '10.2
'16.3 '15.0
·16.5
'17.0
'17.5 '17.5 '16.7
'14.8
'16.5
·17.9
'19.0 ·20.1'18.6 '17.6
'15.5
.17.7 .17.1
'16.8
'14.5
·13.6
'12.8 '10.9'15.3 '16.7
'4.8
'13.0
4.9·
'16.7
·16.2 ·15.9
'17.0
'12.0
-n' 7.7- ~ -8.'
·15.5
·15.3
'21.5
'10.5
10.0'
'14.5 '16.3 '16.3
·23.5
'22.6 '21.4
'8.6 9.5'
'3.6
7.0·
'19.7
'24.3
'23.5
'18.5
4.0'
'3.8
'12.0
'4.5
·20.5
'24.8
'24.4 ·21.1 '17.0
'4.7 '7.3 '10.0 ·13.2
N
'3.8
'14.6
'24.4
'22.8
'11.6
·1.0
'6.9
'4.0
·22.1
'18.0 ·17.0 ·8.7
'2.0
'13.2
'7.8
HYPO LAKE
'7.9 '11.3 '6.5
·3.8
o
100
200
300
METERS
Figure 1.4. Depth soundings (in meters) in exemplary Hypo Lake from which depth contours and morphometric calculations can be made.