science

List of largest unfragmented rivers

List of largest unfragmented rivers 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 List of largest unfragmented rivers rather than just read about it. In short: This is a list of the largest river basins without fragmentation by dams in their catchments, ordered by average annual discharge. To qualify for inclusion, a river must not only have no dams on its “main” stem, but also no dams on any tributary.

Key takeaways

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

Reference excerpt

This is a list of the largest river basins without fragmentation by dams in their catchments, ordered by average annual discharge. To qualify for inclusion, a river must not only have no dams on its “main” stem, but also no dams on any tributary. For this reason, major world rivers such as the Amazon, Lena, Irrawaddy, Amur, and Fraser are disqualified because of dams on tributary streams. Many of the rivers in this list have uncertain discharges. With the exception of those in Russia, streamgauges have seldom (if ever) been placed on the majority of the largest unfragmented river systems, due to the remoteness and/or ruggedness of the terrain in which they are located. Apart from the Fly which is clearly the largest, all ranks listed here are not perfectly certain, and there also exist a number of rivers in Sundaland that might qualify with reliable discharge data, such as the Kapuas.

See also List of longest undammed rivers

References Nilsson, Christer; Reidy, Catherine A.; Dynesius, Mats and Revenga Carmen; “Fragmentation and Flow Regulation of the World's Large River Systems”; in Science; 15 April 2005: Vol. 308 no. 5720 pp. 405–408; DOI: 10.1126/science.1107887 Nuttall, Mark (editor); Encyclopedia of the Arctic ISBN 1136786805

Worked examples

Example 1 — a first encounter with List of largest unfragmented rivers

Start with the simplest possible case. Write down what List of largest unfragmented rivers 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 List of largest unfragmented rivers 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 List of largest unfragmented rivers 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 List of largest unfragmented rivers

In research: List of largest unfragmented rivers 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 List of largest unfragmented rivers 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: List of largest unfragmented rivers is common in secondary-school and first-year university syllabi. It links to neighbouring topics Geography-related lists of superlatives, Lists of rivers, so understanding it makes those chapters shorter.
In everyday life: Look for List of largest unfragmented rivers 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.

Ask Teacher Smith questions about this articleOpens your AI tutor with a question about “List of largest unfragmented rivers” →

Affiliate

Preply — study more efficiently by working with a personal tutor. 50% off.

How to study List of largest unfragmented rivers in 20 minutes

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

Frequently asked questions

What is List of largest unfragmented rivers in simple terms?

Why does List of largest unfragmented rivers 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 List of largest unfragmented rivers?

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 List of largest unfragmented rivers.