Sec 2 Floods #3

Which of the following are reasons why some cities are prone to floods?

• Height of land above sea

• Proximity to water bodies

• Permeability of surface cover

• Channel capacity

Surface cover with high permeability are ______ capable in allowing water to infiltrate into the soil.

• More

• Less

Surface covers that have low permeability include(s) ________

• Nature reserves

• Indoor sports hall

• Concrete roads

• Highly urbanised cities

New Orleans is about 3m below sea level. However, it has _______________ measures to reduce the likelihood of floods.

• Flood determination

• Flood prediction

• Flood detection

• Flood mitigation

Land that gets flooded when the river overflows is called the ___________.

• Channel

• Drainage Basin

• Flood plain

• Watershed

The end of the river where it meets the sea is called the _________ .

• River mouth

• River source

• Levee

• Dam

Water that is unable to infiltrate into the ground will lead to high __________ runoff, and likelihood of floods.

Places with more natural ___________ allows more infiltration as soil is permeable.

Floods occur when there is too much rain and the __________ of the channel is exceeded.

Which of the following actions may result in flooding of the Singapore River?

• Dumping of plastic waste

• Channel modification to reduce capacity

• Dragonboating Competition

• Prolonged intense rainfall