Sediment sources and transport pathways in a rural catchment, Herefordshire, UK

K.E. Gruszowski, I.D.L. Foster, J.A. Lees, S.M. Charlesworth

Research output: Contribution to journalArticlepeer-review

117 Citations (Scopus)

Abstract

The relative significance of primary and secondary suspended sediment sources has been identified in a small (15 km2) agricultural catchment through the application of a linear unmixing model using mineral magnetic, geochemical and radionuclide signatures of fine sediments. Roads appear to be important as a secondary source of suspended sediment and in the conveyance of topsoils to the river channel. Roads also alter the source signatures of sediment in transport, especially that derived from agricultural topsoils. Modelling suggests that c. 30% of the suspended sediment collected from suspended sediment traps in the River Leadon were derived from, or transported via, roads. Relative contributions from primary sources of c. 43% and c. 27% were estimated from a combined (subsoil and channel bank) subsurface source, and a combined (arable and grassland) topsoil source, respectively.
Original languageEnglish
Pages (from-to)2665-2681
Number of pages17
JournalHydrological Processes
Volume17
Issue number13
Early online date26 Aug 2003
DOIs
Publication statusPublished - Sept 2003

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