science

Water resource region

Water resource region 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 Water resource region rather than just read about it. In short: A water resource region is the first level of classification used by the United States Geological Survey to divide and sub-divide the United States into successively smaller hydrologic units as part of the U.S. hydrologic unit system. This first level of classification divides the United States into 21 major geographic areas, or regions.

Key takeaways

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

Reference excerpt

A water resource region is the first level of classification used by the United States Geological Survey to divide and sub-divide the United States into successively smaller hydrologic units as part of the U.S. hydrologic unit system. This first level of classification divides the United States into 21 major geographic areas, or regions. These geographic areas contain either the drainage area of a major river, or the combined drainage areas of a series of rivers.

List of water resource regions

External links Kapinos, F. Paul; Knapp, George L.; Seaber, Paul R. (2016-12-07) [1987]. "Hydrologic Unit Maps: U.S. Geological Survey, Water Supply Paper 2294". pubs.usgs.gov. USGS. Retrieved 2018-08-14. This article incorporates text from this source, which is in the public domain. Taylor, O. James (1978). Summary appraisals of the nation's ground-water resources – Missouri basin region (PDF) (Report). U.S. Government Printing Office. doi:10.3133/pp813q. Zurawski, Ann (1978). Summary appraisals of the nation's ground-water resources – Tennessee region (PDF) (Report). U.S. Government Printing Office. doi:10.3133/pp813l. Sinnott, Allen; Cushing, Elliot Morse (1978). Summary appraisals of the nation's ground-water resources – Mid-Atlantic region (PDF) (Report). U.S. Government Printing Office. doi:10.3133/pp813i.

References

Illustrations

Water resource region: The 21 first-level 2-digit region hydrologic unit boundaries. — The 21 first-level 2-digit region hydrologic unit boundaries.

Worked examples

Example 1 — a first encounter with Water resource region

Start with the simplest possible case. Write down what Water resource region 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 Water resource region 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 Water resource region 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 Water resource region

In research: Water resource region 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 Water resource region 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: Water resource region is common in secondary-school and first-year university syllabi. It links to neighbouring topics Drainage basins, Lists of drainage basins, Lists of rivers of the United States by state, so understanding it makes those chapters shorter.
In everyday life: Look for Water resource region 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 “Water resource region” →

Affiliate

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

How to study Water resource region in 20 minutes

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

Frequently asked questions

What is Water resource region in simple terms?

Why does Water resource region 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 Water resource region?

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 Water resource region.