Theme 2: Key Idea 2.2 Shaping the landscape - rivers and river management — Eduqas GCSE Geography B
Teaching note based on the EDUQAS specification.
Test yourself on Theme 2: Key Idea 2.2 Shaping the landscape - rivers and river management with EDUQAS GCSE practice questions.
A week of Premium from your first lesson · Then the free plan continues · No card, no charge
Theme 2: Key Idea 2.2 Shaping the landscape - rivers and river management explained
This criterion covers the drainage basin as a system of stores and flows.
Read the full explanation
Learn the processes: interception (rain caught by leaves), transpiration (water lost as vapour from plants), infiltration (water soaking into soil), surface run-off (water flowing over the ground) and throughflow (water moving laterally through soil). Climate, geology and human activity change these. Impermeable rock and saturated soil raise surface run-off; permeable rock and dense vegetation increase infiltration and storage. Removing vegetation reduces interception and transpiration, so more water reaches the river quickly; urbanisation with tarmac and drains does the same, raising flood peaks. Climate creates seasonal variation in discharge, and the annual regime describes the typical pattern of high and low flow across the year.
Your focus
- Describe the processes of interception, transpiration, infiltration, surface run-off and throughflow.
- Explain how vegetation change and urbanisation alter flows and stores of water.
- Interpret a hydrograph to show the relationship between climate and discharge.
Theme 2: Key Idea 2.2 Shaping the landscape - rivers and river management exam tips
Marking Points
- Defines interception as rainfall caught and held by vegetation before reaching the ground.
- Distinguishes infiltration, the downward movement of water into soil, from throughflow, the lateral movement of water through soil.
- Explains that removing vegetation reduces interception and transpiration, increasing surface run-off and raising flood peaks.
- Explains that urbanisation creates impermeable surfaces and drains, so water reaches the river faster with a shorter lag time.
- States that the annual regime describes the typical seasonal pattern of discharge across a year.
- Reads a hydrograph to relate a rainfall event to the resulting discharge peak and lag time.
Examiner Tips
- 💡Learn each process with a one-line definition and a land-use example that changes it.
- 💡When reading a hydrograph, name the peak discharge and the lag time explicitly.
- 💡Link every human change to a named process, such as deforestation reducing interception.
- 💡Use the term 'annual regime' precisely when describing seasonal discharge patterns.
Common Mistakes
- Confuses infiltration with throughflow; infiltration moves water downward into soil, whereas throughflow moves it sideways through soil.
- Treats surface run-off and throughflow as identical; surface run-off travels over the ground, whereas throughflow travels within the soil.
- Assumes urbanisation increases infiltration; impermeable surfaces reduce it and increase surface run-off.
- Describes the annual regime as a single flood event; it is the seasonal pattern of discharge across the year.