as provided in the Mandaville
Database (Mandaville, 2000). Data are presumed valid
as of ~1991.
Approximate Location: *(d m s) 44o 48' 47” N 63 o 44' 17” W
*(d m.m) 44o 48.78' N 63 o 44.28' W
*(d.d) 44.813 o N 63.738 o W
*d=degree; m=minute; s=second
|
|
Value |
units |
|
|
Maximum length (metres) |
1,832 |
m |
= 1.8 km |
|
Maximum width ( metres) |
853 |
m |
= 0.9 km |
|
Maximum depth ( metres) |
4.6 |
m |
|
|
Average width ( metres) |
431 |
m |
= 0.4 km |
|
Shoreline length (lake perimeter;
metres) |
5,600 |
m |
= 5.6 km |
|
Average depth ( metres) |
3.2 |
m |
|
|
Approx. elevation above sea level (metres) |
103 |
m |
|
|
Surface area (hectares) |
90 |
ha |
|
|
Watershed area (hectares) |
498 |
ha |
|
|
Volume (cubic metres) |
2,560,000 |
m3 |
|
|
Basin permanence Index |
0.46 |
m3 km-1 |
|
|
Approximate flushing rate (volume
per year) |
2.1 |
y-1 |
~170 litre s-1 |
|
Relative depth (per cent) |
0.43 |
% |
|
|
Shoreline development Index |
1.70 |
- |
|
|
Volume development Index |
2.1 |
- |
|
|
In-lake total phosphorus
retention Index |
0.7 |
- |
|
Notes on the measures (morphometrics) of a
lake:
Maximum length, L (Wetzel & Likens 1991) is the maximum distance (m) on the lake surface between any two points on the shore line. This length is potentially the maximum fetch (effective length for wind to act on the surface of the lake without land interruption).
Maximum width, b (Wetzel & Likens 1991) is the maximum distance (m) between the shores perpendicular to the line of maximum length L (m).
Maximum depth, Zmax is the depth Z (m) of the deepest point in the lake.
Surface area, Ao
is the area (m2 or hectares) of the
surface of the lake excluding islands.
Shoreline length or lake perimeter, SL is the length (m) of the shoreline of the lake.
Average width ba (Wetzel & Likens 1991) is equal to the surface area Ao (m2) divided by the maximum length L (m):
Volume, V is the volume (m3) of water in the lake
Average Depth, 
is
the volume V (m3) of the lake divided by the lake surface
area Ao (m2):
Relative Depth, Zr (Hutchinson 1957, and Wetzel & Likens 1991) is the maximum depth Zmax as a percentage of the mean diameter of the lake calculated according to:
.
For most lakes, Zr < 2%. For some deep lakes, with small surface areas, Zr > 4% and these lakes tend to exhibit greater stability (not as easily mixed by the wind) than those with low Zr.
Shore Line Development, DL (
The closer this ratio is to 1, the more circular the lake. A large ratio (>>1) indicates the shoreline is more crenulated and reflects the potential for development of littoral communities (plants) and usually of high biological productivity.
Development of Volume, DV (Hutchinson 1957) is a measure of departure of the shape of the
lake basin from that of a cone calculated using the maximum depth Zmax and the average depth:
For the majority of lakes, DV >1 (i.e. a conical depression). DV is greatest in shallow lakes with flat bottoms.
Index of Basin Permanence, IBP (Kerekes 1977) is a index provided by the ratio of the lake volume V (x106 m3) divided by the shoreline length SL (km) and indicates the littoral effect on basin volume. For example, where IBP < 0.1, the lake is most likely dominated by rooted aquatic plants, there are indicators of senescence (excessive shallowness, high water color and high total phosphorus loading. For comparison, Lake Baikal has IBP ≈ 10,000; Lake Superior ≈ 4,000; Lake Erie IBP ≈ 450.
References:
Hutchinson, G.E. 1957. A Treatise on Limnology. Vol-1. Geography, Physics and Chemistry. John Wiley & Sons. 1015p.
Kerekes, J. 1977.
The index of lake basin permanence. Int. Revue ges.
Hydrobiol. 62(2):291 293.
Mandaville, S. 2000. Limnology in
Nova Scotia: lake data and predictive phosphorus models: archives in electronic
format. 1st Edition [
Wetzel, R.G., and G.E. Likens. 1991. Limnological Analyses. 2nd. Ed. Springer-Verlag. 391p.