Multi-sensor laser scan survey techniques for coastal landslide and chalk cliff monitoring and analysis at Folkestone Warren

This paper outlines the history of Folkestone Warren in respect of its geology and geomorphology and the ongoing impact that landslide movements and chalk falls have on the operation of the Folkestone to Dover railway line that crosses the landslide. The influence that the disposition of chalk within the landslide has on the movement and drainage measures is also considered.

The history of surveying and engineering measures installed on the Warren to stabilise the slip will be reviewed. Details will be provided into the recent introduction of laser scanning for the capture of detailed 3D data and the subsequent analysis of that data within a 3D environment and the introduction of spherical photography for recording a detailed visual information of movements within the Warren. The paper will conclude with a review of the data delivery platform and the use of GIS to integrate the precise point monitoring, laser scanning, spherical photography, geotechnical instrumentation and asset information and reporting associated with The Warren into a single portal to provide a management tool for the site.