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Loch Shiel

Loch Shiel is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Loch Shiel rather than just read about it. In short: See Glen Shiel for the much smaller Loch Shiel in Lochalsh. Loch Shiel (Scottish Gaelic: Loch Seile) is a deep freshwater loch situated 20 kilometres (12 mi) west of Fort William in Lochaber, Scotland.

Loch Shiel — main illustration
Loch Shiel — illustration

Key takeaways

  • Loch Shiel belongs to science; place it in that map before memorising details.
  • Learn the definition first, then one example that makes the definition concrete.
  • Connect Loch Shiel to a quantity you can measure, compute or draw — that is where exam questions come from.
  • Reproduce the core statement of Loch Shiel from memory before moving on to harder problems.

Reference excerpt

See Glen Shiel for the much smaller Loch Shiel in Lochalsh. Loch Shiel (Scottish Gaelic: Loch Seile) is a deep freshwater loch situated 20 kilometres (12 mi) west of Fort William in Lochaber, Scotland. At 28 kilometres (17+1⁄2 mi) long it is the 4th longest loch in Scotland, and is the longest to have retained a natural outflow without any regulation of its water level, being 120 m (393 ft) deep. Its nature changes considerably along its length, being deep and enclosed by mountains in the north east and shallow surrounded by bog and rough pasture in the south west, from which end the 4 km River Shiel drains to the sea in Loch Moidart near Castle Tioram. The surrounding highlands are picturesque but relatively rarely climbed as none quite reaches the 3,000 ft (910 m) required for Munro status. A number of the hills are classified as Corbetts, including Beinn Resipol, Sgùrr Ghiubhsachain and Sgorr Craobh a' Chaorainn on the southern side of the loch; and Beinn Odhar Bheag on the northern side. The area is well wooded compared to the many Highland areas that have suffered from overgrazing. The view of the loch looking south from the Glenfinnan monument, showing wooded hillsides with bare summits rising steeply from a fjord-like loch, has become one of the most famous images of the Scottish Highlands. Loch Shiel is less than 10 metres above sea level, and was formed at the end of the last ice age when glacial deposits blocked what was formerly a sea loch.

Nature and conservation

Loch Shiel is a Special Protection Area (SPA) due to its importance for breeding black-throated divers, and the area surrounding the loch is also designated as an SPA due to the presence of breeding golden eagles. Other bird species living around the loch include white-tailed sea eagles, red-throated divers, peregrine falcons, Eurasian sparrowhawks, common kestrels, ospreys and hen harrier. Several species of duck are also present, including little grebes, goosanders, red-breasted mergansers, mallards, goldeneyes and tufted ducks. Fish in the loch include salmon, sea trout and brown trout. Fishing rights are controlled by the Lochaber Fisheries Trust, who issue permits for fishing from Acharacle at the south west end of the loch. There are areas of remnant Caledonian Forest on the islands of the loch such as Eilean Camas and Eilean Ghleann Fhoinainn, as well as at Meall na h-Airigh at the northern end of the loch. There are also areas of oak and alder woodlands (see Celtic rain forest) on the shoreline of the loch which are designated as a Special Area of Conservation by NatureScot, who noted that overgrazing and invasive species were threats to the area. The shoreline of the loch is also home to a population of otters. Claish Moss, to the south of the loch, is one of the best examples of a raised bog in Britain. The bog has developed over the past 8,000 years, with pollen grains preserved by the peat forming a record of the bog's plant life since the bog first began to form. The bog is designated as an SAC, and was also formerly a national nature reserve, but was de-designated in 2011 due to poor access for visitors. The loch gives its name to Loch Shiel National Scenic Area, one of 40 such areas in Scotland, which are defined so as to identify areas of exceptional scenery and to ensure its protection via the planning system by the restriction of certain forms of development. The Loch Shiel NSA covers 13,045 ha, and extends to the summits of the hills on either side of the loch, as well as the hills surrounding Glen Hurich and the monument at Glenfinnan.

History A ruined medieval chapel found on the largest island, Eilean Fhianain, is dedicated to St. Finan, and may stand on the site of a cell thought to have been built on the island by the saint in the seventh century. The chapel is thought to have been built by Alan MacRuaridh, a chief of Clan Ranald; the clan used the island as a burial place until the end of the sixteenth century. The island continues to be used for burials, and is a Scheduled Ancient Monument. Acharacle, at the south of the Loch, is the site of the 1140 battle in which Somerled defeated the Norse to found the ruling dynasty of Lord of the Isles. During these times, the loch had strategic importance as a communications route through the mountains, as the short River Shiel was easily navigable in ancient times, however is no longer navigable as the depth drops to less than a foot. In the medieval period the loch formed the boundary between the provinces or lordships of Moidart to the west, Ardgour to the east, and Sunart in the south. Castle Tioram on the tidal island Eilean Tioram in Loch Moidart, is located so as to control access to Loch Shiel, and thus to Lochaber and the Great Glen, from the sea. The castle appears to have originally been a principal stronghold of Clann Ruaidhrí. According to early modern tradition, preserved by the seventeenth-century Sleat History, the castle was erected by Áine Nic Ruaidhrí (fl. 1318–50), and certainly served as the seat of the latter's Clann Raghnaill descendants for centuries. Alasdair mac Mhaighstir Alasdair, the poet and Scottish Gaelic tutor of Bonnie Prince Charlie, was born and raised in the area. At the start of the Jacobite rising of 1745, the prince disembarked at Loch nan Uamh and was rowed the length of Loch Shiel in order to raise his standard at Glenfinnan. After the defeat of the rising at Culloden a number of prominent Jacobites, including Cameron of Lochiel, hid on the small island of Eilean Mhic Dhomnuill Dhuibh in Loch Shiel. In 1842, during the Highland Clearances when tenants were cleared off the land to make way for sheep farming, the women of Loch Shiel apparently drove off the eviction party. The women were apparently armed with shearing hooks and aprons filled with stones.

… excerpt ends here. Continue reading the full article.

Illustrations

Loch Shiel illustration
Loch Shiel illustration
Loch Shiel illustration
Loch Shiel illustration
Loch Shiel illustration

Worked examples

Example 1 — a first encounter with Loch Shiel

Start with the simplest possible case. Write down what Loch Shiel claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Loch Shiel before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Loch Shiel ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Loch Shiel

In research
Loch Shiel appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry
Engineering practice reuses Loch Shiel in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom
Loch Shiel is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1842 in Scotland, Freshwater lochs of Scotland, Lochaber, so understanding it makes those chapters shorter.
In everyday life
Look for Loch Shiel outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.
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How to study Loch Shiel in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what Loch Shiel means in your own words.
  3. Compare your version with the excerpt and mark what you missed.
  4. Work through the three examples above with pen and paper.
  5. Explain Loch Shiel out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Loch Shiel in simple terms?

See Glen Shiel for the much smaller Loch Shiel in Lochalsh. Loch Shiel (Scottish Gaelic: Loch Seile) is a deep freshwater loch situated 20 kilometres (12 mi) west of Fort William in Lochaber, Scotland.

Why does Loch Shiel matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Loch Shiel?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Loch Shiel.

Tags

  • 1842 in Scotland
  • Freshwater lochs of Scotland
  • Lochaber
  • Lochs of Highland (council area)
  • Lochs of Lochaber
  • National scenic areas of Scotland
  • Oligotrophic lakes
  • Shiel Basin
  • Sites of Special Scientific Interest in North Lochaber
  • Sites of Special Scientific Interest in South Lochaber

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