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

Name the 4 parts of a flood hydrograph

-Peak rainfall
-Rising limb
-Peak discharge
-Failing limb

2

Give 5 causes of the Boscastle flooding

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

Give 6 effects of the Boscastle flooding

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

4

What other example of river flooding did you study?

somerset Levels in 2014

5

Give four causes of the somerset levels flooding?

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

6

Name 3 hard engineering river management strategies

-Embankments
-Channelistion
-Dams

7

Name 3 soft engineering river management strategies

-Washlands
-Land use zoning
-Afforestation

8

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

-The fetch

-Strength of wind

-Time wind has been blowing for

9

What is it called when water washes up the beach?

Swash

10

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

Backswash

11

What is a concordant coastline?

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

12

What is a discordant coastline?

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

13

What is unconsolidated rock?

Rock that is only loosely compacted and is not properly glued