Sediment sources and transport pathways in a rural catchment, Herefordshire, UK
- 26 August 2003
- journal article
- research article
- Published by Wiley in Hydrological Processes
- Vol. 17 (13) , 2665-2681
- https://doi.org/10.1002/hyp.1296
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 thatc. 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 ofc. 43% andc. 27% were estimated from a combined (subsoil and channel bank) subsurface source, and a combined (arable and grassland) topsoil source, respectively. Copyright © 2003 John Wiley & Sons, Ltd.Keywords
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