river management techniques

Question 1

river management techniques (7)

Answer 1

1. dams
2. channel straightening and widening
3. flood relief channel
4. embankments
5. river channel restoration
6. flood plain zoning
7. afforestation

Question 2

hard engineering

Answer 2

1. dams
2. embankments
3. flood relief channel
4. channel straightening and widening

Question 4

dams

Answer 4

• large wall built across river
• can stop flooding by controlling the water flow by holding back water in a large reservoir

Question 5

channel straightening and widening

Answer 5

• widened to carry more water
• straightened, water travels faster so it wont stay in one area

Question 6

flood relief channel

Answer 6

• new manmade river channel is built to divert excess water away from an area

Question 7

embankments

Answer 7

• concrete placed alongside a river to protect land around it
• increase river’s height so it lowers chance of flooding

Question 8

soft engineering (4)

Answer 8

1) river channel restoration
2) flood plain zoning
3) afforestation
4) terracing of land

Question 9

river channel restoration

Answer 9

• return rivers to their natural meandering courses
• slows down flow and reduces flood risk

Question 10

flood plain zoning

Answer 10

• allowing only certain land uses on the floodplain
• reduces flood to houses n important buildings

Question 11

afforestation

Answer 11

• trees planted near to the river
• greater interception of rainwater and lower river discharge

Question 12

terracing of land

Answer 12

• building narrow strips of land on a slope so ppl can plant crops there
• reduces runoff as water can stay within terrace