WATEK CATCHMENT AREAS IN SCOTLAND 249 



owned areas, there are scarcely any woods, and no plantation 

 schemes are in contemplation. 



I. Perth (West), Dumbarton, Argyll, Bute, and 

 Renfrew Counties 



Gathering grounds, 59,513 acres, supplying eleven local 

 authorities; 3543 acres owned by two local authorities. 



Glasgow obtains its water supply from two sources, 

 Loch Katrine and the Gorbals Waterworks. Loch Katrine, 

 situated in the Highlands, 34 miles to the north, provides 

 the greater part of the city of Glasgow, as well as Renfrew 

 and several small towns and villages, with a remarkably 

 pure and abundant supply of water. The original level of 

 the lake was raised by embankment 9 feet, so that it now 

 has 3000 acres of water surface. An additional supply to 

 Loch Katrine is brought by a tunnel from Loch Arklet, 

 which has been raised 22 feet above its original level 

 and increased in surface from 217 to 551 acres by works 

 begun in 1909. The water undergoes no filtration, being 

 merely strained through fine wire-gauze netting to prevent 

 the passage of sticks and leaves into the pipes. The Loch 

 Katrine catchment area, including the Loch Arklet area, is 

 27,312 acres in extent, and consists of uncontaminated 

 sparsely populated moorland, with a great deal of peaty 

 surface. The ownership of the whole gathering ground 

 remains in private hands ; but in order to secure the 

 water supply from pollution, the feuing rights over the 

 entire drainage to Loch Katrine and Loch Arklet were pur- 

 chased by the Corporation at a cost of £18,300 ; and the 

 owners of the land within that area are prohibited from 

 erecting houses or buildings on any part of the gathering 

 ground. 



The Glasgow Corporation also utilise Loch Vennachar, 

 including Loch Drunkie, with a total catchment area of 

 24,686 acres, for compensation water. Recently the 

 gathering ground of Glenfinlas, 9600 acres, which forms 



