The Cross Profile of a River Flashcards

[Click to shuffle]

What is a channel cross profile?
Click to View the Answer
Click to View the Question

A channel cross-profile is a cross-section of only the river channel.

Find out more about the cross profile of a river.

What is a channel cross profile?
What is a valley cross profile?
Click to View the Answer
Click to View the Question

A valley cross-profile includes the channel, the valley floor and the sides of the valley.

Find out more about the cross profile of a river.

What is a valley cross profile?
How does the valley cross-section change downstream?
Click to View the Answer
Click to View the Question

In the upper course, the valley cross-profile is narrow and steep-sided. The river takes up most of the valley floor. In the middle course, the valley becomes wider due to lateral erosion. By the lower course, the valley is almost flat, consisting of a wide flood plain.

Find out more about the cross profile of a river.

How does the valley cross-section change downstream?
Why does the channel cross-section of a river change downstream?
Click to View the Answer
Click to View the Question

In the upper course, the river erodes its bed by hydraulic action and abrasion. As the river flows downstream it is joined by tributaries, increasing the volume of water, velocity and therefore its erosive power. This enables it to cut a deeper channel as it flows downstream.

Downstream, the channel becomes wider as the gradient becomes more gentle leading to less vertical erosion. By the middle course of the river lateral erosion becomes the dominant type of erosion. The channel becomes wide because of lateral erosion.

Find out more about the cross profile of a river.

Why does the channel cross-section of a river change downstream?
What is the cross profile of a river?
Click to View the Answer
Click to View the Question

River cross profiles show you a cross-section, taken sideways, of a river’s channel and/or valley at certain points in the river’s course.

Find out more about the cross profile of a river.

What is the cross profile of a river?




Request a question

4 + 0 = ?