River derwent

• A named river within the British isles

  River Derwent
• When did the River Derwent flood?

  March 1999
• Name 3 physical causes of the flooding

  ~heavy rainfall-250mm of rainfall on north York moors 28/2-11/3

  ~lack of infiltration; ground was already saturated

  ~time of year; snowmelt adding to the discharge
• Name 3 human causes of the river Derwent flooding

  ~peat removal- lowered storage capacity

  ~new building- areas of floodplain urbanised, new estate at malton reduced infiltration and increased surface runoff