Geography- Flood risk

Factors increasing flood risk

What causes flooding?

-long periods of rain

-sudden floods called flash floods occur in summer and are associated with heavy rainstorms

-physical and human factors aswell:

Physical

Precipitation- torrential rainstorms

Geology- impermeable rocks dont aloow water to pass through, so it flows over land into river channels 

Relief- steep slopes means water flows quickly into river channels 

Human

Urbanisation- impermeable surfaces e.g. tarmac roads,…