Meteorological Hazard 2

Question 1

What are the weather warnings

Answer 1

Green- no severe weather, amber-be aware, orange- be prepared, red- take action

Question 2

the definition of a flood

Answer 2

a body of water which rises to overflow land that is not normally submerged.

Question 3

FloodPlain

Answer 3

slower moving water deposits sediment, over bank flow deposits sediment

Question 4

Upstream floods (often localised

Answer 4

upper parts of drainage basins, intense rainfall of short duration over a relatively small area- flash floods (large volume.

Question 5

downstream floods (regional)

Answer 5

cover a wide area produced by storms of long duration’s that saturate the soil and increase runoff

Question 6

River flooding

Answer 6

heavy rainfall that fills rivers and streams above their normal capacity. very high river or coastal tides that cause levels to rise or surge. this means areas that are low lying and close to the source of a flood will be the most vulnerable.

Question 7

Surface water flooding

Answer 7

rainwater collects on the ground and cannot find a source to drain. this localised flooding mainly happens when the ground above any more water in a particular area,or if sewers and underground drains become blocked or cannot cope with the excess water trying to drain into them. Often in urban areas.

Question 8

Flooding is usually caused by

Answer 8

prolonged heavy rain (regional), intense precipitation (flash floods) where both can occur simultaneously.

Question 9

Damage caused by floods affected by:

Answer 9

land use on the floodplain, depth and speed of movement of floodwater. Rate of rise and duration on flooding. Season and previous rains. quantity and type of sediment deposited by floodwaters. effectiveness of forecasting, warning and evacuation

Question 10

Where will it flood

Answer 10

causes of most floods are complex, arise from combined effects of weather, geology, social vegetation and human influences.