Sedimentological impact of a high magnitude, low-frequency flood in a braided river revealed from sequential GPR surveys

N.O. Parker, G.H. Sambrook-Smith, Philip Ashworth, J.L. Best, J.S. Bridge, S.N. Lane, I.A. Lunt, C.J. Simpson

Research output: Chapter in Book/Conference proceeding with ISSN or ISBNConference contribution with ISSN or ISBNpeer-review

Abstract

Integrated aerial photography and GPR profiling has been used to explore the surface and subsurface evolution of braid bars within the South Saskatchewan River, Canada 2004-2007. Following a large flood in 2005, areas of a kilometre-long braid bar experienced incision and the creation of new unit bars. Subsequent low-magnitude, high-frequency flows during 2006 produced a further new central unit bar. Analysis of GPR profiles shows the presence of bar margin deposits in the subsurface relating to the unit bars produced in flood conditions and low-magnitude high-frequency flows. Quantitative comparisons of deposits reveal that the bar margin deposits formed during the large flood are similar in scale to the low-magnitude, high-frequency deposits with respect to the height and width of individual strata. However, stratal angles appear steeper in bar margin deposits produced by the low-magnitude, high-frequency events.
Original languageEnglish
Title of host publicationProceedings of the 12th International Conference on Ground Penetrating Radar
Place of PublicationUK
Pages0-0
Number of pages1
Publication statusPublished - 1 Jan 2008
EventProceedings of the 12th International Conference on Ground Penetrating Radar - Birmingham, UK
Duration: 1 Jan 2008 → …

Conference

ConferenceProceedings of the 12th International Conference on Ground Penetrating Radar
Period1/01/08 → …

Bibliographical note

© University of Birmingham

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