The BGS hosts one of the largest concentrations of landslide experts in the UK. Our researchers are involved in many aspects of landslide research with the primary objective of building resilience both in the UK and internationally. This research is funded through commercial, grant funded and public science role projects and is published in reports, web pages and peer-reviewed publications.
Trigger threshold values (TTVs) are measurements of the process intensities that drive a geohazard. For example, this might be the magnitude of an earthquake that triggers landslides in areas of earthquake-induced landsliding.
Earthquake-triggered landslides are relatively rare in the UK, where the key trigger for landsliding is rainfall. Determining the TTV for rainfall-induced landslides is challenging because the TTV varies with the type of soil, which may bring forth the effect of antecedent conditions, i.e. the soil moisture conditions prior to an event.
TTVs also vary with rainfall intensity. Our researchers investigate TTVs in a variety of ways that primarily reflect data availability:
- analysis of historic landslide events in the context of the associated weather conditions (antecedent and event-day precipitation) leading to the event trigger
- statistical methods are applied at a range of scales. At a coarse level, we provide a monthly analysis of landslides and rainfall
- deterministic analyses of antecedent soil moisture conditions considering soil properties (porosity; saturated coefficient of permeability; soil water characteristics curve) in the context of observed and forecasted meteorological conditions
- analysis of analogues for soil moisture, such as electrical resistivity (e.g. PRIME) and meteorological conditions
LANDSLIP is funded by the UK Natural Environment Research Council (NERC) and the Department for International Development (DFID) Science for Humanitarian Emergencies and Resilience programme, which aims to support improved disaster resilience and humanitarian response by advancing monitoring, assessment and modelling for the prediction of natural hazards and risks in India.
This research is focused on the landslide processes associated with coastal erosion and it is focused on coastal landslide observatories, including ones at Aldbrough in Yorkshire and Barton on Sea in Hampshire.
Our hazard and resilience modellers use a range of techniques that reflect the scale of modelling (national to site scale), the style of landslides and the availability of data. Methods include heuristic, statistical and deterministic approaches. Susceptibility and impact modelling is largely GIS hosted and is ultimately aimed at risk minimisation and resilience building.
For more information please contact Vanessa Banks.
Find out more about our landslides research
Report a landslide
Please tell us about any British landslides you may have seen on TV, heard about on the radio, read in newspapers etc.
Landslide Assessment Report
This report is for people who are carrying out preliminary site assessments or who have a general interest in the landslides of a particular area
Report a landslide
Landslide susceptibility mapping
The potential for landsliding (slope instability) to be a hazard has been assessed using 1:50 000 scale digital maps of superficial and bedrock deposits. These have been combined with information from the BGS National Landslide Database and scientific and engineering reports.