Abstract
Sediment yields for two contrasting lake catchments in the English Midlands have been calculated from 1765 to 1982 and 1861 to 1982 respectively. Chemical analysis has been performed on the sediments to examine changes in the concentration and flux of calcium, magnesium, sodium, potassium, iron, manganese, aluminium, copper, nickel, zinc and lead in total digests and extractable calcium, magnesium, sodium, potassium and phosphorus in the same sediments. It is shown that the chemical analyses may be used to interpret and quantify atmospheric pollution, rates of movement and sources of minerogenic sediment and the intensification of land use in an agricultural ecosystem.
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