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Riverine Flux of Metals from Historically Mined Orefields in England and Wales

Mayes, W. M.; Potter, H. A. B.; Jarvis, A. P.

Authors

H. A. B. Potter

A. P. Jarvis



Abstract

The flux of metals at the tidal limits of major rivers are an important metric of freshwater contaminant transfer to marine habitats, reported in Northeast Atlantic bordering countries under the 1992 Oslo-Paris (OSPAR) Convention. This paper presents an assessment of long-term OSPAR data for four trace metals (Cd, Cu, Pb, and Zn) using a range of spatial datasets to assess the broad distribution of metal flux and yield across England and Wales. Mine site records and geological and land use data are used to classify river basins into six classes. The bulk of metal flux to seas around England and Wales occurs from catchments containing extensive mineralization and a legacy of metal mining (52 % of the total Zn flux, 47 % of Pb, 39 % of Cu, and 48 % of Cd were associated with mined catchments). Catchment area, metal flux from point mine discharges at source, and extent of mineralization typically accounted most for variation in catchment outlet metal flux in stepwise multiple linear regression (SMLR). There are a number of small mining-impacted rural catchments contributing significant fluxes of metals to coastal waters. Of particular prominence are Restronguet Creek (drainage area 87 km2) in southwest England that discharges 176 t Zn/year and 18 t Cu/year and the Afon Goch Dulas (27 km2) in north Wales, which releases 20 t Zn/year and 9 t Cu/year. Although such exercises cannot directly determine the provenance of metals, comparison with metal release data and a review of catchment-scale studies suggest a critical role of mining-related contaminants in contributing to catchment metal export.

Journal Article Type Article
Publication Date 2013-02
Journal Water, Air, & Soil Pollution
Print ISSN 0049-6979
Electronic ISSN 1573-2932
Publisher Springer Verlag
Peer Reviewed Peer Reviewed
Volume 224
Issue 2
Article Number 1425
APA6 Citation Mayes, W. M., Potter, H. A. B., & Jarvis, A. P. (2013). Riverine Flux of Metals from Historically Mined Orefields in England and Wales. Water, Air, and Soil Pollution, 224(2), https://doi.org/10.1007/s11270-012-1425-9
DOI https://doi.org/10.1007/s11270-012-1425-9
Keywords Ecological Modelling; Environmental Engineering; Pollution; Water Science and Technology; Environmental Chemistry
Publisher URL https://link.springer.com/article/10.1007%2Fs11270-012-1425-9
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