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London Borough of Bexley
Strategic Flood Risk Assessment – Level 2
Appendix C – Level 2 Mapping – Erith and Slade Green Sustainable Growth Area
2 June 2011
Please note that the modelling on which these maps are based may have been superseded.
Bexley SFRA
Figure C1Erith and Slade GreenDelineation of Flood Risk on SHLAA Sites
23736-A030.mxd RAMPJ
Key:
Based upon the Ordnance Survey Map with the permission of the Controller of Her Majesty's Stationery Office. © Crown Copyright. London Borough of Bexley AL100017693
Scale: 1:14000 @ A3July 2010
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H:\Projects\HM-255\23000-Projects\23736 - Bexley SFRA\Data\GIS\ESRI\Level2_projects
0 190 380 570 760Meters
London Borough of Bexley BoundarySHLAA Sites - With Flood Zone ClassificationFlood Zone 3Flood Zone 2
Flood Zone 1
LDF Growth Areas
Basedon Environment Agency Flood Zones 2008
Belvedere
Erith and Slade Green
Bexley SFRA
Figure C2Erith and Slade GreenDelineation of Flood Riskon Employment Sites
23736-A040.mxd RAMPJ
Key:
Based upon the Ordnance Survey Map with the permission of the Controller of Her Majesty's Stationery Office. © Crown Copyright. London Borough of Bexley AL100017693
Scale: 1:13000 @ A3July 2010
550000
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H:\Projects\HM-255\23000-Projects\23736 - Bexley SFRA\Data\GIS\ESRI\Level2_projects
0 190 380 570 760Meters
London Borough of Bexley Boundary
LDF Growth Areas
Belvedere
Erith and Slade Green
Employment Sites - With Flood Zone ClassificationFlood Zone 3Flood Zone 2
Flood Zone 1
Indicates Primary Sites
Bexley SFRA
Figure C3Erith and Slade Green - Maximum Predicted Flood Depths Fromall Breaches in the 1 in 200 Year Tidal Event Plus CC
23736-A041.mxd RAMPJBased upon the Ordnance Survey Map with the permission of the Controller of Her Majesty's Stationery Office. © Crown Copyright. London Borough of Bexley AL100017693
July 2010
550000
550000
551000
551000
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552000
553000
553000
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London Borough of Bexley Boundary
LDF Growth Areas
Belvedere
Erith and Slade Green
Key:
Scale: 1:13000 @ A3H:\Projects\HM-255\23000-Projects\23736 - Bexley SFRA\Data\GIS\ESRI\Level2_projects
0 170 340 510 680Meters
Maximum Flood Depth (m)
0.25 - 0.50.50 - 0.750.75 - 11.00 - 1.51.51 - 2
2.01 - 2.52.51 - 33.01 - 3.53.51 - 44.01 - 55.01 - 6
0 - 0.25
SHLAA SitesEmployment Sites
Bexley SFRA
Figure C4Erith and Slade Green - Maximum Predicted Flood Hazard Fromall Breaches in the 1 in 200 Year Tidal Event Plus CC
23736-A042.mxd RAMPJBased upon the Ordnance Survey Map with the permission of the Controller of Her Majesty's Stationery Office. © Crown Copyright. London Borough of Bexley AL100017693
July 2010
550000
550000
551000
551000
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552000
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Belvedere
Erith and Slade Green
Key:
Scale: 1:13000 @ A3H:\Projects\HM-255\23000-Projects\23736 - Bexley SFRA\Data\GIS\ESRI\Level2_projects
0 175 350 525 700Meters
London Borough of Bexley Boundary
LDF Growth Areas
SHLAA SitesEmployment Sites Zone of Potential Rapid Inundation
See Section 2.2.2 of the Level 2 SFRA Report for details of this zone
< 0.75 Caution
1.25 - 2.5 'Dangerous for Most'
> 2.5 'Dangerous for All'
Flood Hazard (FD2321/TR2 - Table 3.2)
0.75 - 1.25 'Dangerous for Some'
Bexley SFRA
Figure C5Erith and Slade Green - Maximum Predicted Flood Water Level Fromall Breaches in the 1 in 200 Year Tidal Event Plus CC
23736-A043.mxd RAMPJ
Based upon the Ordnance Survey Map with the permission of the Controller of Her Majesty's Stationery Office. © Crown Copyright. London Borough of Bexley AL100017693
July 2010
550000
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551000
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552000
553000
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Belvedere
Erith and Slade Green
Key:
