Premium
Sediment sources and transport pathways in a rural catchment, Herefordshire, UK
Author(s) -
Gruszowski K. E.,
Foster I. D. L.,
Lees J. A.,
Charlesworth S. M.
Publication year - 2003
Publication title -
hydrological processes
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.222
H-Index - 161
eISSN - 1099-1085
pISSN - 0885-6087
DOI - 10.1002/hyp.1296
Subject(s) - sediment , topsoil , subsoil , hydrology (agriculture) , environmental science , sediment transport , drainage basin , channel (broadcasting) , arable land , fluvial , geology , bank , structural basin , soil science , agriculture , soil water , geomorphology , ecology , geography , geotechnical engineering , cartography , engineering , biology , electrical engineering
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 © 2003 John Wiley & Sons, Ltd.