Hydrographs, Flooding, River Management, Coasts intro Flashcards Preview

Z GCSE Geography component 1 > Hydrographs, Flooding, River Management, Coasts intro > Flashcards

Flashcards in Hydrographs, Flooding, River Management, Coasts intro Deck (13)
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1
Q

Name the 4 parts of a flood hydrograph

A
  • Peak rainfall
  • Rising limb
  • Peak discharge
  • Failing limb
2
Q

Give 5 causes of the Boscastle flooding

A
  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.
3
Q

Give 6 effects of the Boscastle flooding

A
  • Roads blocked - Helicopter needed
  • Property destroyed,
  • Emergency accommodation needed
  • Vehicles carried out to sea -Insurance costs increased for homeowners
  • Tourism industry seriously affected.
4
Q

What other example of river flooding did you study?

A

somerset Levels in 2014

5
Q

Give four causes of the somerset levels flooding?

A
  • Flat landscape
  • Levels only 8m above sea level
  • Lots of rainfall in the days before therefore ground was saturated
  • no dredging.
6
Q

Name 3 hard engineering river management strategies

A
  • Embankments
  • Channelistion
  • Dams
7
Q

Name 3 soft engineering river management strategies

A
  • Washlands
  • Land use zoning
  • Afforestation
8
Q

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

A
  • The fetch
  • Strength of wind
  • Time wind has been blowing for
9
Q

What is it called when water washes up the beach?

A

Swash

10
Q

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

A

Backswash

11
Q

What is a concordant coastline?

A

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

12
Q

What is a discordant coastline?

A

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

13
Q

What is unconsolidated rock?

A

Rock that is only loosely compacted and is not properly glued