Determination and prediction of sediment yields from recession of the Holderness Coast, NE England |
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Authors: | R Newsham P S Balson D G Tragheim A M Denniss |
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Institution: | (1) Information Services, British Geological Survey, Keyworth, NG12 5GG Nottingham, UK;(2) Geophysics & Marine Geoscience, British Geological Survey, Keyworth, NG12 5GG Nottingham, UK;(3) Geospatial Information Systems, British Geological Survey, Keyworth, NG12 5GG Nottingham, UK |
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Abstract: | The rapidly eroding cliffs and foreshore of the Holderness Coast represent one of the largest sources of sediment discharging
in the southern North Sea. For effective coastal management it is important to understand the sediment sources, transport
pathways and depositional sinks. The sediment budget is regarded as one of the key information needs for sustainable planning
and management. In order to quantify the sediment yield from recession of the Holderness Coast, digital photogrammetry has
been used, together with nearshore bathymetric survey data, to produce a single DTM for a length of over 52 km of coastline.
Other data including geological sections, sediment lithology, recession rates and the location of coastal defences have been
added to the DTM to create a GIS for the Holderness Coast. The GIS has been used to predict the volume and nature of the sediment
yield assuming that historical recession rates continue. The GIS can also be used to predict future yields using assumptions
of accelerated recession or the implications of arrested retreat due to construction of defences. |
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Keywords: | Bathymetry Aerial photography Digital Terrain Model Erosion Humber Sedimentation |
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