Yew Tree Farm

The Yew Tree Farm borehole is used to monitor groundwater levels in the Permo-Triassic Sandstones of Lancashire.

Our enquiries service can help you to access groundwater level data for this well.

Hydrograph

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Information about the well

Yew Tree Farm
Wellmaster ID	SD41/32
NGR	3440, 4116
Datum	23.69 maod
Monitoring details
Type	Groundwater Level
Aquifer	Permo-Triassic Sandstone
Confinement	Confined
Depth	58 m
Record
Monitored by	EA North West
Records commence	1973
Records end	Active

Hydrogeological setting

The borehole measures groundwater levels in the Permo-Triassic sandstones of Lancashire.

The borehole penetrates the Ormskirk Sandstone Formation, overlain by 18 metres of Till deposits. The Till acts as a confining layer, and observed levels tend to stand within the Till.

Well or borehole construction

203 mm diameter borehole reducing to 150 mm diameter at depth.

Hydrograph response

The hydrograph has an annual sinusoidal pattern, with short term responses to annual recharge events. These have been superimposed, since the early 1990s on a rising trend - prior to the 1990s levels were stable.

Annual fluctuations are generally less than 0.5 metres, although occasional variations of a metre have been observed.

References

A preliminary risk assessment of the potential for groundwater flooding during the winter of 2007/8 - an update.

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).