science

Lough Lene

Lough Lene 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 Lough Lene rather than just read about it. In short: Lough Lene (Irish: Loch Léinn) is a lake situated in north County Westmeath, Ireland, between the villages of Castlepollard, Collinstown and Fore. It has a rich and varied history, including several prehistoric burial sites, old ruins, a number of ancient village-type communal circular dwellings locally called ringforts, stiles, and mass paths.

Key takeaways

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

Reference excerpt

Lough Lene (Irish: Loch Léinn) is a lake situated in north County Westmeath, Ireland, between the villages of Castlepollard, Collinstown and Fore. It has a rich and varied history, including several prehistoric burial sites, old ruins, a number of ancient village-type communal circular dwellings locally called ringforts, stiles, and mass paths. Lough Lene also has claims to being the home to kings and Vikings, such as Turgesius who had one of his forts upon the hill on the southwest overlooking the lake from the Ranaghan side, before being killed by Máel Sechnaill mac Maíl Ruanaid. Lough Lene's water acts as a reservoir for several surrounding villages.

Geography and Hydrology Lough Lene has a water surface of 4.16 km2. It is fed by two little streams on its western end and its southern bank. It discharges into River Deal which joins River Boyne from the left near Donore Castle. From the outlet of Lough Lene, there is about 1 km of course to the junction with River Deel, which is about 2 km upstream of Lough Adeel

History and folklore

The name of the lake has appeared in a variety of ways including Lane, Léin and Leibhinn. Sir Henry Piers believed the lake's name translated as "Lake of Learning", tying in with his translation of Fore as the "Town of Books". However, other sources seem more inclined to the tradition that the lake was named after the daughter of the fabled Manannán mac Lir (see Children of Lir). The lake is described in Samuel Lewis's Topographical Dictionary of Ireland (1837) as being an irregular oval shape, possibly 3.2 km (2.0 mi) long by 1.7 km (1.1 mi) broad. A fresh water lake, most sources focus on the clarity of the water, with the term "gin clear" being used to describe it. It sits approximately 97 metres (312 ft) above sea level and covers approximately 500 hectares. Nun's Island on Lough Lene was once the site of a convent. Baile na gCailleach, the old Irish language name for the town of Collinstown, when translated means "the town of the veiled women" or "the town of the old hags". This was an irreverent name which referred to the nuns of the convent on the island. The two other islands are Castle Island, and Turgesius Island. An ancient bell was found on Castle Island in 1881 and is now in the National Museum of Ireland. A half size reproduction of the ancient bell was presented to Dáil Éireann in 1931 by the widow of a former member of the House, Bryan Cooper, and it has since been the bell of the Ceann Comhairle (chairperson) of Dáil Éireann. A survey revealed that Nun's Island was a complex stone structure with causeway-like features, while Castle Island showed the best potential, with a large assemblage of worked timbers. Two logboats were also recovered in 1968, one with dovetail joints. This work continues today. These Roman-period log-boats were constructed for lake fishing, and were about 8 m long, 1.5 m wide, and 80 centimetres deep, were made of oak, yew, and possibly willow. The boats were paddle propelled. Other notable constructional features are that they were complex boats: carved; dugout (extended); mortice-and-tenon; and sewn. In 1969, Collinstown, Rickardstown and Glenidan formed a Gaelic Athletic Association (GAA) club called the Lough Lene Gaels.

Water sports

Lough Lene was one of the first freshwater lakes in Ireland to obtain a Blue Flag for its pollution-free water. Swimming, sailing and windsurfing are popular in the lake, and dressing-rooms and picnic areas are available at the point locally referred to as "the Cut". "The Cut" is situated approximately 2 km north of the Collinstown cross-roads on the east end of the lake. Due to the quality and clarity of the water, together with the safe access at "the Cut", the lough is a popular bathing and swimming location. Local Triathlon clubs and Meath Masters Swimming Club train and hold events here regularly. In Summertime, average water temperatures are around 17c. One of the more popular training swims is out to Turgesius Island – a distance of one mile from the slipway at the cut. In 2022, a permanent "swim trail" of 5 large swimmers buoys was laid out along the North Shore in a 750m course (1500m return). More buoys were also installed in the separate designated bathing area.

Ecology

Conservation Parts of the lake are protected, under the European Union's Habitats Directive (92/43EEC), as a Special Area of Conservation. Lough Lene is a deep lake, which is 20 metres (66 ft) deep in some parts. It is a clear hard water lake with marl deposition particularly noticeable along long stretches of its shores. The lake supports a range of pondweeds that include Potamogeton perfoliatus and P. lucens, Canadian pondweed (Elodea canadensis), and a variety of stoneworts (Chara spp., such as C. pedunculata and C. curta) which are marl or hard-water lake indicators. A stony shore line fringes much of the lake, where there are species such as spike-rush (Eleocharis sp.) jointed rush (Polygonum persicaria), marsh pennywort (Hydrocotyle vulgaris), and sedges (Carex spp.). A narrow fringe of emigerent plant species dominated by common reed (Phragmites australis) and common club-rush (Schoenoplectus lacustris) occurs along some stretches of the lakeshore. Patches of wet woodland colonise former areas of cut-away and other low-lying areas close to the lake and are dominated by willows (Salix spp.), birch (Betula sp.) and alder (Alnus glutinosa) with patches of common reed also occurring. These areas support a rich flora. The ground flora of the wood at the northwestern end of the lake includes a range of peat mosses (Sphagnum spp.), bilberry (Vaccinium myrtillus) and heather (Calluna vulgaris). Alder carr occurs on the juttland into the lake at its northwestern side. Freshwater marsh/fen vegetation, with such species as purple moor-grass (Molinia caerulea), bottle sedge (Carex rostrata), black bog-rush (Schoenus nigricans), and marsh cinquefoil (Potentilla palustris), occurs in certain areas near the lake; one such area supports a population of rare round-leaved wintergreen (Pyrola rotundifolia subsp. rotundifolia).

… excerpt ends here. Continue reading the full article.

Illustrations

Worked examples

Example 1 — a first encounter with Lough Lene

Start with the simplest possible case. Write down what Lough Lene 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 Lough Lene 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 Lough Lene 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 Lough Lene

In research: Lough Lene 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 Lough Lene 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: Lough Lene is common in secondary-school and first-year university syllabi. It links to neighbouring topics Archaeological sites in County Westmeath, Glacial lakes, Lakes of County Westmeath, so understanding it makes those chapters shorter.
In everyday life: Look for Lough Lene 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 Lough Lene in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Lough Lene 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 Lough Lene out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Lough Lene in simple terms?

Why does Lough Lene 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 Lough Lene?

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 Lough Lene.