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.
|Title of host publication||Proceedings of the 12th International Conference on Ground Penetrating Radar|
|Place of Publication||UK|
|Number of pages||1|
|Publication status||Published - 1 Jan 2008|
|Event||Proceedings of the 12th International Conference on Ground Penetrating Radar - Birmingham, UK|
Duration: 1 Jan 2008 → …
|Conference||Proceedings of the 12th International Conference on Ground Penetrating Radar|
|Period||1/01/08 → …|
Bibliographical note© University of Birmingham
Parker, N. O., Sambrook-Smith, G. H., Ashworth, P., Best, J. L., Bridge, J. S., Lane, S. N., Lunt, I. A., & Simpson, C. J. (2008). Sedimentological impact of a high magnitude, low-frequency flood in a braided river revealed from sequential GPR surveys. In Proceedings of the 12th International Conference on Ground Penetrating Radar (pp. 0-0).