6.3 Flooding (impacts and stra)

Question 1

Natural Causes of flooding

Answer 1

• heavy rainfall, prolonged rainfall, snowmelt
• land relief (areas that have steep slope)
• saturated soil, compacted soil (water cant infiltrate)
• strom surges, tsunamis

Question 2

Human causes

Answer 2

Deforestation (Reduces interception and infiltration)
Urbanisation (building of roads (impermeable)-less infiltration
Cultivation
climate change (rise in sea level/snow melt)

Question 3

The impacts of flooding

Answer 3

• loss of life,
• loss of livestock,
• loss of crops,
• damage to buildings and infrastructure,
• contamination of drinking water supplies,
• water related disease,
• financial losses

Question 4

Managing the impacts of flooding

Answer 4

• monitoring and warning, (run-off, through-flow, ground water flow)
• weather forecasting
• better drainage systems
• use of storm hydrographs (to predict when the flood can occur)
• emergency shelters,
• evacuation plans
• land zoning
• rebuilding of damaged areas,
• flood defences on riverbanks

Question 5

Opportunities presented by Flooding

Answer 5

deposition of silt (fertile for agriculture) on farmland

Question 6

why do ppl still stay in regions
affected by flooding

Answer 6

● have lived there all their life so cannot easily leave or nowhere else to move
● familial ties
● lack of money
● no employment
● Confident, well-prepared (about prediction, preparation and protection)