Newbridge

This well is used to measure water levels in the Permo-Triassic sandstone aquifer, north-west of Dumfries.

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Hydrograph

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Information about the well

Newbridge
Wellmaster ID	NX97/39
NGR	2951 5788
Datum	15.7 maod
Monitoring details
Type	Groundwater Level
Aquifer	Permo Triassic Sandstone
Confinement	Unconfined
Depth	28 m
Record
Monitored by	SEPA
Records commence	1993
Records end	Active

Hydrogeological setting

The well is located on Kilblane Sand and Gravel Formation underlain by Locharbriggs Sandstone Formation near its boundary with the Doweel Breccia Formation (both part of the Appleby Group of Permian age). The Locharbriggs Sandstone is likely to be in hydraulic continuity with the overlying superficial deposits.

Well or borehole construction

The original borehole was 26.6 m deep and there is some uncertainty over the bottom diameter. The borehole was later deepened to 28 m and it has been assumed that this is the only part that is 70 mm in diameter; it is possible that the diameter decreases at the base of the casing.

Hydrograph response

The hydrograph exhibits an annual sinusoidal, but somewhat spiky, response with the water level remaining in the cased out superficial deposits section of the borehole. The minimum water level appears to be controlled, possibly by the river level as the borehole is about 210 m south of Cluden Water.

References

The Permian aquifer of Dumfries: groundwater chemistry and age.

Acknowledgements

At a national level, groundwater level monitoring data is collected and managed by the Environment Agency (England), the Scottish Environmental Protection Agency, Natural Resources Wales and the Department of the Environment (Northern Ireland). Access to the data they collect (which includes many monitoring sites beyond those highlighted on these pages) and curate is online in England (DEFRA) and Scotland (SEPA).