Loch Enoch
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Loch Enoch is a multi-basin freshwater loch in Galloway, to the east of Merrick and south of Mullwharchar. The loch is situated in a granite basin and has several small islands and some beaches on its shore. The sharp granite sand of these beaches was collected and sold for sharpening knives and scythes.[1] The catchment area's vegetation is mainly Purple Moor Grass and Heather.[2]
The loch's outflow supplies Loch Doon and the River Doon, both in Ayrshire.
Acidification
By 1800 the water of Loch Enoch had already become acidic.[3] J. McBain in his 1929 book The Merrick and the Neighbouring Hills. Tramps by Hill, Stream and Loch describes a trout that 'bore the unmistakable marks of a Loch Enoch trout, i.e. it was minus the lower half of its tail and part of its ventral fins'.[4] McBain writes that the last recorded trout caught was in 1899. Since 1940 the loch became more acidic due to industrial emissions[3] and in the 1950s it completely lost its fish population.[5] In 1994 it was restocked with 3000 trout.[4] The loch has not become more acidic since the mid-1970s and has become slightly less acidic from the 1980s onwards,[2] with the pH increasing slowly from around 4.3 in 1978 to 4.9 in 2003.[6] Between 1983 and 2003 the loch's DOC levels increased.[7]
Water analysis
| Element | Concentration μg/L |
|---|---|
| CaCO3 | −500 |
| Li | 0.297 |
| Al | 83.9 |
| V | 0.263 |
| Cr | 0.147 |
| Fe | 49.3 |
| Fe DRC | 46.4 |
| Mn | 6.7 |
| Co | 0.064 |
| Ni | 0.348 |
| Cu | 0.247 |
| Zn | 3.14 |
| Se | 0.178 |
It is considered relatively oligotrophic.[9]
References
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