AQA GCSE Geography Paper 1, June 2025: Question 4

15 marks · Medium difficulty · Extended Response

Answer questions on river processes, hydrograph analysis, waterfall formation, and the costs and benefits of soft engineering flood management strategies.

Practise this question

Question

Question 4 from an exam paper on river landscapes. Sub-question 04.1 asks for the transportation process where pebbles bounce along a river bed. Figure 14 displays a flood hydrograph plotting rainfall in mm as bar columns and river discharge in cumecs for River A (urban) and River B (woodland) across time from 11:45 to 20:15. Sub-question 04.2 requires plotting a data point at 20:00 with 20 cumecs for River B. 04.3 asks for the lag time between peak rainfall and peak discharge for River A. 04.4 asks to describe two differences in discharge between River A and River B. 04.5 asks to explain waterfall formation using labelled diagrams. Figure 15 displays two photographs of soft engineering: 'Tree planting' on hillsides and an electronic 'Flood warning' sign. Sub-question 04.6 asks to discuss the costs and benefits of using soft engineering to manage river flooding.
Question text

04.1 Which term is used to describe the transportation process where pebbles are

bounced along a river bed?

Shade one circle only.

[1 mark]

A Saltation

B Solution

C Suspension

D Traction

Figure 14 is a flood hydrograph for two different rivers after the same storm.

04.2 Complete the hydrograph for River B on Figure 14 using the following data.

[1 mark]

Time 20:00

Discharge 20 cumecs

Figure 14

120 120

Peak discharge

100 100

80 80

Peak discharge

60 60

Peak rainfall

40 40

20 20

Time

Key

Rainfall (mm) Discharge for River A (urban) Discharge for River B (woodland)

04.3 What is the time difference between peak rainfall and peak discharge for River A?

Shade one circle only.

[1 mark]

(26)

A 1 hour

B 2 hours

C 3 hours

D 4 hours

04.4 Using Figure 14, describe two differences in the river discharge between River A

and River B.

[2 marks]

1 …

2 …

04.5 Explain how a waterfall is formed.

Use one or more labelled diagrams.

[4 marks]

(27) …

Study Figure 15, photographs of soft engineering strategies used to manage

river flooding.

Figure 15

Tree planting Flood warning

04.6 Discuss the costs and benefits of using soft engineering to manage river flooding.

Use Figure 15 and your own understanding.

[6 marks]

(28)

Extra space …

End of Question 4

Question 5 Glacial landscapes in the UK

Mark scheme

Show the mark scheme Mark scheme for Question 4. 04.1 identifies A (Saltation) for 1 mark. 04.2 credits accurately plotting (20:00, 20 cumecs) and completing the line for River B. 04.3 gives B (2 hours) for 1 mark. 04.4 outlines comparative points between River A and B (peak discharge, lag time, steepness of limbs). 04.5 provides a two-level rubric (1-4 marks) detailing waterfall processes (hard/soft rock, hydraulic action, abrasion, plunge pool, undercutting, collapse, and gorge retreat) accompanied by an illustrative diagram. 04.6 provides a three-level rubric (1-6 marks) evaluating costs and benefits of soft engineering strategies including tree planting, flood warnings, floodplain zoning, and river restoration.

Total

Qu Pt Marking guidance

marks

04 1 Which term is used to describe the transportation process where pebbles 1

are bounced along a river bed?

A Saltation

No credit if two or more statements are shaded.

AO1 – 1 mark

04 2 Complete the hydrograph for River B on Figure 14 using the following 1

data.

Time 20:00 for River B should be accurately marked at 20 cumecs and the

student should join the points to complete the line as shown above.

AO4 – 1 mark

04 3 What is the time difference between peak rainfall and peak discharge for 1

River A?

B 2 hours

No credit if two or more statements are shaded.– – 8035/1 –

AO4 – 1 mark

04 4 Using Figure 14, describe two differences in the river discharge between 2

River A and River B.

2x1

The peak discharge for River A is higher/nearly twice as much (as that for

River B) (1)

The discharge for River A is higher (1)

River B has a higher discharge than River A from 19:30 (1).

The peak discharge occurs sooner after peak rainfall for River A (than for River

B) / there is a shorter lag time for River A (1).

The discharge for River A has a steeper rise and fall / rising and falling limb

(than that of River B) (1).

River A rises continuously to peak discharge after peak rainfall whereas River

B plateaus (at 16:00–16:30) before rising again (1).

The discharge for River B takes longer to change after the rainfall event (than

that for River A) (1).

