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Mountain Streams and V-Shaped Valleys

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Questions and Answers

How is discharge calculated?

By dividing the width of the stream by its depth

By adding the width of the stream to its depth

By multiplying the width of the stream by its depth

By multiplying the cross-sectional area of the stream by its average velocity (correct)

What happens to the velocity if the cross-sectional area of a stream increases?

Velocity decreases (correct)

Velocity increases

The relationship between velocity and area is unpredictable

Velocity remains the same

What are floodplains?

Flat areas adjacent to river channels that are occasionally flooded (correct)

Regions with excess water drainage

Areas that are never flooded

Mountainous regions prone to landslides

How are oxbow lakes formed?

When a meander loop is cut off from the main channel Signup and view all the answers

What is a drainage basin?

The entire land area that contributes water to a specific stream or river system Signup and view all the answers

What does recurrence interval refer to in relation to floods?

The average time between floods of a certain magnitude Signup and view all the answers

What is one factor contributing to the formation of deep, V-shaped valleys in mountain streams?

Limited vegetation exposing rock to erosive force Signup and view all the answers

What does the angle of repose refer to in relation to loose material on a slope?

The steepest angle without material collapsing Signup and view all the answers

What happens to the gradient (slope) of a stream as it flows downstream?

It decreases, resulting in a slower flow rate Signup and view all the answers

How does the channel width change as a stream flows downstream?

It increases as downcutting decreases and flow rate slows Signup and view all the answers

What is lateral erosion in the context of stream dynamics?

Erosion that widens the valley by removing material from its sides Signup and view all the answers

How does limited vegetation at high altitudes impact stream dynamics?

It minimizes soil stabilization and exposes rock to erosive forces Signup and view all the answers