Lesson 3.2.3.5
3.2.3.5 Urban drainage Quiz: AQA Geography, Unit 2
20 questions
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Lesson 3.2.3.5, Urban drainage: 20 multiple choice questions for the AQA Geography (7037), Unit 2: Human geography, written with Revision Ninja.
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The 20 questions
-
How do impermeable urban surfaces affect the local hydrological cycle?
- Increased surface runoff
- Reduced peak discharge
- Increased soil infiltration
- Increased groundwater recharge
-
What does a shorter lag time on an urban hydrograph signify?
- Faster river response
- Slower surface runoff
- Higher infiltration rate
- Reduced peak discharge
-
What happens to peak river discharge when a drainage basin becomes heavily urbanised?
- It increases
- It fluctuates randomly
- It remains stable
- It decreases
-
How does increasing impermeable surface cover in a catchment affect flood risk?
- Eliminates flood risk
- Stabilises river flow
- Decreases flood risk
- Increases flood risk
-
Which sustainable urban drainage system uses a shallow vegetated channel to slow and filter runoff?
- Soakaway
- Storm drain
- Sewage outfall
- Swale
-
Which SuDS feature allows water to soak through a car park surface?
- Permeable paving
- Deep storm drains
- Concrete culverts
- Retention ponds
-
What is a primary aim of urban river restoration schemes?
- Culverting open channels
- Straightening river meanders
- Reconnecting natural floodplains
- Concreting river beds
-
Which catchment feature best reduces the flashiness of an urban river hydrograph?
- Steep slopes
- Concrete channels
- Paved surfaces
- Green spaces
-
What is the main aim of Sustainable Urban Drainage Systems (SuDS)?
- Maximise piped flow
- Eliminate infiltration
- Accelerate surface runoff
- Mimic natural drainage
-
A hydrograph for an urban catchment shows a peak discharge of 60 cumecs compared with 25 cumecs before urbanisation, for the same storm. What is the percentage increase in peak discharge?
- 240%
- 35%
- 140%
- 60%
-
What is a major spatial constraint when installing SuDS in high-density cities?
- Low rainfall levels
- High land requirement
- Rapid soil erosion
- Excessive water demand
-
Which surface change in urban areas primarily increases overland flow and flood risk?
- Impermeable paving
- Dense vegetation cover
- High evapotranspiration
- Deep infiltration
-
What happens when an extreme storm exceeds an urban drainage system's capacity?
- Enhanced groundwater recharge
- Zero surface runoff
- Surface water flooding
- Complete infiltration success
-
Which SuDS approach manages and treats urban runoff at or near its origin?
- Source control
- End-of-pipe discharge
- Deep-channel dredging
- River culverting
-
How does extensive urban paving typically affect underlying groundwater recharge?
- Increases recharge
- Doubles baseflow
- Has zero impact
- Decreases recharge
-
What typical hydrograph change occurs following the urbanisation of a river catchment?
- Lower peak flow
- Longer lag time
- Shorter lag time
- Higher infiltration rate
-
A catchment is 40 km2 and 30% of it is impermeable. Which computed value gives the impermeable area?
- 12 km2
- 30 km2
- 28 km2
- 4 km2
-
What is a major disadvantage of enclosing urban river channels within underground culverts?
- Increased flood risk
- Enhanced river biodiversity
- Higher soil infiltration
- Greater floodplain storage
-
Which hydrological term describes water that soaks into the ground and recharges groundwater?
- Evaporation
- Overland flow
- Interception
- Infiltration
-
A green roof retains 60% of rainfall during a storm of 20 mm. How much rainfall runs off the roof?
- 12 mm
- 4 mm
- 20 mm
- 8 mm
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