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- Title
Controls on the chemistry of runoff from an upland peat catchment.
- Authors
Fred Worrall; Tim Burt; John Adamson
- Abstract
This study uses 2 years of data from a detailed weekly water sampling programme in a 11·4 km2 upland peat catchment in the Northern Pennines, UK. The sampling comprised precipitation, soil-water samples and a number of streams, including the basin outlet. Samples were analysed for: pH, conductivity, alkalinity, Na, K, Ca, Mg, Fe, Al, Total N, SO4, Cl and colour. Principal component analysis (PCA) was used to identify end-members and compositional trends in order to identify controls on the development of water composition. The study showed that the direct use of PCA had several advantages over the use of end-member mixing analysis (EMMA) as it combines an analysis of mixing and evolving waters without the assumption of having to know the compositional sources of the water. In its application to an upland peat catchment, the study supports the view that shallow throughflow at the catotelm/acrotelm boundary is responsible for storm runoff generation and shows that baseflow is controlled by cation exchange in the catotelm and mixing with a base-rich groundwater. Copyright © 2003 John Wiley & Sons, Ltd.
- Subjects
UNITED Kingdom; RUNOFF; PEATLANDS; WETLANDS
- Publication
Hydrological Processes, 2003, Vol 17, Issue 10, p2063
- ISSN
0885-6087
- Publication type
Article
- DOI
10.1002/hyp.1244