Leach, D. et al

Field measurements of alkalinity, chloride-ion, conductivity, pH and nutrients in rivers (2003-2006) [LOCAR]

River water alkalinity, chloride-ion, conductivity, pH and nutrients data from the Frome Piddle; Pang Lambourn and Tern catchments, recorded between 2003 and 2006. River water samples were collected fortnightly at twenty three sites within these catchments and analysed for Alkalinity pH 4.5, Ammonia, Chloride-ion, Conductivity 20 deg C, Nitrate, pH, Phosphorus soluble reactive (SRP), Silicate reactive dissolved (SRD) and Sulphate. The samples were collected as part of the NERC funded Lowland Catchment Research (LOCAR) Programme to provide comparable baseline river water chemistry data across the LOCAR catchments.

Publication date: 2015-11-05

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Format of the dataset : Comma-separated values (CSV)

Access and use conditions

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

You must cite: Leach, D.; Henville, P.; Wyatt, R.; Hewitt, E.; Morrissey, I.; Weller, J.; Tindall, C. I.; Bachiller-Jareno, N. (2015). Field measurements of alkalinity, chloride-ion, conductivity, pH and nutrients in rivers (2003-2006) [LOCAR]. NERC Environmental Information Data Centre. https://doi.org/10.5285/bb600a56-c9cf-4fca-b9be-be3de0039a79


© Centre for Ecology & Hydrology (Natural Environment Research Council)


Study area
Temporal extent
2003-11-06    to    2006-06-14


A single sample from the main flow of the river was collected by the Catchment Service Team in that catchment and used to fill a number of bottles supplied by Thames Water Laboratory. Samples for pH and alkalinity readings were poured in a glass bottle. Samples for Phosphorus soluble reactive were filtered in the field. Unfiltered samples were used for the rest of determinands. Samples were then sent to Thames Water for analysis. They used the Seal discrete analyser to determine values for Alkalinity pH 4.5, Ammonia, Chloride-ion, Nitrate, Phosphorus soluble reactive (SRP), Silicate reactive dissolved (SRD) and Sulphate. pH and Conductivity probes were used for those two determinands. A duplicate and a QC sample were sent each week to Thames Water to compare results obtained by the laboratories. The data were quality controlled by Thames Water. A zip file containing box-and-whisker plots for each determinand, showing the range of values (median, inter-quartile range, 1.5 * inter-quartile range, outliers) recorded at each site is available to enable prospective users of the data to understand data quality.


Leach, D.
Centre for Ecology & Hydrology
Henville, P.
Centre for Ecology & Hydrology
Wyatt, R.
Centre for Ecology & Hydrology
Hewitt, E.
Centre for Ecology & Hydrology
Morrissey, I.
Birmingham University
Weller, J.
Birmingham University
Tindall, C. I.
Centre for Ecology & Hydrology
Bachiller-Jareno, N.
Centre for Ecology & Hydrology

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Point Of Contact
Centre for Ecology & Hydrology
Maclean Building, Benson Lane, Crowmarsh Gifford
OX10 8BB
United Kingdom
Environmental Information Data Centre
NERC Environmental Information Data Centre


Spatial representation type
Tabular (text)
Spatial reference system
OSGB 1936 / British National Grid


Topic categories
Other keywords
Water resources (en)
Rees Section
Discipline keywords
water quality
Theme keywords
Environmental monitoring facilities
Theme keywords
The Lowland Catchment Research Programme

Dataset identifiers



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