Controls on overbank deposition in the Upper Mississippi River

Impacts of Floods on Organic Carbon Concentrations in Alluvial Soils along Hydrological Gradients Using a Digital Elevation Model (DEM)

“…In fact, a certain consistency can be seen throughout the profile regarding the clay content. The finer matrices (silt and clay) are often typical of floodplain soils, and the silt portion is often the dominant fraction [20,47]. During the recession phase, the fine particles can form sedimentary covers a few centimeters thick (4-5 cm), as observed in some sites of the Saint-François River [28,37].…”

“…In frequent flood zones, little is known about the variability of organic carbon content in alluvial soils, in particular in relation to the accumulation or loss of litter, the retention potential of organic carbon in the profile and other properties of the soil subject to frequent floods [18,19]. Furthermore, there are relatively few studies on the soil-forming processes in floodplains subject to periodic flooding [20,21]. The characterization of alluvial soils, the edaphic and microtopographic conditions, along with flood episodes are key elements for analyzing the spatial variability of the soil organic carbon content [21,22], in addition to understanding the dynamics of and changes in the river system [23][24][25].…”

Prediction of channel connectivity and fluvial style in the flood-basin successions of the Upper Permian Rangal coal measures (Queensland)

“…The distribution of sand bodies in fluvial overbank settings is strongly controlled by processes that dictate the style and frequency of overbank flooding (Benedetti 2003) via the breaching of levees, the generation of crevasse splays (Morozova & Smith 2000), and the development of minor distributary channels . In particular, size, longevity, spatial distribution and style of connection of splays to primary channels governs the distribution of sand-prone elements in overbank successions.…”

Architecture, heterogeneity, and origin of late Miocene fluvial deposits hosting the most important aquifer in the Great Plains, USA

“…The floodplains of modern streams show patterns of sediment deposition and lateral fining into silt and clay deposits that are generally analogous to the appearance of our lithofacies Fl. In modern rivers, even floods with 100-year to 500-year or greater recurrence intervals may deposit only a few millimeters or centimeters of overbank clastic sediment per event at distances of hundreds of meters to a few kilometers from trunk channels (e.g., Kesel et al, 1974;Gomez et al, 1995;Middelkoop and Asselman, 1998;Benedetti, 2003;Lecce et al, 2004;Wood and Ziegler, 2008). Likewise, although oxbow lakes on modern floodplains can experience average sedimentation rates of a few centimeters per annum, individual flood layers within their sedimentary fills may be only one to a few centimeters in thickness (e.g., Wolfe et al, 2006).…”