Agenda with Maps and Applications (21Mb) - pdf - Selby District ...

10) An appropriate flood risk assessment in accordance with the
requirements of PPG25.
2.14.2 In terms of flood risk the “Approved Development Brief” for the wider
site from 2003, notes that a Flood Risk Assessment will be required.
Furthermore flow attenuation should be utilised, including balancing
areas, which should form an integral part of the existing site water
features, where this is compatible with their existing drainage function
and that where SUDS is not feasible, filtered surface water run off
should be discharged directly to watercourses.
2.14.3 At a regional policy level then Policy ENV1 of the RSS, notes that
“Region will manage flood risk pro-actively by reducing the causes of
flooding to existing and future development”.
2.14.4 NPPF Paragraphs 93 to 108 relate to meeting the challenge of climate
change, flooding and coastal change and should be read alongside the
NPPF Technical Guidance. In particular paragraph 94 states Local
planning authorities should adopt proactive strategies to mitigate and
adapt to climate change, taking full account of flood risk, coastal
change and water supply and demand considerations.
2.14.5 The land within the application site lies within Flood Zones 1, 2 and 3a.
The majority of the application site being in Flood Zone 2. Flood Zone
1 comprises of land having a less than 1 in 1000 annual probability of
river or sea flooding. Flood Zone 2 comprises of land having between
a 1 in 100 and 1 in 1000 probability of river flooding or between 1 in
200 and 1 in 1000 annual probability of sea flooding in any year. Flood
Zone 3a comprises of land assessed as having a 1 in 100 or greater
annual probability of river flooding or 1 in 200 or greater annual
probability of flooding from the sea.
2.14.6 The Flood Risk Vulnerability Classification of Technical Guidance to
the NPPF defines a Residential use as “more vulnerable” and table 3 of
the Technical Guidance to the NPPF defines a ‘More Vulnerable’ use
as being appropriate development in Flood Zone 1 and 2. A ‘More
Vulnerable’ use in Flood Zone 3 is also appropriate if the exception test
is passed.
2.14.7 Paragraph 100 of the NPPF states that inappropriate development in
areas at risk of flooding should be avoided by directing development
away from areas at highest risk, but where the development is
necessary, making it safe without increasing flood risk elsewhere.
2.14.8 Paragraph 101 of the NPPF states the aim of the Sequential Test is to
steer new development to areas with the lowest probability of flooding.
Development should not be allocated or permitted if there are
reasonably available sites appropriate for the proposed development in
areas with a lower probability of flooding. The Strategic Flood Risk
65