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Hydrology and Earth System Sciences An interactive open-access journal of the European Geosciences Union
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Volume 1, issue 3
Hydrol. Earth Syst. Sci., 1, 743–753, 1997
https://doi.org/10.5194/hess-1-743-1997
© Author(s) 1997. This work is licensed under
the Creative Commons Attribution-NonCommercial-ShareAlike 2.5 License.
Hydrol. Earth Syst. Sci., 1, 743–753, 1997
https://doi.org/10.5194/hess-1-743-1997
© Author(s) 1997. This work is licensed under
the Creative Commons Attribution-NonCommercial-ShareAlike 2.5 License.

  30 Sep 1997

30 Sep 1997

A view of water quality from the Plynlimon watershed

C. Neal C. Neal
  • Institute of Hydrology, Maclean Building, Crowmarsh Gifford, Wallingford, UK.

Abstract. A summary of hydrochemical research in the Plynlimon catchments from 1983 to the present is related to identifying water flow pathways within catchments and the modelling of soil and stream water acidification. The study reveals a highly heterogeneous system that barely conforms with current understanding of hydrology and acidification theory. The role of hydrochemical mixing processes and groundwater flow routing is emphasised as is the need for maintaining long term monitoring studies and enhancing process based studies of water and chemical fluxes through catchments. The applicability of current environmental impact models for predictive and environmental management purposes is questioned and it is proposed that new hydrochemical modelling structures are needed to examine the highly heterogeneous systems being modelled.

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