science

Portland Canal

Portland Canal 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 Portland Canal rather than just read about it. In short: Portland Canal is an arm of Portland Inlet, one of the principal inlets of the British Columbia Coast. It is approximately 114 km (71 mi) long.

Key takeaways

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

Reference excerpt

Portland Canal is an arm of Portland Inlet, one of the principal inlets of the British Columbia Coast. It is approximately 114 km (71 mi) long. The Portland Canal forms part of the border between southeastern Alaska and British Columbia. The name of the entire inlet in the Nisga'a language is Kʼalii Xkʼalaan, with xkʼalaan meaning "at the back of (someplace)". The upper end of the inlet was home to the Tsetsaut (Jitsʼaawit in Nisgaʼa), who after being decimated by war and disease were taken under the protection of the Laxsgiik (Eagle) chief of the Nisgaʼa, who holds the inlet's title in native law. Despite its naming as a canal, the inlet is a fjord, a completely natural and not man-made geographic feature, and extends 114.6 km (71.2 mi) northward from the Portland Inlet at Pearse Island, British Columbia, to Stewart, British Columbia, and Hyder, Alaska. Observatory Inlet joins the Portland Canal at Ramsden Point, where both merge with Portland Inlet. Pearse Canal joins Portland Canal at the north end of Pearse Island. Portland Canal was given its name by George Vancouver in 1793, in honour of William Cavendish-Bentinck, 3rd Duke of Portland. The use of the word canal to name inlets on the British Columbia Coast and the Alaska Panhandle is a legacy of the Spanish exploration of the area in the 18th century. For example, Haro Strait between Victoria and the San Juan Islands was originally Canal de Haro. The English cognate to the Spanish canal is "channel", which is found throughout the coast, cf. Dean Channel. George Vancouver used both terms in his naming of inlets, Hood Canal for example. The placement of the international boundary in the Portland Canal was a major issue during the negotiations over the Alaska boundary dispute, which heated up as a result of the Klondike Gold Rush and ended by arbitration in 1903. Together with Pearse Canal and Tongass Passage, the Portland Canal is defined by the Alaska Boundary Settlement (the Hay-Herbert Treaty) as part of Portland Channel (Canal), a term used as forming the marine boundary in the Anglo-Russian Treaty of 1825 but which was undefined at the time.

Illustrations

Worked examples

Example 1 — a first encounter with Portland Canal

Start with the simplest possible case. Write down what Portland Canal 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 Portland Canal 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 Portland Canal 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 Portland Canal

In research: Portland Canal 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 Portland Canal 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: Portland Canal is common in secondary-school and first-year university syllabi. It links to neighbouring topics Bodies of water of Ketchikan Gateway Borough, Alaska, Bodies of water of Prince of Wales–Hyder Census Area, Alaska, Borders of British Columbia, so understanding it makes those chapters shorter.
In everyday life: Look for Portland Canal 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.

Affiliate

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

How to study Portland Canal in 20 minutes

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

Frequently asked questions

What is Portland Canal in simple terms?

Portland Canal is an arm of Portland Inlet, one of the principal inlets of the British Columbia Coast. It is approximately 114 km (71 mi) long.

Why does Portland Canal 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 Portland Canal?

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 Portland Canal.