Physical landscapes in the UK: River landscapes in the UK - Hydrograph, Causes Of Flooding, Lower Course Deposition Landform – Levees and Floodplains

Question 1

Hydrograph

Answer 1

Graph that plots river discharge after a storm. It shows how discharge rises after a storm, reaches its peak and then returns to the normal rate of flow.

Question 2

Causes of flooding - physical factors

Answer 2

. Precipitation:
	- Heavy rain
	- Prolonged rain
	- Snow melt 
. Geology (rock type):
	- Impermeable
. Steep slopes
. Low lying land

Question 3

Causes of flooding - human factors

Answer 3

. Farming:
	- Removal of hedges
	- Intensive arable farming leaves soil bare
	- Disappearing fields.
. Urbanisation
. Deforestation

Question 4

Lower Course Deposition Landform – Levees and Floodplains

Answer 4

1. • Wider, flatter valley caused by meanders shifting along valley.
     - River contained within banks under normal flow.
2. • Smaller material carried further.
     - River in flood, banks overtopped.
     - Larger material deposited next to channel as speed/energy lost.
3. • Layers of material from successive floods.
     - Levees increased in height.
     - Fertile, flat floodplain.