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Gamma-emitting radionuclides and metallic elements in urban dusts and sediments, Coventry, UK: implications of dosages for dispersal and disposal

Charlesworth, S.M. and Foster, Ian D.L. (2005) Gamma-emitting radionuclides and metallic elements in urban dusts and sediments, Coventry, UK: implications of dosages for dispersal and disposal. Mineralogical Magazine, 69 (5). pp. 759-767. ISSN 0026-461X

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Official URL: http://dx.doi.org/10.1180/0026461056950286

Abstract

This paper investigates temporal variations in fluxes of peat and other sediment in the catchment of March Haigh Reservoir, West Yorkshire. Long-term estimates of sediment yield were derived from a study of reservoir sediments. Magnetic properties were used to correlate ten cores to a master profile dated using 210Pb and 137Cs. A 14C date suggests that most of the organic component of the sediment is allochthonous and derived from peat eroded from the catchment. Organic sediment yields suggest low catchment erosion rates between 1838 and 1963. Blanket peat erosion increased significantly after 1963, and peaked between 1976 and 1984. Estimates of total sediment yield range between 2 and 28 t km-2 a-1. These yields are significantly lower than those from some previous studies examining reservoir sedimentation in other blanket peat-covered catchments. The low yield estimates may be due to relatively low rates of erosion in the basin, but may also be partly explained by maintenance of silt traps during the early life of the reservoir and removal of sediment by scouring. Sedimentation within the reservoir is spatially variable, and bathymetry and sediment source appear to be the dominant controls on sedimentation patterns within the reservoir.

Item Type:Article
Research Community:University of Westminster > Life Sciences, School of
ID Code:6072
Deposited On:19 Feb 2009 15:10
Last Modified:16 Dec 2009 12:39

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