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BGS Coastal Mapping

Keith Westhead

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Coastal mapping pilot area – Dorset Coast, S England

•Collaboration with MAREMAP partners, CCO, Uni Southampton

•Lidar, Bathymetry etc. and geological mapping

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• Aerial Lidar stitched to nearshore bathymetry (1m resolution)

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• Draped with 1:10k BGS geological mapping

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• Geological mapping extended offshore through ‘White Ribbon’

• Better understanding of full ‘coastal zone’

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• Better 3D geology & coastal hazard analysis e.g. landslides, erosion, flooding

• Infrastructure, heritage, tourism, planning etc.

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• Targeted high resolution ground-based laser-scanning

• E.g. landslide complexes

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SUMMARY - Current focus:

•Coastal zone geological mapping & 3D modelling, to underpin:

•Cliff instability modelling

•Coastal retreat/RSL modelling

•Societal impacts in coastal zone