Columbia River Quiz
Watershed, major tributaries, hydropower dams, Pacific outlet (10 questions).
Columbia River Quiz: Quick Study Notes
The Columbia River is the largest river in the Pacific Northwest region of North America. Spanning over 1,243 miles (2,000 kilometers) from its source in the Rocky Mountains of British Columbia to its mouth at the Pacific Ocean, it plays a vital role in the geography, economy, and ecology of the region. This quiz explores key aspects of this magnificent river, including its vast watershed, major tributaries, numerous hydropower dams, and its powerful outlet to the sea.
Key Concepts
Covers approximately 258,000 square miles across seven U.S. states and one Canadian province.
Key rivers include the Snake River (largest), Willamette River, Kootenay River, and Spokane River.
Home to over 400 dams, including major producers like Grand Coulee and Bonneville, generating immense clean energy.
Empties into the Pacific Ocean, forming a significant portion of the Washington-Oregon border, known for the challenging Columbia Bar.
Key Takeaways
- Originates in the Canadian Rocky Mountains, specifically Columbia Lake in British Columbia.
- It is the second-largest river by discharge volume in North America, after the Mississippi.
- Its vast watershed supports diverse ecosystems and is crucial for agriculture and human settlement.
- The Snake River is the largest tributary, significantly contributing to the Columbia’s overall flow.
- The river system boasts over 400 dams, making it one of the most developed rivers for hydroelectric power.
- Grand Coulee Dam is the largest dam on the river, renowned for its power generation and irrigation capabilities.
- Dam construction has heavily impacted salmon and other anadromous fish migration, leading to conservation efforts.
- Near its mouth, the Columbia River defines much of the border between the U.S. states of Washington and Oregon.
- The Columbia Bar at its mouth is a notoriously difficult and dangerous stretch of water for navigation.
Frequently Asked Questions
What is the source of the Columbia River?
The Columbia River originates in Columbia Lake, located in the Rocky Mountain Trench of British Columbia, Canada.
Which states and province are part of the Columbia River watershed?
The Columbia River watershed spans parts of seven U.S. states (Washington, Oregon, Idaho, Montana, Wyoming, Utah, Nevada) and one Canadian province (British Columbia).
What is the purpose of the many dams on the Columbia River?
The dams on the Columbia River system serve multiple purposes, primarily hydroelectric power generation, irrigation for agriculture, flood control, and navigation.
How has the Columbia River impacted salmon populations?
The construction of numerous dams has significantly impacted salmon populations by blocking their migratory paths to spawning grounds, altering water temperatures, and changing habitat. Fish ladders and other mitigation efforts are in place.
Where does the Columbia River empty into the ocean?
The Columbia River empties into the Pacific Ocean at the border of Washington and Oregon, specifically at a location known for the Columbia Bar.
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