science

Salween River

Salween River 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 Salween River rather than just read about it. In short: The Salween is a Southeast Asian river, about 3,289 km (2,044 mi) long, flowing from the Tibetan Plateau south into the Andaman Sea. The Salween flows primarily within southwest China and eastern Myanmar, with a short section forming the border of Myanmar and Thailand.

Key takeaways

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

Reference excerpt

The Salween is a Southeast Asian river, about 3,289 km (2,044 mi) long, flowing from the Tibetan Plateau south into the Andaman Sea. The Salween flows primarily within southwest China and eastern Myanmar, with a short section forming the border of Myanmar and Thailand. Throughout most of its course, it runs swiftly through rugged mountain canyons. Despite the river's great length, only the last 90 km (56 mi) are navigable, where it forms a modest estuary and delta at Mawlamyine. The river is known by various names along its course, including the Thanlwin (named after Elaeocarpus sp., an olive-like plant that grows on its banks) in Myanmar and the Nu Jiang (or Nu River, named after Nu people) in China. The commonly used spelling "Salween" is an anglicisation of the Burmese name dating from 19th-century British maps. Due to its great range of elevation and latitude coupled with geographic isolation, the Salween basin is considered one of the most ecologically diverse regions in the world. Along with the Lancang and Jinsha rivers, it flows through the Three Parallel Rivers World Heritage Site, which is believed to support over 25% of the world’s animal species. During its course the Salween provides water for agriculture and supports abundant fisheries, especially in the delta region. The Salween basin is home to numerous ethnic minority groups, whose ancestors largely originated in the Tibetan Plateau and northwest China. Starting about 5,000 years ago, people began migrating south along the river, establishing small kingdoms and city-states. During the last 1,000 years, the Salween has defined various frontiers of the Burmese empires to the west, the Kingdom of Siam to the south, and Imperial China to the east, with the Shan States along the middle Salween being a frequently contested area. In the 19th century, the British Empire invaded Burma with Mawlamyine serving as the colonial capital for many decades. Since Burmese independence in 1948, the Salween basin has been a battleground for several fronts of the Myanmar civil war, with large areas in Shan State and Karen State (Kayin State) contested between the Myanmar military and local ethnic militias. The Salween is one of the least fragmented large river systems in Asia, with only a few small dams in the headwaters of the river and on tributaries. The river has extremely high hydropower potential, with a fall of more than 5,000 m (16,000 ft) from its source. Since the 1970s, the Myanmar and Thai governments have sought to build massive hydroelectric dams along the river. China also planned to dam the upper Salween, but in 2016 these plans were dropped in favor of establishing a national park. The future of dam projects in Myanmar and Thailand remains uncertain.

Geography and naming The Salween basin includes about 283,500 km2 (109,500 mi2), of which 48 percent is in China, 44 percent in Myanmar, and 8 percent in Thailand. The basin is extremely long and narrow, situated between the Irrawaddy and Brahmaputra river systems on the west and the Mekong system on the east, and sharing a shorter boundary with the Yangtze system to the north. With a mean elevation of 3,515 m (11,532 ft), the Salween basin includes numerous glaciated mountain ranges, and the river flows for much of its length at high elevation. In China, the Salween basin is situated in Tibet Autonomous Region and Yunnan. In Myanmar the Salween flows through Shan State, Karenni State, Karen State and Mon State. In Thailand the Salween borders only on Mae Hong Son province, with tributaries extending into Chiang Mai, Tak and Kanchanaburi province. The average flow rate at the China–Myanmar border is 68.74 km3/a (2,178 m3/s). Along the Myanmar–Thailand border the Salween carries an average annual flow of 200 km3/a (6,300 m3/s). The estimated flow rate at the mouth is 6,600 m3/s (230,000 cu ft/s). About 89 percent of the annual flow occurs in the monsoon season (mid-May through November), and only 11 percent in the remainder of the year. The average volume of sediment in the Salween Delta is around 180 million tonnes per year. The population of the Salween basin is estimated at 24 million, or 76 persons/km2. About 10 million people live adjacent or close to the river proper. People of the Salween basin represent a large diversity of ethnic groups. In China, the Salween basin is home to Blang, Derung, Lisu, Nu, Palaung (De'ang), Shan, Tibetan and Wa. In Myanmar, the major ethnic groups include Akha, Lahu, Lisu, Hmong, Kachin, Karen, Karenni, Kokang, Pa'O, Shan and Yao. The highest population densities are in Mon State (300 people/km2) and Yunnan (100 people/km2), while the lowest population density is in Tibet (5 people/km2).

Upper Salween (China)

… excerpt ends here. Continue reading the full article.

Illustrations

Worked examples

Example 1 — a first encounter with Salween River

Start with the simplest possible case. Write down what Salween River 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 Salween River 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 Salween River 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 Salween River

In research: Salween River 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 Salween River 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: Salween River is common in secondary-school and first-year university syllabi. It links to neighbouring topics Border rivers, Freshwater ecoregions, International rivers of Asia, so understanding it makes those chapters shorter.
In everyday life: Look for Salween River 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 Salween River in 20 minutes

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

Frequently asked questions

What is Salween River in simple terms?

Why does Salween River 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 Salween River?

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 Salween River.