344 
BATHYMETRICAL SURVEY OF 
Loch Galavie (see Plate LXXXII.). — Loch Calavie (or Calvie) lies 
about 6 miles to the north-west of Loch Lungard, and only 7 miles from 
the head of Loch Carron on the west coast of Scotland, at a high 
elevation among the mountains, the lower slopes of which are covered 
with peat. The loch trends in a north-west and south-easterly direction, 
and is considerably over a mile in length, with a maximum width 
towards the western end exceeding one-third of a mile, whence the 
breadth gradually decreases on approaching the eastern end. The 
superficial area is about 167 acres, or a quarter of a square mile, and 
the area draining into it nearly square miles. The maximum depth 
of 84 feet was observed in a central position, but rather nearer the 
western than the eastern end. The volume of water is estimated 
at 276 million cubic feet, and the mean depth at 38 feet. The loch 
was surveyed on October 19, 1904, when the elevation was found by 
levelling from bench-mark to be 1128-35 feet above the sea — a little 
lower than the elevation as determined by the Ordnance Survey officers 
on August 14, 1866, viz. 1128*5 feet above sea-level. 
Loch Calavie is perfectly simple in conformation, the contour-lines 
coinciding approximately with the shore-line, though in each case they 
approach nearer to the western than to the eastern end of the loch, so 
that the average slope is steeper towards the head of the loch. This 
is shown in the longitudinal section A-B on the map. The 25-feet 
basin is nearly a mile, and the 50-feet basin three-quarters of a mile, 
in length. The soundings give no indication of any steep offshore 
slopes, and the average slope between the 25-feet and 50-feet contours 
is less steep than in shallower water, as indicated in the following 
table by the larger area beyond the 25-feet line: — 
0 to 25 feet 
55 acres 
33 per cent. 
25 „ 50 „ 
62 „ 
37 „ 
50 ,, 75 ,, 
39 ,, 
24 „ 
Over 75 ,, 
11 „ 
6 „ 
167 ,, 
100 
Temperature Observations . — The following series of temperatures 
taken in the deepest part of the loch shows that on the date of the 
survey the whole body of water was practically uniform in temperature, 
the extreme range being less than 1° Fahr. : — 
Surface ... ... ... ... ... ... ... 47° ’0 Fahr. 
40 feet 46°-3 „ 
75 „ 46°-2 „ 
Loch an Tachdaidh (see Plate LXXXII.). — Loch an Tachdaidh 
lies about 2 miles to the east of Loch Calavie, and is almost continuous 
with Loch an Gead, the stream between them being a very short one. 
