dam
A dam is a barrier constructed across a river or stream to hold back water. It is typically built to create a reservoir for water supply, flood control, or hydroelectric power generation.
A dam is a constructed barrier across a river used to control water flow for purposes like storage, power, or flood prevention.
Word in 30 Seconds
- A barrier that stops or controls the flow of water.
- Used for water storage, power, and flood control.
- A major engineering structure with environmental impacts.
Summary
A dam is a constructed barrier across a river used to control water flow for purposes like storage, power, or flood prevention.
- A barrier that stops or controls the flow of water.
- Used for water storage, power, and flood control.
- A major engineering structure with environmental impacts.
Visualize the water barrier
Think of a dam as a wall holding back a large amount of water, creating a lake or reservoir behind it.
Distinguish from 'damn'
Be careful not to confuse 'dam' (the water barrier) with 'damn' (an interjection or mild curse word), which has a different spelling and meaning.
Human control over nature
Dams represent a significant human effort to control and harness natural resources, often involving large-scale engineering and societal planning.
Examples
4 of 4The Hoover Dam is a major tourist attraction in the United States.
Construction of the new dam will require significant environmental impact assessments.
They built a small dam in the creek to make a swimming hole.
The study analyzed the effects of the upstream dam on downstream sediment deposition.
Word Family
Memory Tip
Imagine a large 'D' blocking a river, and you add an 'am' behind it to remember the spelling of the structure that holds back water.
**Overview**
A dam is an artificial barrier designed to obstruct the flow of water, usually in a river or stream. The primary purpose of a dam is to control water, either by storing it in a reservoir behind the barrier or by diverting it for other uses. Dams are significant engineering structures, often requiring extensive planning, resources, and labor to construct. They can vary greatly in size, from small structures built by individuals to massive projects that reshape entire landscapes.
**Usage Patterns**
The word 'dam' is most commonly used as a noun to refer to the physical structure itself. It can also be used metaphorically. In informal speech, 'damn' (spelled with an 'n') is used as an interjection or mild curse, but this is a different word with a different spelling and meaning.
**Common Contexts**: Dams are frequently discussed in contexts related to:
- Engineering and Construction: Describing the building process, materials used (concrete, earth), and structural integrity.
- Environmental Science: Discussing the impact of dams on river ecosystems, fish migration, sediment flow, and water quality.
- Water Management: Explaining their role in irrigation, municipal water supply, and drought mitigation.
- Energy Production: Detailing how hydroelectric dams generate electricity.
- Disaster Preparedness: Mentioning flood control and the potential risks associated with dam failures.
**Similar Words Comparison**:
- Barrier: A general term for anything that obstructs or separates. A dam is a specific type of barrier.
- Levee: An embankment built along the banks of a river to prevent flooding. Levees typically run parallel to the water, whereas dams cross it.
- Weir: A low dam built across a river to raise the water level or control its flow. Weirs are generally smaller and simpler than dams.
Usage Notes
The word 'dam' is primarily used as a noun. Ensure correct spelling, especially when distinguishing it from the word 'damn'. It is a common term in discussions about infrastructure, environment, and natural resources.
Common Mistakes
A common mistake is misspelling 'dam' as 'damn'. Remember that 'dam' refers to the physical structure, while 'damn' is an exclamation or intensifier.
Memory Tip
Imagine a large 'D' blocking a river, and you add an 'am' behind it to remember the spelling of the structure that holds back water.
Word Origin
The word 'dam' likely originated from the Middle Dutch word 'damme' or the Old French 'dam', both referring to a barrier or dike.
Cultural Context
Dams are symbols of human ingenuity and control over nature, but they also raise complex questions about environmental responsibility and the allocation of resources.
Examples
The Hoover Dam is a major tourist attraction in the United States.
everydayConstruction of the new dam will require significant environmental impact assessments.
formalThey built a small dam in the creek to make a swimming hole.
informalThe study analyzed the effects of the upstream dam on downstream sediment deposition.
academicWord Family
Common Collocations
Common Phrases
build a dam
the Three Gorges Dam
dam the river
Often Confused With
'Dam' is a noun referring to a barrier that holds back water. 'Damn' is an interjection used to express anger or frustration, or as an adjective/adverb meaning 'damned'.
Grammar Patterns
Visualize the water barrier
Think of a dam as a wall holding back a large amount of water, creating a lake or reservoir behind it.
Distinguish from 'damn'
Be careful not to confuse 'dam' (the water barrier) with 'damn' (an interjection or mild curse word), which has a different spelling and meaning.
Human control over nature
Dams represent a significant human effort to control and harness natural resources, often involving large-scale engineering and societal planning.
Test Yourself
Complete the sentence with the correct word.
The engineers are planning to build a ___ across the river to generate electricity.
A dam is a structure built across a river for purposes like generating electricity.
Choose the best option to complete the sentence.
The water level behind the ___ has risen significantly, creating a large reservoir.
A dam creates a reservoir by holding back water.
Arrange the words to form a grammatically correct sentence.
flood / control / the / dam / helps / water
This sentence correctly uses 'dam' as the subject and 'control the water flood' as the object/action.
Score: /3
Frequently Asked Questions
4 questionsThe main purposes of a dam are to store water in a reservoir, control floods, generate hydroelectric power, and supply water for irrigation or domestic use.
No, dams can be made from various materials, including concrete, earth (earth-fill dams), rock (rock-fill dams), or a combination of materials.
A dam is built across a river to hold back water and create a reservoir, while a levee is built along the sides of a river to prevent it from overflowing its banks.
Yes, dams can significantly impact the environment by altering river flow, affecting fish migration, changing water temperature and quality, and trapping sediment.
