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Northern river reversal

Northern river reversal is a biology 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 Northern river reversal rather than just read about it. In short: The Northern river reversal or Siberian river reversal was a large-scale project to divert the flow of the Northern rivers in the Soviet Union, which "uselessly" drain into the Arctic Ocean, southwards towards the populated agricultural areas of Central Asia, which lack water. Research and planning work on the project started in the 1930s and was carried out on a large scale in the 1960s through the early 1980s.

Northern river reversal — main illustration
Northern river reversal — illustration

Key takeaways

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

Reference excerpt

The Northern river reversal or Siberian river reversal was a large-scale project to divert the flow of the Northern rivers in the Soviet Union, which "uselessly" drain into the Arctic Ocean, southwards towards the populated agricultural areas of Central Asia, which lack water. Research and planning work on the project started in the 1930s and was carried out on a large scale in the 1960s through the early 1980s. The controversial project was abandoned in 1986, primarily for environmental reasons, without much actual construction work ever done. Since the 21st century, interest resurfaced for a potential resumption of the project.

History

Discussions and proposals

The project to turn Siberian rivers goes back to the 1830s, when tsarist surveyor Alexander Shrenk proposed it around the same time other major canal projects, such as Suez Canal and Panama Canal, were being proposed. In the 1930s, this idea of turning rivers was again discussed on a smaller scale. In November 1933, a special conference of the USSR Academy of Sciences approved a plan for a "reconstruction of the Volga and its basin", which included diverting parts of the Pechora and Northern Dvina into the Volga basin instead of the Arctic Ocean. Hydroproject conducted research in this aspect, with the dam and canal institute led by Sergey Zhuk. The institute developed some design plans, but they were not widely publicized and did not lead to construction work on the ground. In January 1961, several years after Zhuk's death, Nikita Khrushchev presented a memo by Zhuk and another engineer, G. Russo, about the river rerouting plan to the CPSU Central Committee. Despite the ousting of Khrushchev in 1964, discussions continued about potentially rerouting major rivers including Pechora, Tobol, Ishim, Irtysh, and Ob. The USSR Academy of Sciences held an environmental impact study with the participation of about 120 institutes and agencies and conducted a dozen conferences on this topic. The promoters of the project claimed that extra food production due to the availability of Siberian water for irrigation in Central Asia could provide food for about 200,000,000 people, with the goal not only to improve irrigation, but also to replenish the shrinking Aral Sea and Caspian Sea.

Start of construction In the 1970s, construction began on the Pechora–Kama Canal with the goal of diverting the Pechora into the Volga basin. In 1971, Soviet authorities revealed the use of three 15-kiloton PNEs spaced 165 metres (540 ft) apart, as part of the Nuclear Explosions for the National Economy program, claiming negligible radioactive fallout and manageable pollution. In March 1976, the 25th CPSU Congress approved the project diverting Siberian rivers southwards. However, the project did not move forward due to high costs, and no further construction work occurred on the Pechora–Kama canal.

Abandonment In 1986, in response to high financial cost and opposition from Siberian communities, the Soviet Politburo passed the resolution "On the Cessation of the Work on the Partial Flow Transfer of Northern and Siberian Rivers", which ended this project and halted discussion on this matter for more than a decade. It was estimated that 250 more nuclear detonations would have been required to complete the levelling for the channel if the procedure had been continued.

Potential resumption In the early 21st century, interest on this project again rose especially among Central Asian leaders. In September 2002, Uzbek president Islam Karimov held an informal summit with other Central Asian leaders to discuss potentially reviving this water diversion project. Yury Luzhkov, the mayor of Moscow at the time, was supportive of this project. In October 2025, the Russian Academy of Sciences decided to revive this project with modifications, namely using pipelines instead of canals for water transfer.

Environmental impact Scientists have come to different conclusions regarding the environmental impact of river reversals in Siberia. Physicist Glenn Werth from the Lawrence Livermore Laboratory in the University of California considered the environmental impact manageable, stating that the project would be "both safe and economical". By contrast, other scientists warned of different negative impacts this project may have on the environment. Some have warned that reducing the flow of warmer fresh water could cause the expansion of polar ice and shorten the growing season in Siberia, along with a reduction in rainfall due to changes in polar winds and currents. Others have warned that reducing river flow in Siberia would increase salinity in the Arctic Ocean, which would accelerate ice melt and worsen global warming. According to Alexey Yablokov, President of the NGO Centre for Russian Environmental Policy, 5–7% redirection of the Ob's water could lead to long-lasting changes in the climate of the Arctic and elsewhere in Russia, and he opposes these changes to the environment affected by Siberian water redirections to the south. Despite the increase in Siberian rainfall, the redirection has become highly politicised, and Yaroslav Ishutin, director of the Altai Krai Regional Department of Natural Resources and the Environment, claims that the Ob has no water to spare and that Siberia's water resources are threatened. Alexander Yanshin, who led a petition from academics against this project, voiced similar concerns about water shortages in Siberia, a decrease in fish stocks, drying up of marshes and peat fires which could lead to extinctions.

See also Water export Bradfield Scheme Coastal reservoir Chicago River reversal Grand Korean Waterway Great construction projects of communism, other ambitious Soviet projects Great Plan for the Transformation of Nature Indian Rivers Inter-link – commonly known as the Garland Canal project; a proposed project that aims to connect the perennial rivers of northern India with the seasonally-dry rivers of southern India; for the purposes of water supply and flood control. Irtysh–Karamay–Ürümqi Canal North American Water and Power Alliance South–North Water Transfer Project

References

Illustrations

Northern river reversal: The layout of one of the main proposed water transfer routes (via a Yenisei–Ob canal, down the Ob, up the Irtysh and Ishim, and then via a canal to the Aral Sea basin). The plan would involve other canals (not shown) to take the water further south.
The layout of one of the main proposed water transfer routes (via a Yenisei–Ob canal, down the Ob, up the Irtysh and Ishim, and then via a canal to the Aral Sea basin). The plan would involve other canals (not shown) to take the water further south.
Northern river reversal: Map of Russia showing rivers that could be redirected from the Arctic
Map of Russia showing rivers that could be redirected from the Arctic

Worked examples

Example 1 — a first encounter with Northern river reversal

Start with the simplest possible case. Write down what Northern river reversal claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In biology, 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 Northern river reversal 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 Northern river reversal 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 Northern river reversal

In research
Northern river reversal appears in biology 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 Northern river reversal 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
Northern river reversal is common in secondary-school and first-year university syllabi. It links to neighbouring topics Abandoned canal projects, Abandoned interbasin transfer, Cancelled projects, so understanding it makes those chapters shorter.
In everyday life
Look for Northern river reversal 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 Northern river reversal in 20 minutes

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

Frequently asked questions

What is Northern river reversal in simple terms?

The Northern river reversal or Siberian river reversal was a large-scale project to divert the flow of the Northern rivers in the Soviet Union, which "uselessly" drain into the Arctic Ocean, southwards towards the populated agricultural areas of Central Asia, which lack water. Research and planning…

Why does Northern river reversal matter?

Because it connects several biology 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 Northern river reversal?

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 Northern river reversal.

Tags

  • Abandoned canal projects
  • Abandoned interbasin transfer
  • Cancelled projects
  • Economy of Siberia
  • Economy of the Soviet Union
  • Irrigation in Russia
  • Proposals in the Soviet Union

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