Lake catchment based studies of erosion and denudation in the merevale catchment,Warwickshire, U.K. |
| |
| Authors: | I D L Foster J A Dearing A Simpson A D Carter P G Appleby |
| |
| Abstract: | Sediment yields estimated from contemporary stream monitoring of suspended sediment in the Merevale forested catchment, North Warwickshire, were compared with the sediment yield record obtained from analysis of lake sediment in the downstream reservoir. Total sediment volume and mass for nine periods since 1861 were calculated by extrapolation of synchronous levels in 54 cores, identified from magnetic susceptibility and other magnetic measurements, and by using 210Pb and 137Cs analysis to provide an absolute sediment chronology. Sediment yield estimated from the two methods show comparable but low (50-200 kg ha?1 yr?1) levels of sediment loss. While suggesting that lake sediments can be a useful means for extending the period over which contemporary monitoring exists, the study stresses the need for detailed historical records of land use and climate against which long term sediment yield records can be evaluated. |
| |
| Keywords: | Sediment yield Lake sediment Core correlation Magnetic susceptibility 210Pb analysis Deciduous woodland |
|
|
