Format:GIS polygon data. (ESRI, MapInfo, others available by request)
£0.10 per km2. Subject to number of users, licence fee and data preparation fee.
‘Permeability’ refers to whether and how water can flow through a rock. Permeability data is often used in studies of groundwater and in particular during investigations of pollution or aquifer contamination. We have prepared permeability information based on the 1:50 000-scale digital geological map of Great Britain (BGS Geology 50K).
The permeability indices are based on geological considerations:
- the predominant flow mechanism:
- intergranular flow
- fracture flow
- a mixture of intergranular and fracture flow
- a maximum permeability index
- a minimum permeability index
The permeability indices indicate the range of permeability likely to be encountered for each geological unit. The maximum and minimum permeability indices are divided into five classes: very high, high, moderate, low, and very low.