GeographyGCSE UK river landscapes30 min★★★ difficulty

River processes and landforms down the long profile

One river, three stages, a predictable set of landforms. Learn the sequence and you can explain any labelled diagram the exam prints.

Lesson overview

What you'll learn in this lesson

Explain fluvial processes, landforms along the long profile, flood risk and management strategies.

Key learning points

• Processes
• Upper course landforms
• Middle and lower course landforms
• Hydrographs and flood risk

This lesson at a glance

30 minutes
20 parts to scroll through
4 quick checks
Marked quiz at the end
Gentle pace: short sittings with pauses

Words to know

fluvialprocesseslandformsprofilemanagement

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Visual introduction

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River processes and landforms down the long profile

One river, three stages, a predictable set of landforms. Learn the sequence and you can explain any labelled diagram the exam prints.

In a nutshell

Explain fluvial processes, landforms along the long profile, flood risk and management strategies.

Learning cycle

Part 2 of 20

Learning cycle 1 of 2

Part 1 · Processes

A short piece of teaching, then a check to make sure it has landed.

Explore the idea

Part 3 of 20

Learn

Processes

Erosion works by hydraulic action, abrasion, attrition and solution; transport by traction, saltation, suspension and solution; deposition occurs when velocity falls. Vertical erosion dominates upstream, lateral erosion downstream — the single most useful sentence in this unit.

Reset break

Part 4 of 20

Pause

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Stretch, get a drink, look out of the window. There is no timer and nothing is counting down — your place is saved, so you can come back in five minutes or tomorrow.

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Explore the idea

Part 5 of 20

Learn

Upper course landforms

Interlocking spurs, V-shaped valleys, waterfalls and gorges. A waterfall retreats upstream as soft rock is undercut beneath a hard cap, the overhang collapses into a plunge pool, and the repeated process leaves a gorge behind it.

Quick check

Part 6 of 20

Quick check

Which process dominates in the upper course?

Give me a hint

Quick check

Part 7 of 20

Quick check

What forms a gorge below a waterfall?

Give me a hint

Reset break

Part 8 of 20

Pause

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Stretch, get a drink, look out of the window. There is no timer and nothing is counting down — your place is saved, so you can come back in five minutes or tomorrow.

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Learning cycle

Part 9 of 20

Learning cycle 2 of 2

Part 2 · Middle and lower course landforms

A short piece of teaching, then a check to make sure it has landed.

Explore the idea

Part 10 of 20

Learn

Middle and lower course landforms

Meanders form where flow is fastest on the outside bend, eroding a river cliff, while slower water on the inside deposits a slip-off slope. Continued erosion narrows the neck until a flood cuts through, leaving an oxbow lake. Floodplains and levées are built by repeated overbank deposition, coarsest material dropping first at the channel edge.

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Part 11 of 20

Learn

Hydrographs and flood risk

Lag time is the gap between peak rainfall and peak discharge. Impermeable geology, steep slopes, saturated or frozen ground, deforestation and urbanisation all shorten lag time and raise the peak — the standard structure for any flood-risk answer.

Reset break

Part 12 of 20

Pause

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Stretch, get a drink, look out of the window. There is no timer and nothing is counting down — your place is saved, so you can come back in five minutes or tomorrow.

Stop here for now

Quick check

Part 13 of 20

Quick check

Which factor shortens lag time?

Give me a hint

Quick check

Part 14 of 20

Quick check

Why is the coarsest material found on levées?

Give me a hint

Explore the idea

Part 15 of 20

Worked example

Model answer: 'Explain the formation of an oxbow lake' (4 marks)

On a meander, the fastest flow on the outside of the bend erodes the bank by hydraulic action and abrasion, forming a river cliff, while reduced velocity on the inside deposits sediment as a slip-off slope. Over time this erosion narrows the neck of land between two bends. During a flood the river has enough energy to cut straight across the neck, taking the shorter route. Deposition then seals the ends of the old meander, leaving a crescent-shaped oxbow lake cut off from the main channel.

Reset break

Part 16 of 20

Pause

That's sitting 4 of 5 done

Stretch, get a drink, look out of the window. There is no timer and nothing is counting down — your place is saved, so you can come back in five minutes or tomorrow.

Stop here for now

Challenge round

Part 17 of 20

Game · Sort it

Which of these are true?

Drag each card into the right column. Tap a card first if dragging is fiddly.

True

Not true

Challenge round

Part 18 of 20

Game · Recall cards

Which process dominates in the upper course?

Card 1 of 4

Mastery quiz

Part 19 of 20

Marked quiz

End of lesson quiz: River processes and landforms down the long profile

4 questions, marked with the reasoning shown. No timer.

1. Which process dominates in the upper course?
2. What forms a gorge below a waterfall?
3. Which factor shortens lag time?
4. Why is the coarsest material found on levées?

Lesson round-up

Part 20 of 20

Lesson round-up

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