Soil erosion rates in South Africa compared with cosmogenic 3He-based rates os soil production

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dc.contributor.authorDecker, J E
dc.contributor.authorNiedermann, S
dc.contributor.authorDe Wit, M J
dc.date.accessioned2018-05-29T07:49:29Z
dc.date.available2018-05-29T07:49:29Z
dc.date.issued2011
dc.date.updated2017-10-31T09:00:47Z
dc.description.abstractSoil erosion has been considered a major problem in .South Africa since the early 20th Century, yet the degree to which rates of soil erosion may exceed rates of soil production has not been well constrained by previous studies. Here we present 22 cosmogenic 3He-based maximum denudation rates of Karoo dolerite bedrock surfaces, and interpret these values as local rates of soil production. These generally low soil production rates (<4 m/Myr measured over a 105 yr timescale) are in all instances lower than various literature estimates for the corresponding rates of soil erosion in the same catchments, by up to two orders of magnitude. This significant contrast between long term rates of soil production and short term rates of soil erosion suggests that current agricultural practices are unsustainable under prevailing geological conditions.
dc.identifier.apacitationDecker, J. E., Niedermann, S., & De Wit, M. J. (2011). Soil erosion rates in South Africa compared with cosmogenic 3He-based rates os soil production. <i>South African Journal of Geology</i>, http://hdl.handle.net/11427/28172en_ZA
dc.identifier.chicagocitationDecker, J E, S Niedermann, and M J De Wit "Soil erosion rates in South Africa compared with cosmogenic 3He-based rates os soil production." <i>South African Journal of Geology</i> (2011) http://hdl.handle.net/11427/28172en_ZA
dc.identifier.citationDecker, J. E., Niedermann, S., & De Wit, M. J. (2011). Soil erosion rates in South Africa compared with cosmogenic 3He-based rates of soil production. South African Journal of Geology, 114(3-4), 475-488.
dc.identifier.ris TY - AU - Decker, J E AU - Niedermann, S AU - De Wit, M J AB - Soil erosion has been considered a major problem in .South Africa since the early 20th Century, yet the degree to which rates of soil erosion may exceed rates of soil production has not been well constrained by previous studies. Here we present 22 cosmogenic 3He-based maximum denudation rates of Karoo dolerite bedrock surfaces, and interpret these values as local rates of soil production. These generally low soil production rates (<4 m/Myr measured over a 105 yr timescale) are in all instances lower than various literature estimates for the corresponding rates of soil erosion in the same catchments, by up to two orders of magnitude. This significant contrast between long term rates of soil production and short term rates of soil erosion suggests that current agricultural practices are unsustainable under prevailing geological conditions. DA - 2011 DB - OpenUCT DP - University of Cape Town J1 - South African Journal of Geology LK - https://open.uct.ac.za PB - University of Cape Town PY - 2011 T1 - Soil erosion rates in South Africa compared with cosmogenic 3He-based rates os soil production TI - Soil erosion rates in South Africa compared with cosmogenic 3He-based rates os soil production UR - http://hdl.handle.net/11427/28172 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/28172
dc.identifier.vancouvercitationDecker JE, Niedermann S, De Wit MJ. Soil erosion rates in South Africa compared with cosmogenic 3He-based rates os soil production. South African Journal of Geology. 2011; http://hdl.handle.net/11427/28172.en_ZA
dc.language.isoeng
dc.publisher.departmentDepartment of Geological Sciencesen_ZA
dc.publisher.facultyFaculty of Scienceen_ZA
dc.publisher.institutionUniversity of Cape Town
dc.sourceSouth African Journal of Geology
dc.source.urihttp://sajg.geoscienceworld.org/
dc.titleSoil erosion rates in South Africa compared with cosmogenic 3He-based rates os soil production
dc.typeJournal Article
uct.type.filetypeText
uct.type.filetypeImage
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