Urban Drainage

• what percentage of London is at medium to high flood risk

  11% according to the Environmental Agency
• What happened in JULY 2021

  Heavy rain events lead to flooding, resulting in 120 Kensington and Chelsea residents evacuating their homes

  _ this was a result of urban flash flooding
• what makes the impacts of flooding worse in London?

  basement apartments in London are common and building values are high , making impacts of flooding worse
• what are the main human causes of flooding in London

  • Blocked drains
  • Aging drainage systems
  • Impermeable surfaces