About this Environmental Science article

Changing headwater suspended sediment yields in the LOIS catchments over the last century: a paleolimnological approach by I. D. L. Foster; J. A. Lees is a Environmental Science article available to read on EtoBox.

This paper describes the methods used to reconstruct suspended sediment yields over the last century, based on 210 Pb and 137 Cs dated bottom sediments in nine lake and/or reservoir catchments. Magnetic susceptibility and dry bulk density are used to correlate between multiple cores taken from each lake/reservoir basin in order to estimate sediment in ̄ux through time and reconstruct sediment yield histories. The catchments represent a range of morphological and land use systems, including upland moorland, upland forestry and upland and lowland agricultural systems. The reconstruction provides some background information on pre-20th century sediment yields and permits an evaluation of the eect of 20th century land management systems, especially upland aorestation and agriculture, on changing suspended sediment yields. Reconstructed sediment yields over the last century range from c. 7 to 86 t km À2 yr À1 . Average post-1953 yields from pasture, arable, moorland and forested catchments are 13, 31, 29 and 13 t km À2 yr À1 , respectively. The history of human disturbance in individual catchments is clearly recorded in the reconstructed sediment yields. Short-lived disturbance, such as

Author

I. D. L. Foster; J. A. Lees

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Inc.; Wiley (ISSN 0885-6087)

Published

1999

Language

EN

Field

Environmental Science (Physical Sciences)