science

Lochan na h-Earba

Lochan na h-Earba 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 Lochan na h-Earba rather than just read about it. In short: The single name Lochan na h-Earba is applied to two lochs above (and to the south of) Loch Laggan in Highland, Scotland, close to the historic boundary between Lochaber and Badenoch. It is thought that the two lochs once formed a single loch, but became separated by the build up alluvial deposits from the Moy Burn (Scottish Gaelic: Allt a' Mhaigh), which now joins the short watercourse that connects the two lochs.

Key takeaways

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

Reference excerpt

The single name Lochan na h-Earba is applied to two lochs above (and to the south of) Loch Laggan in Highland, Scotland, close to the historic boundary between Lochaber and Badenoch. It is thought that the two lochs once formed a single loch, but became separated by the build up alluvial deposits from the Moy Burn (Scottish Gaelic: Allt a' Mhaigh), which now joins the short watercourse that connects the two lochs. Ordnance Survey maps of the area show a single name printed across both lochs. They occupy a narrow glen running southwest to northeast, and roughly parallel with Loch Laggan, from which they are separated by the Binnein Shuas range of hills. The Munros of Geal Charn and Creag Pitridh are the highest peaks of the hills to the southeast. The lochs lie on the Ardverikie Estate. They have been used as the location for several film and television productions, most frequently appearing regularly in the BBC series Monarch of the Glen, which was largely filmed in and around the Laggan area. Scenes from Mrs Brown and Outlander have also been filmed here. Both lochs were fully surveyed by the Bathymetrical Survey of the Fresh-Water Lochs of Scotland in 1902.

Earba Storage project

A 1.8 GW / 40 GWh pumped-storage hydroelectricity project received planning consent in 2025, with Earba as the lower reservoir, and Loch Leamhain as the higher reservoir at 650 m (2,130 ft) altitude.

The west loch The west loch sits an elevation of 351 metres (1,151.7 ft), and is 2.8 kilometres (1.75 mi) in length. It has a surface area of 106 hectares (263 acres), and contains 11,600,000 cubic metres (408,000,000 cu ft) of water. It has a maximum depth of 25 metres (81 ft), and a mean depth of 11 metres (35.5 ft). It is fed by numerous small burns, with the most significant being those descending from Beinn a' Chlachair.

The east loch

The east loch is fed chiefly by the outflow from the west loch, to which it is connected by a short watercourse. It is slightly lower than the west loch, with an elevation of 348 metres (1,142.3 ft). It is the smaller of the two lochs, being 2 kilometres (1.2 mi) long, with a surface area of 59 hectares (146 acres), and contains 5,400,000 cubic metres (191,000,000 cu ft) of water. It has a maximum depth of 21 metres (69 ft), and a mean depth of 9 metres (31 ft).

References

Illustrations

Worked examples

Example 1 — a first encounter with Lochan na h-Earba

Start with the simplest possible case. Write down what Lochan na h-Earba 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 Lochan na h-Earba 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 Lochan na h-Earba 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 Lochan na h-Earba

In research: Lochan na h-Earba 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 Lochan na h-Earba 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: Lochan na h-Earba is common in secondary-school and first-year university syllabi. It links to neighbouring topics Freshwater lochs of Scotland, Lochs of Highland (council area), Lochy Basin, so understanding it makes those chapters shorter.
In everyday life: Look for Lochan na h-Earba 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 Lochan na h-Earba in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Lochan na h-Earba means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Lochan na h-Earba out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Lochan na h-Earba in simple terms?

Why does Lochan na h-Earba 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 Lochan na h-Earba?

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 Lochan na h-Earba.