Loch Valley
Encyclopedia
Loch Valley is a loch
in Galloway Forest Park
to the east of Buchan Hill, north of the Rig of the Jarkness and southwest of Craignaw
. It drains via Gairland Burn down to Loch Trool
.
The loch has a catchment area entirely on the Loch Doon
granite
, is oligotrophic, and has suffered from gradual acidification since the mid-19th century leading to the elimination of the original Brown Trout
population. It has recovered to some extent, with the pH
increasing slowly from around 4.4 in 1978 to 5.2 in 2003..
Between 1983 and 2003 the loch's dissolved organic carbon levels increased, and the loch had a sediment
accumulation rate of around 0.01 g cm−2 yr−1 from 1850 to 1975.
Loch
Loch is the Irish and Scottish Gaelic word for a lake or a sea inlet. It has been anglicised as lough, although this is pronounced the same way as loch. Some lochs could also be called a firth, fjord, estuary, strait or bay...
in Galloway Forest Park
Galloway Forest Park
Galloway Forest Park is a woodland park in Scotland, principally covering woodland in Dumfries and Galloway. It is operated by Forestry Commission Scotland....
to the east of Buchan Hill, north of the Rig of the Jarkness and southwest of Craignaw
Craignaw
Craignaw is a small but very rocky hill in centre of the Galloway Hills of southern Scotland. Unlike many hills in the Southern Uplands, Craignaw has a complex and rocky summit area, with a long line of crags and rough ground on the east side. The hill is largely composed of granite...
. It drains via Gairland Burn down to Loch Trool
Loch Trool
Loch Trool is a body of water in Galloway, south-west Scotland lying in the valley of Glen Trool. It is the source of the Water of Trool which flows to the Water of Minnoch and the Cree.It was the location, in 1307, of the Battle of Glen Trool....
.
The loch has a catchment area entirely on the Loch Doon
Loch Doon
Loch Doon is a body of water, in Carrick, Scotland. The River Doon issues from its northern end, while the loch itself receives waters from Loch Enoch via Eglin Lane....
granite
Granite
Granite is a common and widely occurring type of intrusive, felsic, igneous rock. Granite usually has a medium- to coarse-grained texture. Occasionally some individual crystals are larger than the groundmass, in which case the texture is known as porphyritic. A granitic rock with a porphyritic...
, is oligotrophic, and has suffered from gradual acidification since the mid-19th century leading to the elimination of the original Brown Trout
Brown trout
The brown trout and the sea trout are fish of the same species....
population. It has recovered to some extent, with the pH
PH
In chemistry, pH is a measure of the acidity or basicity of an aqueous solution. Pure water is said to be neutral, with a pH close to 7.0 at . Solutions with a pH less than 7 are said to be acidic and solutions with a pH greater than 7 are basic or alkaline...
increasing slowly from around 4.4 in 1978 to 5.2 in 2003..
Between 1983 and 2003 the loch's dissolved organic carbon levels increased, and the loch had a sediment
Sediment
Sediment is naturally occurring material that is broken down by processes of weathering and erosion, and is subsequently transported by the action of fluids such as wind, water, or ice, and/or by the force of gravity acting on the particle itself....
accumulation rate of around 0.01 g cm−2 yr−1 from 1850 to 1975.
Water Analysis
| Element | Concentration μg/l |
|---|---|
| CaCO3 Calcium carbonate Calcium carbonate is a chemical compound with the formula CaCO3. It is a common substance found in rocks in all parts of the world, and is the main component of shells of marine organisms, snails, coal balls, pearls, and eggshells. Calcium carbonate is the active ingredient in agricultural lime,... |
-100 |
| Li Lithium Lithium is a soft, silver-white metal that belongs to the alkali metal group of chemical elements. It is represented by the symbol Li, and it has the atomic number 3. Under standard conditions it is the lightest metal and the least dense solid element. Like all alkali metals, lithium is highly... |
0.352 |
| Al Aluminium Aluminium or aluminum is a silvery white member of the boron group of chemical elements. It has the symbol Al, and its atomic number is 13. It is not soluble in water under normal circumstances.... |
130 |
| V Vanadium Vanadium is a chemical element with the symbol V and atomic number 23. It is a hard, silvery gray, ductile and malleable transition metal. The formation of an oxide layer stabilizes the metal against oxidation. The element is found only in chemically combined form in nature... |
0.263 |
| Cr Chromium Chromium is a chemical element which has the symbol Cr and atomic number 24. It is the first element in Group 6. It is a steely-gray, lustrous, hard metal that takes a high polish and has a high melting point. It is also odorless, tasteless, and malleable... |
0.199 |
| Fe FE Fe or FE may refer to:* Iron * Fe , the f-rune of the Younger Futhark* Fe * Fe * "Fe" , a song by Jorge González... |
45.9 |
| Fe DRC | 43.9 |
| Mn Manganese Manganese is a chemical element, designated by the symbol Mn. It has the atomic number 25. It is found as a free element in nature , and in many minerals... |
11.0 |
| Co Cobalt Cobalt is a chemical element with symbol Co and atomic number 27. It is found naturally only in chemically combined form. The free element, produced by reductive smelting, is a hard, lustrous, silver-gray metal.... |
0.063 |
| Ni Nickel Nickel is a chemical element with the chemical symbol Ni and atomic number 28. It is a silvery-white lustrous metal with a slight golden tinge. Nickel belongs to the transition metals and is hard and ductile... |
0.852 |
| Cu Copper Copper is a chemical element with the symbol Cu and atomic number 29. It is a ductile metal with very high thermal and electrical conductivity. Pure copper is soft and malleable; an exposed surface has a reddish-orange tarnish... |
0.209 |
| Zn Zinc Zinc , or spelter , is a metallic chemical element; it has the symbol Zn and atomic number 30. It is the first element in group 12 of the periodic table. Zinc is, in some respects, chemically similar to magnesium, because its ion is of similar size and its only common oxidation state is +2... |
3.43 |
| As Arsenic Arsenic is a chemical element with the symbol As, atomic number 33 and relative atomic mass 74.92. Arsenic occurs in many minerals, usually in conjunction with sulfur and metals, and also as a pure elemental crystal. It was first documented by Albertus Magnus in 1250.Arsenic is a metalloid... |
0.226 |
| Se Selenium Selenium is a chemical element with atomic number 34, chemical symbol Se, and an atomic mass of 78.96. It is a nonmetal, whose properties are intermediate between those of adjacent chalcogen elements sulfur and tellurium... |
0.198 |