Groundwater levels data for the CEH River Lambourn Observatory at Boxford (01/02/2012 to 16/01/2015)

This dataset contains logged and manual observations of groundwater levels for piezometers at the Centre for Ecology & Hydrology (CEH) River Lambourn Observatory wetlands at Boxford, Berkshire, for the period February 1 2012 to January 16 2015 (01/02/2012 to 16/01/2015). The CEH River Lambourn Observatory located in Berkshire, UK (51.445o N 1.384o W) comprises c. 10 ha of riparian wetland which is bordered to the east by a 600 m stretch of the River Lambourn. The subsurface architecture comprises bedrock Chalk, overlain by gravels and then peat. Also presented are datums and ground levels for each piezometer, with data available for groundwater levels in peat, gravels and chalk. Groundwater heads were routinely checked at all piezometers by manually dipping observed water levels. At selected piezometers groundwater heads were monitored every 15 minutes using pressure transducers. Piezometers were not anchored to bedrock, though piezometer datum movement due to peat compressibility with saturation was discounted after comparisons of level surveys. Full details about this dataset can be found at https://doi.org/10.5285/f4b8ca09-31a7-4f20-9fc1-eb35744e28d6

Date (Publication): 2016-10-19

Date (Creation): 2016-05-18

Identifier: https://catalogue.ceh.ac.uk/id/f4b8ca09-31a7-4f20-9fc1-eb35744e28d6

Identifier: doi: / 10.5285/f4b8ca09-31a7-4f20-9fc1-eb35744e28d6

Other citation details: House, A.R., Roberts, C., Stratford, C.J., Old, G.H., Hewitt, E.J., Bell, R., Manamsa, K., Woods, I., Williams, P., Townsend, J., Sorensen, J., Thompson, J. (2016). Groundwater levels data for the CEH River Lambourn Observatory at Boxford (01/02/2012 to 16/01/2015). NERC Environmental Information Data Centre 10.5285/f4b8ca09-31a7-4f20-9fc1-eb35744e28d6

Author

Centre for Ecology & Hydrology - House, A.R.

Author

Centre for Ecology & Hydrology - Roberts, C.

Author

Centre for Ecology & Hydrology - Stratford, C.J.

Author

Centre for Ecology & Hydrology - Old, G.H.

Author

Centre for Ecology & Hydrology - Hewitt, E.J.

Author

British Geological Survey - Bell, R.

Author

British Geological Survey - Manamsa, K.

Author

British Geological Survey - Woods, I.

Author

British Geological Survey - Williams, P.

Author

British Geological Survey - Townsend, J.

Author

British Geological Survey - Sorensen, J.

Author

University College London - Thompson, J.

Publisher

NERC Environmental Information Data Centre

Point of contact

UK Centre for Ecology & Hydrology - Dr. Gareth Old

Custodian

NERC EDS Environmental Information Data Centre

Owner

UK Centre for Ecology & Hydrology

Maintenance and update frequency: notPlanned Not planned

GEMET - INSPIRE themes, version 1.0

Hydrography

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Other constraints: This resource is made available under the terms of the Open Government Licence

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Other constraints: © UK Centre for Ecology & Hydrology

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Other constraints: If you reuse this data, you should cite: House, A.R., Roberts, C., Stratford, C.J., Old, G.H., Hewitt, E.J., Bell, R., Manamsa, K., Woods, I., Williams, P., Townsend, J., Sorensen, J., Thompson, J. (2016). Groundwater levels data for the CEH River Lambourn Observatory at Boxford (01/02/2012 to 16/01/2015). NERC Environmental Information Data Centre https://doi.org/10.5285/f4b8ca09-31a7-4f20-9fc1-eb35744e28d6

Spatial representation type: textTable Text, table

Metadata language: EnglishEnglish

Character set: utf8 UTF8

Topic category

Environment
Inland waters
Elevation
Geoscientific information

Begin date: 2012-02-01

End date: 2015-01-16

Unique resource identifier: OSGB 1936 / British National Grid

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Comma-separated values (CSV) ()

Distributor

NERC EDS Environmental Information Data Centre

Maclean Building, Benson Lane, Crowmarsh Gifford , Wallingford , Oxfordshire , OX10 8BB , UK

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Conformance result

Date (Publication): 2010-12-08

Statement: An existing gridded piezometer array originally installed by CEH in February 2012 was numbered 1-15. Supplemental piezometers to the same design specification were added in May 2013 to target observed temperature anomalies (locations 16-21). All locations comprise separate peat (P) and gravel (G) piezometers, with the exception of location 8 where the peat was too thin to complete an installation. Gravel piezometers were screened approximately 2.5-3.5 m below ground level (bgl) while peat piezometers were screened across the entire peat thickness. Peat piezometers in the pre-existing array were installed with the slotted screen extending above ground level, while bentonite was used to seal new piezometers with closed screens above ground level. Chalk (C) boreholes are also located at sites 3, 22 and 23; these were screened at 9.5-10.0, 8.0-9.0 and 5.0-6.0 m bgl, respectively. At selected piezometers groundwater heads were monitored every 15 minutes using either In-Situ Level Troll 500sTM or SWS DiversTM installed to a consistent depth of 3 m bgl in gravel piezometers and to the base of the peat in peat piezometers. Groundwater heads were routinely checked at all piezometers by manually dipping observed water levels to quality control logged data susceptible to drift. Piezometers were not anchored to bedrock, with the possible consequence that datums for water levels, taken at the top of piezometers, could move with the expansion and contraction of the peat due to saturation. Though it has been suggested that shallow (<0.5 m) peat generally possesses low compressibility, piezometer elevations were surveyed at periods of low (November 2013) and high (April 2014) water table level to ascertain any vertical movement. Surveys were carried out using Trimble 5600 DRTM total station and Trimble R8TM differential GPS (dGPS). Three total station setups were positioned with dGPS based on line of sight to fixed benchmark points, and to enable best coverage. Selected piezometers were included in the surveys based on line of sight to total station setups. Results from the surveys showed differences could be grouped dependent on instrument setup. Mean differences for setups 1, 2, and 3 were 0.019, 0.000 and 0.006 m, respectively, which indicate systematic error and are likely due to inaccuracies in the Trimble R8TM GPS receiver due to obstructions, satellite geometry or atmospheric conditions. Variance around the means was not more than 0.003 m, within the accuracy for the Trimble 5600 DRTM total station. Hence, piezometer movement due to peat compressibility with saturation was discounted.

File identifier: f4b8ca09-31a7-4f20-9fc1-eb35744e28d6 XML

Metadata language: EnglishEnglish

Character set: ISO/IEC 8859-1 (also known as Latin 1) 8859 Part 1

Hierarchy level: dataset Dataset

Hierarchy level name: dataset

Date stamp: 2024-02-12T17:59:42

Metadata standard name: UK GEMINI

Metadata standard version: 2.3

Point of contact

NERC EDS Environmental Information Data Centre

Lancaster Environment Centre, Library Avenue, Bailrigg , Lancaster , LA1 4AP , UK

https://eidc.ac.uk/

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