TECHNICAL NOTE | Learning lessons from historical landsliding in Wales By Dr Tom St John and Dafydd Tudor, Mott MacDonald Understanding historical landslide occurrence, distribution and impacts can help to inform modern risk mitigation strategies. Wales has a moderate to high landslide susceptibility (Wilde et al, 2018) with around 2,800 landslides recorded by the British Geological Survey. Research into landslides in South Wales commenced in around 1916 (Bentley and Siddle, 1996) and the South Wales Coalfield Landslip Survey (Conway et al, 1980) was the first major inventory collection. Landslides occurring from the mid-1900s onwards are well studied and reported; however, there is highly limited discussion of events in the 1800s and early 1900s. The Aberfan flowslide disaster in 1966, during which 144 people died, serves as a stark reminder of the devasting impact landslides can have. Landslides continue to cause adverse impacts in Wales, so there is value in understanding historical landsliding. By reviewing the National Library of Wales’ (NLW’s) recently digitised catalogue of more than 15M historical newspaper articles, it was possible to compile a database of more than 500 unique landslide events for the years 1836 to 1919. The mass movements were catalogued and geolocated with extent and timing information as well as failure mode, impacts, antecedent weather and trigger mechanisms. A wide range of transport infrastructure, commercial activities and residential buildings was found to have been impacted, with 119 fatalities identified. #technicalnote #landslides #wales #historical #data #lessons
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Graduate Geotechnical Engineer at WSP | GradIEAust | Master in Civil Engineering | Swinburne University of Technology | B.Tech(Civil) University Gold Medalist.
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