BGS GeoSure Debris Flow

BGS Datasets

Key information

1:50 000
Great Britain
GIS grid data (ESRI and ASCII grid; others available by request)

Data now available for evaluation/beta testing

Local-level use

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Free access

Our free data is available under the Open Government Licence.  Please acknowledge reproduced BGS materials.

Sample maps
Supporting documents

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. They 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.

Debris flows are potentially very destructive and, due to the speed at which they take place, can for example rapidly block infrastructure routes such as the Rest and Be Thankful Pass and Glen Ogle.

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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For more information about our datasets, technologies and map viewers please contact us

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