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

โœ Scribed by K. E. Gruszowski; I. D. L. Foster; J. A. Lees; S. M. Charlesworth

Book ID
102261763
Publisher
John Wiley and Sons
Year
2003
Tongue
English
Weight
253 KB
Volume
17
Category
Article
ISSN
0885-6087

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โœฆ Synopsis

Abstract

The relative significance of primary and secondary suspended sediment sources has been identified in a small (15 km^2^) 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. Copyright ยฉ 2003 John Wiley & Sons, Ltd.

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