Boscastle

• What are the management strategies to reduce flood risk in Boscastle?

  • Widening and deepening river channels
  • Replacing low bridges with wider ones
  • Raising car parks with permeable surfaces
  • Encouraging vegetation maintenance and tree planting
• How did the confluence of three rivers contribute to the Boscastle floods?

  It caused rapid surface runoff
• What was a significant human factor in the Boscastle floods?

  Cutting down trees for farming
• What was the rainfall amount that caused the Boscastle floods?

  60 mm in 2 hours
• What is the significance of the confluence of three rivers in Boscastle?

  It increases the risk of flooding
• How does the removal of trees affect the Boscastle floods?

  It limits interception and increases runoff
• What is the main cause of flooding in Boscastle?

  Heavy rainfall and saturated ground
• How does the removal of trees contribute to flooding in Boscastle?

  Reduces water absorption and increases runoff
• How does the confluence of three rivers affect flooding in Boscastle?

  Increases the risk of rapid runoff
• What is the main cause of flooding in Boscastle?

  Heavy rainfall and saturated ground
• How does the removal of trees contribute to flooding in Boscastle?

  Reduces water absorption and increases runoff
• How does the confluence of three rivers affect flooding in Boscastle?

  Increases the risk of rapid runoff
• What caused the flooding event mentioned?

  Heavy rainfall of 60 mm in 2 hours
• What was the condition of the ground before the flooding?

  The ground was already saturated
• What led to the flash-flood event?

  Heavy rainfall on already saturated ground
• What geological feature contributed to rapid surface runoff?

  Impenetrable rock with steep slopes
• How did the steep slopes affect the flooding?

  They caused rapid surface runoff into rivers
• What was the effect of the confluence of three rivers?

  It contributed to the flooding severity
• What was the annual regime coinciding with the flooding?

  A high tide physical regime
• How much rainfall occurred in 24 hours during the storm?

  Over 200 mm of rain
• What caused water to flow quickly into the river channel?

  Steep valley sides during heavy rainfall
• What was the impact of the flooding on homes and businesses?

  They were swept away affecting over 1000 people
• What was lost due to the flooding event?

  Income from tourism was lost
• What was the number of subsequent insurance claims after the flooding?

  A vast number of insurance claims were filed
• What was the fate of the lives during the flooding?

  No lives were lost during the flooding
• What contributed to the rapid response of emergency services?

  The rapid response of emergency services helped save lives
• How did human activities contribute to the flooding risk?

  Deforestation and urbanization increased runoff
• What measures can reduce flooding risk?

  Widening and deepening river channels
• What is the benefit of removing low bridges?

  It allows more water to flow through
• How can raising car parks help manage flooding?

  It uses permeable surfaces to absorb water
• What is the purpose of removing dead trees?

  To prevent them from being swept away
• What do landowners encourage to manage flooding?

  Maintaining vegetation and planting new trees
• What are the key factors contributing to flooding events?

  • Heavy rainfall
  • Saturated ground conditions
  • Steep slopes and impermeable rock
  • Confluence of rivers
  • High tide physical regime
  • Human activities like deforestation
• What are the management strategies to reduce flooding risk?

  • Widening and deepening river channels
  • Removing low bridges
  • Raising car parks with permeable surfaces
  • Removing dead trees
  • Encouraging vegetation maintenance and planting