Plynlimon research catchment hydrochemistry
Cite this dataset as:
Neal, C; Kirchner, J; Reynolds, B (2013). Plynlimon research catchment hydrochemistry. NERC Environmental Information Data Centre. https://doi.org/10.5285/44095e17-43b0-45d4-a781-aab4f72da025
Download/Access
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This dataset is made available under the terms of the Open Government Licence 
https://doi.org/10.5285/44095e17-43b0-45d4-a781-aab4f72da025
This dataset includes rainfall, cloud, river and stream hydro-chemistry of the Plynlimon research catchments. The data is from weekly monitoring of stream hydrochemistry of the River Hafren (Severn) at both the Lower and Upper Hafren site from 1998, stream hydrochemistry of the River Hore at the Lower Hore site from 1983 and Upper Hore site from 1984 as well as rainfall hydrochemistry near the Carreg Wen meteorological site from 1983 and cloud hydrochemistry near the Carreg Wen meteorological site from 1990. Data for over 50 chemical determinands are presented alongside data for some in-situ measurements such as water temperature. Full descriptions of the analytical methods used for each determinand is included. The Plynlimon research catchments lie within the headwaters of the River Severn and the River Wye in the uplands of mid-Wales. Intensive and long-term monitoring within the catchments underpins a wealth of hydrological and hydro-chemical research; other linked datasets include river flow, meteorology and a variety of detailed spatial datasets representing the topography, soils and rivers of the catchments. Monitoring is funded by the Centre for Ecology & Hydrology, and is ongoing since 1968.
Publication date: 2013-02-08
View numbers valid from 01 June 2023 Download numbers valid from 20 June 2024 (information prior to this was not collected)
Format
Comma-separated values (CSV)
Spatial information
Study area
Spatial representation type
Tabular (text)
Spatial reference system
OSGB 1936 / British National Grid
Temporal information
Temporal extent
1983-05-10 to 2008-12-23
Provenance & quality
Originally designed to improve understanding of water use by coniferous forests, monitoring within the Plynlimon research catchments has subsequently developed into a multi-disciplinary project underpinning a wealth of hydrological research. The stream hydrochemistry dataset is a combination of chemical determinands and in-situ physical properties. Samples are taken on an approximately weekly basis and analysed in laboratories for approximately 50 chemical determinands. The laboratory analysis has been undertaken at different locations using different equipment during the years of monitoring represented within the dataset. Details of the analytical methods used for each determinand are included within the dataset. The information provided is presented as raw data which have not been modified to include "less than" values when the numbers are less than the lowest quotable value. This is done so as to allow the data to be used for research purposes including detailed statistical analysis where inclusion of less than values would be problematic. The data are thus "uncensored" for research purposes and include in places values that are negative due to analytical uncertainties and the extremely low concentrations of some of the determinands. The data are provided in good faith with the expectation that they will be used in a positive and constructive manner. It is up to the user to resolve which way to use and interpret the data and information on full methodologies and less than values is provided within the metadata files. We whole heartedly encourage the use of these data for research and educational purposes bearing in mind that it is uncensored data and that over the years research directions have evolved to reflect changing project and funding priorities while analytical methodologies have changed. The data provide a legacy from many years' research involving scientists, analysts and field workers who in many cases have now retired. While we have done our best to provide all the information possible, in many cases it will be not be possible to respond to detailed enquiries about the earlier parts of the record.
Licensing and constraints
This dataset is made available under the terms of the Open Government Licence
Cite this dataset as:
Neal, C; Kirchner, J; Reynolds, B (2013). Plynlimon research catchment hydrochemistry. NERC Environmental Information Data Centre. https://doi.org/10.5285/44095e17-43b0-45d4-a781-aab4f72da025
© UK Centre for Ecology & Hydrology
Related
This dataset is included in the following collections
Citations
Jin, L., Ma, L., Dere, A., White, T., Mathur, R., & Brantley, S.L.(2017). REE mobility and fractionation during shale weathering along a climate gradient. Chemical Geology, 466, 352-379 https://doi.org/10.1016/j.chemgeo.2017.06.024
Halliday, S.J., Skeffington, R.A., Wade, A.J., Neal, C., Reynolds, B., Norris, D., & Kirchner, J.W.(2013). Upland streamwater nitrate dynamics across decadal to sub-daily timescales: a case study of Plynlimon, Wales. Biogeosciences, 10(12), 8013-8038. https://doi.org/10.5194/bg-10-8013-2013
Herndon, E.M., Dere, A.L., Sullivan, P.L., Norris, D., Reynolds, B., & Brantley, S.L. (2015). Landscape heterogeneity drives contrasting concentration–discharge relationships in shale headwater catchments. Hydrology and Earth System Sciences, 19(8), 3333–3347 https://doi.org/10.5194/hess-19-3333-2015
Knapp, J.L.A., Neal, C., Schlumpf, A., Neal, M., & Kirchner, J.W. (2019). New water fractions and transit time distributions at Plynlimon, Wales, estimated from stable water isotopes in precipitation and streamflow. In Hydrology and Earth System Sciences (Vol. 23, Issue 10, pp. 4367–4388). Copernicus GmbH. https://doi.org/10.5194/hess-23-4367-2019
Lee, J., Whitehead, P.G., Futter, M.N., & Hall, J.W. (2020). Impacts of Droughts and Acidic Deposition on Long-Term Surface Water Dissolved Organic Carbon Concentrations in Upland Catchments in Wales. In Frontiers in Environmental Science (Vol. 8). Frontiers Media SA. https://doi.org/10.3389/fenvs.2020.578611
Rücker, Andrea (2019) Tracing snow-hydrological processes in a pre-alpine catchment with stable water isotopes. ETH Zurich https://doi.org/10.3929/ethz-b-000380996
Supplemental information
Neal, C., Reynolds, B., Norris, D., Kirchner, J. W., Neal, M., Rowland, P., Wickham, H., Harman, S., Armstrong, L., Sleep, D., Lawlor, A., Woods, C., Williams, B., Fry, M., Newton, G. and Wright, D. (2011), Three decades of water quality measurements from the Upper Severn experimental catchments at Plynlimon, Wales: an openly accessible data resource for research, modelling, environmental management and education. Hydrol. Process., 25: 3818-3830.
Correspondence/contact details
Norris,D
UK Centre for Ecology & Hydrology
Environment Centre Wales, Deiniol Road
Bangor
Gwynedd
LL57 2UW
UNITED KINGDOM
enquiries@ceh.ac.uk
Bangor
Gwynedd
LL57 2UW
UNITED KINGDOM
Other contacts
Rights holder
UK Centre for Ecology & Hydrology
Custodian
NERC EDS Environmental Information Data Centre
info@eidc.ac.uk
Publisher
NERC Environmental Information Data Centre
info@eidc.ac.uk