strategic flood risk assessment supplement - Hambleton District ...

information in the SFRA addendum is that issued in January 2009. The Environment Agency will
update the data as better information becomes available e.g. changes in hydrological river
response, observations following flood events or improved modelling techniques. Locations may
also be at risk from other sources of flooding that have not been surveyed here, such as high
ground water levels, overland run off from heavy rain, or failure of infrastructure such as sewers or
storm drains.
The SFRA January 2006 does identify areas at flood risk from other sources; these have been
identified through a process of consultation, though there may be flood risks from other sources
that are not identified in the SFRA.
When in doubt the Environment Agency should be consulted. The limits of the Flood Zones 2 and
3 are indicative of the area which could be affected by flood events and is largely based on
modelled data.
Where appropriate the flood maps show flood defences and for major defences the areas of
benefit from them. Where present, flood defences do not remove the chance of flooding and can
be over topped or fail in extreme weather conditions or where the flood event exceeds the design
standard of the defence. It does not show the effects of climate change.
1.8 Key to Plans
HDC requested sandbags
Oct 2000 to 2006
E.A. Flood Zone 2
0.1% annual flooding
probability
Main River
E.A. Flood Zone 3
1% annual flooding
probability
4