Choose the hydrograph below that would most accurately represent an urban catchment - AQA - A-Level Geography - Question 3 - 2019 - Paper 2
Question 3
Choose the hydrograph below that would most accurately represent an urban catchment.
A
Discharge (cumecs) | Peak rainfall (mm)
Lag time ... show full transcript
Worked Solution & Example Answer:Choose the hydrograph below that would most accurately represent an urban catchment - AQA - A-Level Geography - Question 3 - 2019 - Paper 2
Step 1
Choose the hydrograph below that would most accurately represent an urban catchment.
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Answer
The hydrograph that would most accurately represent an urban catchment is B. This is because urban catchments typically experience a rapid increase in discharge due to the impervious surfaces (like roads and buildings), which lead to quicker runoff and a shorter lag time. Hydrograph B shows a steeper rise and fall in discharge, emphasizing the quick response time characteristic of urban areas.