Causes of river flooding

What is the impact of deforestation on river volume?

• It increases river volume
• It prevents river volume
• It decreases river volume
• It has no impact on river volume

What is the effect of deforestation on soil erosion?

• It increases soil erosion
• It prevents soil erosion
• It decreases soil erosion
• It has no effect on soil erosion

What is the impact of urbanisation on river volume?

• It has no impact on river volume
• It decreases river volume
• It prevents river volume
• It increases river volume

What effect does urbanisation have on rainwater?

• It allows rainwater to infiltrate into the ground
• It decreases river volume
• It increases run-off
• It increases evaporation rates

What is the impact of urbanisation on flooding?

• It increases the occurrence of flooding
• It decreases the occurrence of flooding
• It prevents the occurrence of flooding
• It has no impact on the occurrence of flooding

What is the impact of climate change on evaporation rates?

• It increases evaporation rates
• It prevents evaporation rates
• It decreases evaporation rates
• It has no impact on evaporation rates

Which country experiences heavy monsoon rain?

• Brunei

• China
• Pakistan
• India

What are the physical causes of river flooding?

• Deforestation, urbanisation, climate change, coastal flooding
• Drought, desertification, groundwater depletion, erosion
• Excessive rainfall, sedimentation, snowmelt, flat land near the river
• Heavy winds, earthquakes, tsunamis, volcanic eruptions

What happens to a river channel when sedimentation occurs?

• It becomes shallower and narrower
• It becomes wider and shallower
• It becomes wider and deeper
• It becomes deeper and narrower

What modifications can urbanisation make to rivers?

• Deepening and widening the river channel
• Building low bridges across rivers
• Preventing sedimentation
• Increasing the capacity of river channels