Scale: 1:13000 @ A3H:\Projects\HM-255\23000-Projects\23736 - Bexley SFRA\Data\GIS\ESRI\Level2_projects
0 175 350 525 700Meters
4.11 - 4.404.41 - 4.894.90 - 5.30
5.31 - 5.795.80 - 6.21
Maximum Water Surface ElevationFrom all Breaches (1 in 200yr +CC) mAOD
0.01 - 3.703.71 - 4.10
6.22 - 6.75
London Borough of Bexley Boundary
LDF Growth Areas
SHLAA SitesEmployment Sites
Bexley SFRA
Figure C6Erith and Slade Green - Combined LikelyRate of Inundation from all Simulated Breaches (1 in 200yr Plus CC)
23736-A044.mxd RAMPJBased upon the Ordnance Survey Map with the permission of the Controller of Her Majesty's Stationery Office. © Crown Copyright. London Borough of Bexley AL100017693
July 2010
550000
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London Borough of Bexley Boundary
LDF Growth Areas
Belvedere
Erith and Slade Green
Key:
Scale: 1:13000 @ A3H:\Projects\HM-255\23000-Projects\23736 - Bexley SFRA\Data\GIS\ESRI\Level2_projects
0 175 350 525 700Meters
SHLAA SitesEmployment Sites
Less than 15 hours
Likely Rate of Flooding Onset (Hours)Less than 3 hours
Less than 6 hours
Area converd at maximum extent
Bexley SFRA
Figure C7Erith and Slade Green - Incidents ofSurface Water Flooding and Modelledareas of Potential Surface Water FlowRoutes and Ponding Areas
23736-A045.mxd RAMPJBased upon the Ordnance Survey Map with the permission of the Controller of Her Majesty's Stationery Office. © Crown Copyright. London Borough of Bexley AL100017693
July 2010
550000
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1800
00
London Borough of Bexley Boundary
LDF Growth Areas
Belvedere
Erith and Slade Green
Key:
Scale: 1:13000 @ A3H:\Projects\HM-255\23000-Projects\23736 - Bexley SFRA\Data\GIS\ESRI\Level2_projects
0 175 350 525 700Meters
SHLAA SitesEmployment Sites
Environment Agency Flood Zone 3 (September 2008)Potential Surface Water Flow Routesand Ponding Areas (1 in 100 year +CCrainfall event)
(Data Source = London Borough of Bexley)
Surface Water Flooding Locations Classified by Source
Foul waterSurcharge from sewersSurface waterUnknown
Bexley SFRA
Figure C8Erith and Slade GreenDepth to GroundwaterHead (m below ground level)
23736-A046.mxd RAMPJ
Based upon the Ordnance Survey Map with the permission of the Controller of Her Majesty's Stationery Office. © Crown Copyright. London Borough of Bexley AL100017693
July 2010
0
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Belvedere
Erith and Slade Green
Key:
Scale: 1:13000 @ A3H:\Projects\HM-255\23000-Projects\23736 - Bexley SFRA\Data\GIS\ESRI\Level2_projects
0 170 340 510 680Meters
Groundwater Contours (m) below ground Supplied by EA
Groundwater Head (m below ground)-3 - 00 - 2.52.51 - 55.01 - 7.57.51 - 1010.01 - 15
15.01 - 2020.01 - 2525.01 - 3030.01 - 3535.01 - 4040.01 - 45
45.01 - 5050.01 - 55
Depth to groundwater head was based upon ground elevations provided by 5m SAR topographic data
London Borough of Bexley BoundaryLDF Growth Areas
SHLAA SitesEmployment Sites
Bexley SFRA
Figure C9Erith and Slade GreenSoil Infiltration Potential to Inform theSuitability of Infiltration SuDS Techniques
23736-A047.mxd RAMPJ
Based upon the Ordnance Survey Map with the permission of the Controller of Her Majesty's Stationery Office. © Crown Copyright. London Borough of Bexley AL100017693
July 2010
550000
550000
551000
551000
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553000
553000
1760
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1800
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1800
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Belvedere
Erith and Slade Green
Key:
Scale: 1:13000 @ A3H:\Projects\HM-255\23000-Projects\23736 - Bexley SFRA\Data\GIS\ESRI\Level2_projects
0 170 340 510 680Meters
London Borough of Bexley BoundaryLDF Growth Areas
SHLAA SitesEmployment Sites
IntermediateIntermediate with caution- owing to SPZ designation
Infiltration SuitabilitySuitability of Infiltration SuDS
HighlyHighly with caution - owing to SPZ designation
No data available
LowLow with caution- owing to SPZ designation
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