Grimes Graves

The well at Grimes Graves is used to measure water levels in the unconfined Chalk aquifer to the north-west of Thetford, Norfolk.

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

Hydrograph

Records for this site end in 2008.

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Information about the well

Grimes Graves
Wellmaster ID	TL89/37
NGR	5817 2900
Datum	17.22 m AOD
Monitoring details
Type	Groundwater Level
Aquifer	Chalk
Confinement	Unconfined
Depth	26 m
Record
Monitored by	EA Anglian
Records commence	1971
Records end	2008

Hydrogeological setting

The site lies on the margin of the cover sand and a very small thickness of this deposit may be present above the Chalk. The borehole penetrates the New Pit Chalk Formation. The Chalk aquifer is unconfined at this site.

Well or borehole construction

The borehole was drilled at 120 mm diameter. It is not recorded as having any casing, though there is likely to be at least a short section at the surface.

Hydrograph response

Unconfined Chalk with hydrograph exhibiting an annual sinusoidal response.

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).