Superficial hydrogeological domains for the Spittal area - Project Groundwater Northumbria

Burke, H.; Terrington, R.; Reeves, T.; Murphy, B.; Dewald, N.; Banks, V.. 2024 Superficial hydrogeological domains for the Spittal area - Project Groundwater Northumbria. Nottingham, UK, British Geological Survey, 44pp. (Project Groundwater Northumbria series, CR/24/064N) (Unpublished)

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Abstract/Summary

This report has been produced by the British Geological Survey (BGS) on behalf of Project Groundwater Northumbria, the Flood and Coastal Resilience Innovation Programme (FCRIP) project led by Gateshead Council. It provides background and methodological information on the development of superficial hydrogeological domains for the Spittal area (near Berwick Upon Tweed) and accompanies the delivery of datasets including a superficial hydrogeological domains map and a new superficial thickness model for the project area. The development of the domains was undertaken through analysis of 287 boreholes. 271 boreholes were digitally coded boreholes including over 187 coded for this project. The boreholes were attributed for permeability according to previously used schemes and analysed to characterise the vertical succession of superficial deposits for classification as hydrogeological domains. Superficial hydrogeological domains have been mapped for the area based on a schema defined through consultation with the clients and intended for characterisation of both potential recharge to, and discharge from, underlying bedrock aquifers. The domains have been characterised from the superficial thickness model using thickness thresholds as well as the attributed borehole distribution, the 1:50,000 scale geological map of the area and wider geological understanding of the region and associations of deposits. Four primary domains were identified in the Spittal area. Domain 1 comprises areas with less than 2 m of superficial deposits, including areas where no superficial deposits are present. Domain 2 represents areas where only aquifer (permeable deposits) are present, regardless of their thickness. Domain 3 comprises areas with 2-10 m of aquitard deposits (low permeability) within the succession. Domain 3 is divided into three subunits (3a, 3b and 3c) to show differences in the vertical sequence of aquifer and aquitard units. Domain 4 covers areas with 10-30 m of aquitard in the succession. As the borehole data was densely clustered in the north of the respective study area and there was limited borehole data in the central and southern part of the study area, artificial ground was also considered as a major contributor to the make-up of the superficial hydrogeological domains for Spittal. These included mine shafts and former quarries/open cast mines. Future work to improve the understanding of thickness, distribution and type of the superficial deposits using non-intrusive methods such as field survey and geophysical survey (passive seismic methods) would help constrain the superficial hydrogeological domains.

Item Type:	Publication - Report
Funders/Sponsors:	British Geological Survey, Gateshead Council
Additional Information. Not used in RCUK Gateway to Research.:	This item has been internally reviewed, but not externally peer-reviewed. Report made open in September 2024.
Date made live:	30 Sep 2024 15:44 +0 (UTC)
URI:	https://nora.nerc.ac.uk/id/eprint/538119

Item Type:

Publication - Report

Funders/Sponsors:

British Geological Survey, Gateshead Council

Additional Information. Not used in RCUK Gateway to Research.:

This item has been internally reviewed, but not externally peer-reviewed. Report made open in September 2024.

Date made live:

30 Sep 2024 15:44 +0 (UTC)

URI:

https://nora.nerc.ac.uk/id/eprint/538119