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| Titel |
Trends and seasonality in stream water chemistry in two moorland catchments of the Upper River Wye, Plynlimon |
| VerfasserIn |
B. Reynolds, M. Renshaw, T. H. Sparks, S. Crane, S. Hughes, S. A. Brittain, V. H. Kennedy |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1027-5606
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| Digitales Dokument |
URL |
| Erschienen |
In: Hydrology and Earth System Sciences ; 1, no. 3 ; Nr. 1, no. 3, S.571-581 |
| Datensatznummer |
250000200
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| Publikation (Nr.) |
 copernicus.org/hess-1-571-1997.pdf |
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| Zusammenfassung |
| Stream water chemistry in the Cyff and Gwy subcatchments
within the headwaters of the River Wye has been monitored regularly since
1980. In the Gwy, which is a predominantly semi-natural grassland catchment,
land use has remained relatively static over the monitoring period, whilst
the Cyff catchment is more buffered because of base cation inputs from
agricultural improvement and ground water sources. Using a variety of statistical
techniques, the long-term data are examined for evidence of trends after
eliminating seasonal effects. The results highlight some of the difficulties
associated with the analysis of longterm water quality data which show
considerable variability over a variety of timescales. Some of this variability
can be explained in terms of hydrochemical responses to climatic extremes
and episodic events such as large atmospheric inputs of seasalts. The long-term
fluctuations in solute concentration underline the continuing need for
maintaining consistent long-term monitoring at sensitive upland sites if
underlying trends related to gradual changes in pollutant deposition or
climate are to be detected with any certainty. |
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