-Rivers- Lower Course

Question 0

What is a delta?

Answer 0

Deltas are little islands of deposition caused by the river found near the river mouth.

Question 1

Lower course facts

Answer 1

-shallow river channel -river mouth -water travels slowly=deposition=deltas -flooding

Question 2

What is a flood?

Answer 2

Floods occur when rivers overflow

Question 3

What are flood plains and levees?

Answer 3

Levees are natural borders created by deposition that stop water from rivers overflowing. The floodplain is the area of lighter materials that are deposited further away from the river.

Question 4

Name 5 factors that might cause flooding.

Answer 4

-hard rock (or concrete)- does not absorb water as well. -deforestation- not enough trees to absorb water. -saturated soil- cannot absorb more water. -tsunami/hurricane (unlikely) -steep slopes—> water flow is very fast—> doesn’t give solid enough time to absorb water.