River discharge an flooding

Question 1

River discharge

Answer 1

Volume of river water flowing per seconds (cumecs)

Question 2

Physical factors that affect flood risks

Answer 2

• Heavy rainfall
  
  • soil ceome saturated leading to runoff
• Geology (rock type)
  
  • Clay soils and some rocks are impermable so
    runoff is increased
• Relief (changes in land height)
  
  • Steep sided valleys channel water to flow
    quickly into rivers causing greater discharge

Question 3

Human factors that affect the flood risks

Answer 3

• Land use
  
  • Building materials are impermable increasing
    surface runoff
• Deforestation
  
  • cut off of trees that intercept rain water