The discharge for River B has not returned to its normal flow on the hydrograph

unlike that of River A (1).

No credit for explanation of the two hydrographs.

Must make some (implied) comparative reference.

Only 1 mark for two separate statements about the same trend.–– 8035/1 –

AO4 – 2 marks

04 5 Explain how a waterfall is formed. 4

Use one or more labelled diagrams.

Level Marks Description

2 3–4 AO1 – Demonstrates accurate knowledge about the

(Clear) formation of waterfall and river erosion processes.

AO2 – Shows a clear geographical understanding of

the effect(s) of river erosion on waterfall formation.

1 1–2 AO1 – Demonstrates basic knowledge about the

(Basic) formation of waterfall and river erosion processes.

AO2 – Shows a limited geographical understanding of

the effect(s) of river erosion on waterfall formation.

0 No relevant content.

• Level 2 (clear) responses are likely to contain linked statements showing

understanding of river erosion and the formation of waterfalls. Appropriate

geographical terminology.

• Level 1 (basic) responses will comprise simple ideas with limited or partial

sequence and little reference to the processes involved. Limited

geographical terminology.

• Max lower L2 if diagram is not used.

• Credit full marks at L2 if annotated diagram clearly shows formation.

Indicative content

• The command is ‘explain’, so responses should provide a reasoned account

of the formation of a waterfall.

• The river may flow over an area of hard (cap) rock with softer more easily

eroded rock underneath. Over time the softer rock is worn away more

rapidly by processes of hydraulic action and abrasion, creating a waterfall.

The water hits the bottom of the falls with great force. This erodes a deep

hole called a plunge pool. The softer underlying rock is eroded and

weakened. The softer layer collapses into the plunge pool, undercutting the

hard cap rock. The cap rock cracks and then collapses.

• Gradually the waterfall retreats upstream, leaving behind a steep sided

gorge. Every time the overhanging cap rock breaks off, the gorge retreats

further and grows longer. There is turbulent fast flowing water in the gorge.

Note that gorge formation is not needed to achieve max marks.

• Allow other explanations such as knick points along the river caused by

changing sea levels. Waterfalls are also found where hanging valleys form

in glacial landscapes.

No credit for identification of processes unless related to waterfall formation

Labelled and annotated diagram(s) can substitute for written text, showing the

sequence of changes and processes involved. (See next page.)––8035/1 –

The diagram above would be awarded 4 marks.

AO1 – 2 marks – – 8035/1 –

AO2 – 2 marks

04 6 Discuss the costs and benefits of using soft engineering to manage river 6

flooding. Use Figure 15 and your own understanding.

Level Marks Description

3 5–6 AO2 – Shows thorough geographical understanding

(Detailed) of the costs and benefits of using soft engineering.

AO3 – Demonstrates thorough application of

knowledge and understanding in discussing the soft

engineering strategy/ies shown in Figure 15.

2 3–4 AO2 – Shows clear geographical understanding of

(Clear) the costs and/or benefits of using soft engineering.

AO3 – Demonstrates reasonable application of

knowledge and understanding in discussing the

strategy(ies) shown in Figure 15.

1 1–2 AO2 – Shows limited geographical understanding of

(Basic) the costs and/or benefits of using soft engineering.

AO3 – Demonstrates limited application of

knowledge and understanding in discussing the

strategy(ies) shown in Figure 15.

0 No relevant content

• Level 3 (detailed) responses will be developed responses with reference to

both the costs and benefits of soft engineering strategy/ies. Detailed use of

Figure 15 and own understanding. Appropriate terminology will be used.

• Level 2 (clear) responses will show some reference to costs and/or

benefits of soft engineering strategy(ies). Answers likely to make reference

to Figure 15 and/or own understanding. Some geographical terminology

evident.

• Level 1 (basic) responses will be simple statements. May consist of listed

38 points or random statements about soft engineering strategy(ies).

• Max L2 for answer that does not refer to Figure 15.

Indicative content

• The command is ‘discuss’, so responses should provide a reasoned account

of the costs and benefits of different types of soft engineering. At the highest

level there may be a discussion of the balance of costs and benefits

• Understanding of soft engineering. Soft engineering schemes are set up to

work with the natural processes along the river to reduce the effects of

flooding. They aim to slow down the movement of water into the river

channel and do not involve building artificial structures. Soft engineering

aims to work with the environment and is more ecologically sensitive.

