Rowntree, K. M., Foster, I. D. L., Mighall, T. M., Van der Vaal, B., Du Preez, I. and Boardman, J. (2008) Post-European settlement impacts on erosion and land degradation; a case study using farm reservoir sedimentation in the Eastern Cape, South Africa. In: Schmidt, J. (ed.) Sediment Dynamics in Changing Environments. International Association of Hydrological Sciences Press. 9781901502848. pp. 139-142.
| Item Type: | Conference Proceedings |
|---|---|
| Abstract: | We present data from a farm reservoir constructed in 1843, which retains a complete and undisturbed sedimentary record exceeding 4 m in depth. A small number (27) of potential sediment sources were sampled and characterised by their mineral magnetic fingerprints. Similar signatures were measured on the reservoir sediments. While yet to be dated, analysis of mineral magnetic properties of the reservoir sediments suggest that they contain significant quantities of super-paramagnetic minerals produced by pedogenesis, but are not strongly overprinted by magnetic signatures that could be attributed to bacterial magnetite or greigite produced within the reservoir. Preliminary results from the source tracing show that the sediments are probably derived from colluvial topsoils punctuated by inputs from river channels or badlands |
| Uncontrolled Keywords: | sediment sources; environmental magnetism; gamma-emitting radionuclides; Karoo; South Africa |
| Subjects: |
Q Science > QE Geology > QE500 Dynamic and structural geology > QE570 Weathering. Erosion G Geography. Anthropology. Recreation > GB Physical geography > GB400 Geomorphology. Landforms. Terrain > GB440.S6 Geomorphology of South Africa Q Science > QE Geology > QE500 Dynamic and structural geology > QE571 Sedimentation and deposition |
| Creators: | Rowntree, Kate M, Foster, Ian D L, Mighall, T M, Van der Vaal, B, Du Preez, I and Boardman, John |
| Editors: | Schmidt, Jochen |
| Publisher: | International Association of Hydrological Sciences Press |
| Faculties, Divisions and Institutes: | University Faculties, Divisions and Research Centres - OLD > School of Applied Sciences (to 2009) > Environmental Science (to 2009) |
| Date: | 2008 |
| Date Type: | Publication |
| Page Range: | pp. 139-142 |
| Title of Book: | Sediment Dynamics in Changing Environments |
| Event Title: | International Commission on Continental Erosion/International Association of Hydrological Sciences (ICCE/IAHS) Symposium ‘Sediment Dynamics in Changing Environments’ |
| Event Dates: | 1-5 December 2008 |
| Event Location: | Christchurch, New Zealand |
| Event Type: | Conference |
| Language: | English |
| ISBN: | 9781901502848 |
| Status: | Published / Disseminated |
| URI: | http://nectar.northampton.ac.uk/id/eprint/1863 |
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