Running sand

Running sand map

Some rocks can contain loosely-packed sandy layers that can become fluidised by water flowing through them. Such sands can 'run', removing support from overlying buildings and causing potential damage.

Running sand hazards can occur where excavations in the sand go below the water table, where springs occur at the base of sand outcrops, around leaking drains or mains water supply pipes or in entire sand bodies if vibrated (liquefaction) e.g. by an earthquake.

A property affected by running sand may experience the following problems:

  • access paths and roads may be broken and disrupted
  • service connections to water, gas and electricity supplies may break
  • structural damage to foundations and to the fabric of the building if uneven sinking occurs under the foundations

The potential for running sand 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 scientific and engineering reports. The detailed digital data illustrated in the map are available as attributed vector polygons, as raster grids and in spreadsheet format.



You may also be interested in...

  • I have received a hazard rating from the BGS and would like more information
  • Buy a GeoReport giving details of six ground stability issues for a particular area or property
  • Apply for a digital data licence for GeoSure data sets from our IPR Section
  • Contact Enquiries for more information on the GeoSure data sets and reports
Hutton field: well correlation diagram.