• Figure 15 shows tree planting and flood warnings. Tree planting in a

drainage basin increases interception and storage and reduces surface run

off. This increases lag time and reduces a river’s discharge and so makes it

less likely to flood. It creates new habitats for animals and improves water

quality by filtering pollutants out of rainwater. Tree planting is relatively

cheap in the long-term but it can take years for the trees to mature and start––8035/1–

having an effect. Tree planting can also restrict other types of land use.

• Flood warnings help people to take action in advance of flooding.

Three levels of warning are used: flood watch, flood warning and severe 39

flood warning. The strategy is relatively cheap and can reduce loss of life

since people are given time to evacuate areas at risk. Flood warnings can

also reduce damage to belongings resulting in fewer insurance claims and

emotional distress. However, flood warnings do not actually prevent or

reduce the risk of the river flooding and not everyone may be alerted by

them or in time.

• Credit other soft engineering strategies. For example:

o Floodplain zoning is a strategy where proximity to river determines land

use. Land use close to river may be used for animal grazing. Land

furthest from the river used for ‘expensive’ land use, such as housing and

industry. The strategy is relatively cheap and does not interfere with

natural flows and river processes. Less damage is caused, leading to

fewer insurance claims. However, it is not always possible to change

existing land uses and planning decisions may not always be popular.

o River restoration involves restoring a river that has undergone hard

engineering back to its original course. If the land is no longer valuable,

river restoration can help reduce the risk of flooding downstream by using

the natural processes of the river. This can be an expensive strategy.

AO2 – 3 marks

AO3 – 3 marks

How to answer it

River Landscapes & Flood Management (AQA GCSE)

📋 WHAT THIS QUESTION TESTS

This question assesses your core knowledge and analytical skills on River Landscapes in the UK:

  • Fluvial Transportation Processes: Recognising saltation, traction, suspension, and solution.
  • Graphical & Numerical Skills: Plotting hydrograph points accurately and calculating lag time (peak rainfall to peak discharge).
  • Data Interpretation: Directly comparing hydrograph characteristics (peak discharge, lag time, limb steepness) between urban and forested catchments.
  • Landform Explanations: Providing a step-by-step erosional sequence for waterfall and gorge formation, fully supported with labelled diagrams.
  • Resource Evaluation (Discuss 6-marker): Balanced appraisal of the economic, social, and environmental costs and benefits of soft engineering strategies (afforestation, flood warnings, floodplain zoning).
Question 04.1 • 1 Mark

Fluvial Bedload Transportation

Identify the term for pebbles bouncing along the river bed

✅ Correct Answer

A: Saltation

Award 1 mark for shading option A only. No credit if two or more options are shaded.

💡 Four Transportation Types

  • Traction: Large boulders rolled along the river bed.
  • Saltation: Small pebbles bounced along the river bed.
  • Suspension: Fine light silt and clay carried within the water flow.
  • Solution: Minerals dissolved into the water (invisible load).
Question 04.2 • 1 Mark

Completing a Flood Hydrograph

Plotting River B's final discharge point

✅ Correct Plotting

  • Locate 20:00 on the horizontal (Time) axis.
  • Plot a point exactly at 20 cumecs on the right-hand vertical axis.
  • Use a ruler to join this point with a continuous line from the previous plotted value at 19:30 to complete the falling limb.

❌ Common Errors

  • Wrong vertical axis: Reading from the left axis (rainfall in mm) instead of the right axis (discharge in cumecs).
  • Incomplete line: Plotting the point but forgetting to join it with the preceding line.
  • Dashed line error: Drawing a dashed line (River A style) instead of a solid line (River B style).
Question 04.3 • 1 Mark

Calculating Hydrograph Lag Time

Time difference between peak rainfall and peak discharge for River A

📐 Step-by-Step Calculation

  1. Find Peak Rainfall: Look at the rainfall bar chart. Highest bar is at 15:30 (30 mm).
  2. Find Peak Discharge (River A): Look at the dashed line. Highest peak reaches 100 cumecs at 17:30.
  3. Calculate the difference:
    17:30 - 15:30 = 2 hours

✅ Correct Answer

B: 2 hours

Lag time is specifically the interval between maximum rainfall intensity and maximum river discharge.

Question 04.4 • 2 Marks

Comparative Discharge Analysis

Describe two differences in the river discharge between River A and River B

✅ Acceptable Comparative Points (Any 2)

  • Peak Discharge: River A has a much higher peak discharge (~100 cumecs) than River B (~55 cumecs) / nearly double.
  • Timing of Peak: River A reaches peak discharge earlier (17:30) than River B (18:30) / River A has a shorter lag time.
  • Limb Steepness: River A has a steeper rising/falling limb than River B.
  • Post-19:30 Discharge: River B has a higher discharge than River A after 19:30.
  • Baseflow Return: River A returns closer to its starting baseflow, whereas River B remains elevated.

