Water chemistry of combined surface and subsurface runoff from the North Wyke Farm Platform, with hydrologically isolated catchments sown with different pasture types.

This dataset comprises a number of measurements of water chemistry and water quality taken from the North Wyke Farm Platform (NWFP, Devon, UK) between October 2012 and April 2018. The dataset is an amalgamation of data from a number of experimental campaigns, where water samples from the combined surface and subsurface runoff from hydrologically isolated fields under different pasture types were collected and analysed in the laboratory for water quality measurements. These measurements include dissolved total organic carbon and non-purgeable organic carbon; ammonium, total nitrogen and total oxidisable nitrogen; total and reactive phosphorus; and suspended sediment. Note that this is not a continuous dataset and that not all studies measured the same parameters. Information on sample numbers, dates and laboratory water quality measurements made are given in Summary_of_available_data.csv.

The NWFP measures water quality parameters in-situ at water flumes for each of its 15 catchments, in addition to water discharge rate. Environmental measurements such as precipitation and soil moisture at each catchment’s centre are also measured. In-situ flume measurements have been taken at 15-minute intervals continuously since 2012 and are openly available via the NWFP data portal. Such in-situ (proxy) measurements deemed to be most complementary to the laboratory measurements are also provided in the amalgamated dataset, at the 15-minute interval closest to the physical collection of the water for laboratory analysis. Further data and background information are available online, see the related outputs for more information. It is anticipated that this dataset may be used to compare in-situ proxies with laboratory measurements (for example, turbidity and suspended sediment) or for the comparison of in-situ and laboratory measurements of the same analyte.