Format:GIS grid data (ESRI and ASCII grid; others available by request)
Data now available for evaluation/beta testing
The debris flow landslide layer provides information on the potential of the ground, at a given location, to form a debris flow. It is based on a combination of digital geological, hydrogeological and topographic data. The methodology develops an additional dimension to the BGS GeoSure landslides layer and is designed for users interested specifically in debris flow susceptibility.
The term ‘debris flow’ refers to the rapid, downslope flow of poorly sorted debris mixed with water. These flows are a widespread phenomenon in mountainous terrain and are distinct from other types of landslides as they can occur periodically on established paths, usually gullies and first- or second-order drainage channels.
Debris flows in Great Britain are most commonly found in upland Scotland but also occur in parts of Wales and the Lake District. Find out more about how landslides are classified.
The BGS GeoSure debris flow landslides layer is part of the BGS GeoSure range of natural subsidence products.
Get in touch to evaluate and Beta test the full dataset.
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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.