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Online Training Geohazards: Periglacial hazards plus London drift filled hollows

09 February 2021
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Event type:
Contributes to CPD, Lecture
Organised by:
Geological Society Events
Virtual event
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CPD Geohazards Lecture Series presents Periglacial hazards and London drift filled hollows by Dr. Paul Fish

Start time: 17.00 hrs

Almost all areas of the United Kingdom (UK) have been affected by periglaciation during the Quaternary and as such, relict periglacial geohazards can be a significant technical and commercial risk for many civil engineering projects. This talk describes the processes and products associated with periglaciation in the relict periglacial landscape of the UK, as discussed by Berry et al. (2020). Periglacial features are addressed in terms of their nature and distribution, the hazards they pose to engineering projects, and how they might be monitored and mitigated. The periglacial landsystems classification proposed by Murton and Ballantyne (2017) is applied to show its application to the assessment of ground engineering hazards within upland and lowland periglacial geomorphological terrains. Techniques for the early identification of the susceptibility of a site to periglacial geohazards are discussed. These include the increasingly easy availability of high resolution aerial imagery such as Google Earth that has proved a valuable tool in periglacial geohazard identification when considered in conjunction with the more usual sources of desk study information such as geological, geomorphological and topographical reference material. Descriptions of periglacial geohazards and how they might impact engineering works are presented along with suggestions for possible monitoring and remediation strategies. Drift-filled hollows, which are often considered to be periglacial in origin, are also specifically addressed.

Speaker- Paul Fish

Dr Paul Fish is a geomorphologist and Quaternary geologist working in Jacobs’ ground engineering team. He has over 18 years’ experience in engineering ground models and the investigation and mitigation of geohazard risk gained from projects around the world. He uses his knowledge of Quaternary geology to show how the legacy of glacial and periglacial sediments, landforms and processes can impact engineering geology and geotechnical risk. With colleagues from industry, academia, the BGS and the Geological Society, he has recently launched the Engineering Group of the Quaternary Research Association (QRA) to facilitate knowledge-sharing between Quaternary geology and engineering geology communities.