River Flooding Flashcards
What is a river flood?
A river flood is when a river overflows and water spreads out onto land
What are the 4 causes of flooding?
- Rock and soil type
- Very wet soil
- Very dry soil
- Steep slopes
Explain Rock and soil type
Impermeable rocks and soil don’t allow rain to soak through them.
Explain Very wet soil
Any further rain is unable to soak into the ground and remains on the surface.
Explain Very dry soil
Rain is unable to soak through the crust and so it remains on the surface.
Explain Steep slopes
The water has little time to soak into the ground, so most stays on the surface
What are 2 ways humans increase the risk of flooding?
2 ways humans increase the risk of flooding is by cutting down trees and building more towns.
What does Flood Alert mean?
It means flooding is possible
What does Flood Warning mean?
It means flooding of homes, and main roads is expected. Immediate action required.
What does Severe Flood Warning mean?
It means severe flooding is expected with a danger to life and property. Immediate action required.
What are 3 things to do before a flood?
- Be alert for flood warnings
- Collect warm clothes, food, and a flashlight
- Switch off electricity and gas
What are 3 things to do during a flood?
- Stay informed
- Never walk, drive, or swim in flood water
- Keep your home secured with sandbags
What are 3 things to do after a flood?
- Open windows and doors for ventilation
- Wash taps and run them before using them
- Clean up by disinfecting walls and floors
What are 8 ways to reduce the risk of flooding?
1.Dams
2.Forests
3.Embankments
4.Concrete linings
5.Straight channels
6.Wider and deeper channels
7.Overflow channels
8.Allow flooding
