Hydrographs, Flooding, River Management, Coasts intro

Question 1

Name the 4 parts of a flood hydrograph

Answer 1

• Peak rainfall
• Rising limb
• Peak discharge
• Failing limb

Question 2

Give 5 causes of the Boscastle flooding

Answer 2

1. High tide
2. Steep valley sides - overland flow
3. Impermeable surfaces - surface runoff
4. Ground saturated due to storms in the days before 5.Confluence of the River Valency and River Jordan.

Question 3

Give 6 effects of the Boscastle flooding

Answer 3

• Roads blocked - Helicopter needed
• Property destroyed,
• Emergency accommodation needed
• Vehicles carried out to sea -Insurance costs increased for homeowners
• Tourism industry seriously affected.

Question 4

What other example of river flooding did you study?

Answer 4

somerset Levels in 2014

Question 5

Give four causes of the somerset levels flooding?

Answer 5

• Flat landscape
• Levels only 8m above sea level
• Lots of rainfall in the days before therefore ground was saturated
• no dredging.

Question 6

Name 3 hard engineering river management strategies

Answer 6

• Embankments
• Channelistion
• Dams

Question 7

Name 3 soft engineering river management strategies

Answer 7

• Washlands
• Land use zoning
• Afforestation

Question 8

The size and energy of a wave depends upon 3 factors. What are they?

Answer 8

• The fetch
• Strength of wind
• Time wind has been blowing for

Question 9

What is it called when water washes up the beach?

Answer 9

Swash

Question 10

What is it called when water washes back down the beach?

Answer 10

Backswash

Question 11

What is a concordant coastline?

Answer 11

Where the geology is parallel to the coastline. It has one type of rock.

Question 12

What is a discordant coastline?

Answer 12

Where the geology is at 90 degrees to the coastline. It has different types of rock.

Question 13

What is unconsolidated rock?

Answer 13

Rock that is only loosely compacted and is not properly glued