science

Gogeldrie Weir

Gogeldrie Weir 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 Gogeldrie Weir rather than just read about it. In short: The Gogeldrie Weir is a heritage-listed weir and recreation area on the Murrumbidgee River near Narrandera, in the Riverina region of New South Wales, Australia. It was designed and built by WC & IC from 1958 to 1959.

Key takeaways

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

Reference excerpt

The Gogeldrie Weir is a heritage-listed weir and recreation area on the Murrumbidgee River near Narrandera, in the Riverina region of New South Wales, Australia. It was designed and built by WC & IC from 1958 to 1959. It was added to the New South Wales State Heritage Register on 2 April 1999.

History The Gogeldrie Weir was completed in 1959 to divert water from the Murrumbidgee River to the Coleambally Irrigation Area via the Coleambally Canal, and to part of the Murrumbidgee Irrigation Areas and associated irrigation districts via the Stuart Canal. The Coleambally Irrigation Scheme was one of the last major schemes into public irrigation by the government to enable agriculture to expand in the Coleambally south of the Murrumbidgee. The scheme utilised the regulated flows from the Snowy Scheme and the Blowering Dam. The mechanics of Coleambally were similar to the MIA, with a major diversionary weir at Gogeldrie on the Murrumbidgee distributing water by gravity through networks of canals and channels. The first farms were taken up in 1960.

Description The Gogeldrie Weir is one of seven major weirs on the Murrumbidgee River. It is approximately 63 kilometres (39 mi) downstream of Narrandera. The weir is 85.34 metres (280 ft) between abutments. The weir structure comprises concrete sill floor reinforced with steel sheet piling cut-off walls, the floor is surmounted by concrete piers and steel superstructure providing supports for the steel sluice gates. There are six gates each measuring 6.1 metres (20 ft) high and 12.2 metres (40 ft) wide, weighing 24 tonnes (24 long tons; 26 short tons). The gates are opened individually by electric motors placed centrally between piers. The gates move vertically and the counterweights drop into the counterweight wells allowed for in each of the concrete piers. The original gate control meter has been replaced by computerised meter in 1996. The weir provides a pool level suitable for the diversion of water from the Murrumbidgee River into Coleambally Canal supplying the Coleambally Irrigation Area, and via Coononcoocabil Lagoon into the Stuart Canal to supply part of the Murrumbidgee Irrigation Areas and associated irrigation districts. At full supply level, the weir holds 7,400 megalitres (260×10^6 cu ft). The effective capacity of both canals for long term operation at about 5,500 megalitres (190×10^6 cu ft) per day.

Heritage listing As at 6 December 2000, Gogeldrie Weir is associated with the Coleambally Irrigation Area and also part of the Murrumbidgee Irrigation Area. It is a major component in the Coleambally Irrigation Scheme being the diversion weir that controls and diverts water from the Murrumbidgee River to the Coleambally area. The weir is a landmark in the region. Gogeldrie Weir was listed on the New South Wales State Heritage Register on 2 April 1999.

Illustrations

Worked examples

Example 1 — a first encounter with Gogeldrie Weir

Start with the simplest possible case. Write down what Gogeldrie Weir 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 Gogeldrie Weir 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 Gogeldrie Weir 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 Gogeldrie Weir

In research: Gogeldrie Weir 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 Gogeldrie Weir 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: Gogeldrie Weir is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1959 establishments in Australia, Dams completed in 1959, Dams in New South Wales, so understanding it makes those chapters shorter.
In everyday life: Look for Gogeldrie Weir 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 Gogeldrie Weir in 20 minutes

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

Frequently asked questions

What is Gogeldrie Weir in simple terms?

Why does Gogeldrie Weir 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 Gogeldrie Weir?

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 Gogeldrie Weir.