THE FRESH-WATER LOCHS OF SCOTLAND. 
101 
LOCHS OF THE GALDENOCH BASIN. 
A VERY small basin on the west coast of Wigtownshire, having only one 
small, shallow, and apparently artificial, loch (Lochnaw), within the 
grounds of Lochnaw Castle. The Galdenoch has a course of about three 
miles in length, flowing from Lochnaw westward to the North Channel. 
Lochnaw (see Plate XXXIX.). — A small and nearly round loch, entirely 
surrounded by trees, 4 miles to the west of the town of Stranraer. It is 
barely half a mile in length, and one-third of a mile broad. There are 
several small, stony islands. The bottom is flat, and over the greater part 
of the loch the depth is 5 or 6 feet. The mean depth is 4 feet, the area 
about 47 acres, and the volume of water 9 millions of cubic feet. The 
outflow is by a small burn, with a stony channel, running westward. The 
area drained is a quarter of a square mile. The surface, on August 22, 
1903, was 255*3 feet above sea-level, a little higher than the elevation 
determined by the Ordnance Survey, on April 11, 1893, viz. 255*1 feet. 
The temperature of the water was 61°*0 Eahr. 
From the following table it will be seen that in the thirteen lochs 
under consideration, 1028 soundings were taken, and that the aggregate 
area of the water-surface is nearly 3J square miles, so that the average 
number of soundings per square mile of surface is 302. The aggregate 
volume of water contained in the lochs is estimated at 1935 millions of 
cubic feet. The area drained by these lochs is over 75 square miles, 
or 22 times the area of the lochs. 
