Articles | Volume 23, issue 10
Hydrol. Earth Syst. Sci., 23, 4367–4388, 2019
https://doi.org/10.5194/hess-23-4367-2019
Hydrol. Earth Syst. Sci., 23, 4367–4388, 2019
https://doi.org/10.5194/hess-23-4367-2019

Research article 28 Oct 2019

Research article | 28 Oct 2019

New water fractions and transit time distributions at Plynlimon, Wales, estimated from stable water isotopes in precipitation and streamflow

Julia L. A. Knapp et al.

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Cited articles

Bastviken, D., Thomsen, F., Svensson, T., Karlsson, S., Sandén, P., Shaw, G., Matucha, M., and Öberg, G.: Chloride retention in forest soil by microbial uptake and by natural chlorination of organic matter, Geochim. Cosmochim. Ac., 71, 3182–3192, https://doi.org/10.1016/j.gca.2007.04.028, 2007. 
Benettin, P., Kirchner, J. W., Rinaldo, A., and Botter, G.: Modeling chloride transport using travel time distributions at Plynlimon, Wales, Water Resour. Res., 51, 3259–3276, https://doi.org/10.1002/2014WR016600, 2015. 
Campbell, J., and Green, M.: Water isotope samples from Watershed 3 at Hubbard Brook Experimental Forest, 2006-2010, Environmental Data Initiative, https://doi.org/10.6073/pasta/f5740876b68ec42b695c39d8ad790cee, 2019. 
Casper, M. C., Volkmann, H. N., Waldenmeyer, G., and Plate, E. J.: The separation of flow pathways in a sandstone catchment of the Northern Black Forest using DOC and a nested approach, Phys. Chem. Earth, 28, 269–275, https://doi.org/10.1016/S1474-7065(03)00037-8, 2003. 
CEH: National River Flow Archive, Natural Environment Research Council – Center for Ecology & Hydrology, Wallingford, available at: https://nrfa.ceh.ac.uk, last access: 8 October 2019. 
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Short summary
We describe, present, and make publicly available two extensive data sets of stable water isotopes in streamwater and precipitation at Plynlimon, Wales, consisting of measurements at 7-hourly intervals for 17 months and at weekly intervals for 4.25 years. We use these data to calculate new water fractions and transit time distributions for different discharge rates and seasons, thus quantifying the contribution of recent precipitation to streamflow under different conditions.