Premium
Identification of suspended sediment sources by means of magnetic measurements: Some preliminary results
Author(s) -
Oldfield F.,
Rummery T. A.,
Thompson R.,
Walling D. E.
Publication year - 1979
Publication title -
water resources research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.863
H-Index - 217
eISSN - 1944-7973
pISSN - 0043-1397
DOI - 10.1029/wr015i002p00211
Subject(s) - remanence , geology , saturation (graph theory) , topsoil , sediment , bedrock , coercivity , soil water , soil science , hydrology (agriculture) , interflow , geomorphology , magnetization , geotechnical engineering , magnetic field , groundwater , physics , mathematics , condensed matter physics , combinatorics , quantum mechanics
Rapid, nondestructive magnetic measurements of initial low‐field susceptibility x , saturation isothermal remanent magnetization (IRM sat ), and coercivity of IRM provide a means of identifying the source of suspended sediments in rivers. Preliminary results derived from the application of these measurements both to suspended sediment and to potential sources within the instrumented catchment of the Jackmoor Brook near Exeter, United Kingdom, demonstrate the value of this approach in an area of Permian sandstone bedrock where the contrast in magnetic properties between parent material and topsoil is easily characterized. High flows are shown to be associated with suspended sediment, the magnetic properties of which are indistinguishable from those of the cultivated soils of the catchment.