🧠 Exam Technique: Direct Comparisons

  • Use comparative connectives like "whereas", "higher than", or "sooner than".
  • Do NOT explain reasons: This question says describe. Explaining impermeable tarmac or tree interception gets 0 marks.
  • Do not write two sentences that simply describe the same point twice (e.g. saying River A is higher, and then saying River B is lower).
Question 04.5 • 4 Marks

Landform Formation: Waterfalls

Explain how a waterfall is formed (Level 2: 3–4 marks)

📐 Diagram Requirement (Essential for 4/4 marks):

To score the top mark band (Level 2), you must draw and label a diagram. Your diagram must show:

  • Layering: Resistant hard rock (cap rock) overlying less resistant soft rock.
  • Erosion: Undercutting of soft rock via hydraulic action and abrasion.
  • Features: Plunge pool at the base with swirling boulders; unsupported rock overhang.
  • Evolution: Overhang collapsing under gravity; gorge of recession left as the waterfall retreats upstream.

💡 Sequential Model Answer

  1. A river flows over alternating horizontal bands of resistant hard rock (e.g. whinstone) overlying weaker soft rock (e.g. sandstone/shale).
  2. The soft rock erodes faster via hydraulic action (water force compressing air into cracks) and abrasion (rocks scouring the bed).
  3. A step forms. Water plunges over the ledge, carving out a deep plunge pool at the base.
  4. Undercutting leaves an unsupported overhang of hard rock, which eventually collapses under gravity into the plunge pool.
  5. This sequence repeats over time, causing the waterfall to retreat upstream and leaving a steep-sided gorge.

🧠 Examiner Insight

Mark Scheme Rule: Maximum lower Level 2 (3 marks) if a diagram is missing! You cannot achieve 4/4 without at least one clear, labelled diagram. Fully annotated diagrams can achieve full marks on their own.

Common Pitfalls:

  • Just naming erosion types without explaining where and how they act.
  • Forgetting to explain that the waterfall retreats upstream to leave a gorge.
Question 04.6 • 6 Marks

Discussing Soft Engineering

Discuss the costs and benefits of using soft engineering to manage river flooding

💡 Strategy 1: Tree Planting (Afforestation)

  • Benefits: Intercepts precipitation, increases root uptake and evapotranspiration; reduces surface runoff and prolongs lag time; creates wildlife habitats; extracts carbon from the atmosphere.
  • Costs/Limitations: Takes many years for saplings to grow dense enough to become fully effective; restricts agricultural and building land use; cannot stop extreme, long-duration rainfall events.

💡 Strategy 2: Flood Warnings & Preparation

  • Benefits: Low-cost; gives communities and emergency services advance warning to deploy sandbags, move valuables upstairs, and safely evacuate, reducing injury and loss of life.
  • Costs/Limitations: Does not physically stop water from flooding homes and businesses; relies on everyone receiving and understanding alerts; false alarms can cause complacency.

🧠 Level 3 Mark Scheme Breakdown (5–6 Marks)

  • Both Costs and Benefits: Must cover positive impacts alongside weaknesses, financial costs, or trade-offs.
  • Use of Figure 15: Must directly refer to the visual resources provided (afforestation on slopes / automated road hazard signs).
  • Own Knowledge: Adding additional strategies like floodplain zoning or river restoration elevates your answer into Level 3.
  • Balanced Evaluation: Soft engineering is ecologically sound and cheaper than hard engineering (e.g. dams/embankments), but does not physically hold back peak flood discharges.

❌ Common Misconceptions

  • Ignoring the figure: Omitting direct reference to Figure 15 automatically caps the answer at Level 2 (maximum 4 marks).
  • Confusing hard vs soft: Discussing concrete sea walls, dams, or artificial levees. These are hard engineering methods!
  • One-sided answers: Writing only positive benefits without discussing costs or limitations will prevent you reaching Level 3.

Topics

3.1 Living with the physical environment · 3.4 Geographical skills · 3.1.3 Section C: Physical landscapes in the UK · 3.4.2 Graphical skills · 3.4.3 Numerical skills

Question and mark scheme from the AQA GCSE Geography examination, Paper 1, June 2025. QuestionVault is an independent revision resource; questions remain the copyright of the awarding body.