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This Map was provided by the Environment Agency direct to Your Mirfield 19 years of vital flood information all on one map. Jan 2020

By pmadmin
In River Calder Mirfield
Jan 25th, 2020
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Flood History Autumn 2000, February 2002, December 2015, March 2019 this map maps out the flooding of Mirfield over the last 19 years. and provides mAOD information. What does mAOD mean “above ordnance datum”.

The Flood Map for Planning shows the following:

  1. Flood Zone 3 (dark blue area on the enclosed map): natural flood plain area that could be affected by flooding from rivers and/or the sea – not taking into account the presence of any flood defences
  • For flooding from rivers the map indicates the extent of a flood with a 1% (1 in 100) chance of happening each year;
  • For flooding from the sea the map shows the extent of a flood with a 0.5% (1 in 200) chance of happening each year.
  1. Flood Zone 2 (light blue area): natural flood plain area that could be affected by flooding from rivers and/or the sea – not taking into account the presence of any flood defences. Flood Zone 2:
  • indicates the extent of a flood with a 0.1% (1 in 1000) chance of happening each year.
  • and/or indicates the greatest recorded historic flood, whichever is greater.
  1. Flood defences built in the last five years to protect against river floods with a 1% (1 in 100) chance of happening each year, together with some natural or constructed entities which retain, store or channel water and which may protect against smaller floods.
  2. Areas benefiting from flood defences – areas that benefit from the flood defences shown, in the event of a river flood with a 1% (1 in 100) chance of happening each year, or a flood from the sea with a 0.5% (1 in 200) chance of happening each year. If the defences were not there, these areas would flood.

Regards Steve

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