Halcrow, Coastal Studies Forward Programme Data Compilation ...

3 Coastal Monitoring3.1 Baseline surveyThe baseline survey of the coastline from St Bees Head to Ravenglass wasundertaken in May 2002, extending one kilometre inland and five kilometresoffshore. This provided the first high resolution data for the area and provides afixed datum to compare historical data and future surveys. The baseline surveycomprised:setup of a GPS control network to ensure accuracy of survey componentsan aerial survey comprising simultaneous collection of 2m resolutionLiDAR data and 25cm resolution digital aerial imagerysingle beam echo sounder bathymetry survey to 5km offshorea shoreline RTK topographic survey of the intertidal zonea sediment sampling survey of the beach and offshore areameasurement of current strength and direction using three AcousticDoppler Current Profilers (ADCPs) deployed along the coast.The details of the baseline survey are documented in Halcrow (2002c). Analysis ofbaseline survey data are presented in Halcrow (2003b). The baseline survey data(raw ASCII format and processed to ArcView GRID format) have been providedseparately to the LLWR on an external hard drive.3.2 Annual monitoring – repeat LiDAR surveysSubsequent to the baseline survey, 2m resolution LiDAR data has been capturedon an annual to biannual basis. LiDAR was captured by aerial surveys in December2004 the Environment Agency (EA) and in February 2006 by Blom (formerlySimmons Aerofilms). A terrestrial laser scanning survey of the foreshore wasundertaken by Halcrow in the winter of 2003/04.In March 2009, high resolution 0.5m LiDAR data was collected by the EA’sGeomatics Group. All surveys cover the coastline between St Bees Head and theEsk Estuary mouth. All data were assessed for error, rectified accordingly and usedto generate Digital Elevation Models (DEM) of difference and beach volumes.Survey and analysis results have been provided separately.Doc No 1 Rev 2: Date: May 2010 24