A model of the effects of sedimentation rate on the stability of Mississippi Delta sediments
High sedimentation rates on the subaqueous delta of the Mississippi River create localized sediment instabilities that result in downslope movement through well-defined chutes or gullies. A simplified kinematic wave equation model that neglects second-order effects such as diffusion treats the failure mechanism as a sedimentation and slope oversteepening process and sediment motion as a propagating kinematic wave. The model allows estimation of sedimentation rates necessary to initiate slope failures for a range of observed depths of basal shear planes. Model results indicate that slope oversteepening is a viable failure mechanism and a thin surface sediment layer may be moving downslope in a slow, continuous motion. © 1993 Springer-Verlag.
Publication Source (Journal or Book title)
Adams, C., & Roberts, H. (1993). A model of the effects of sedimentation rate on the stability of Mississippi Delta sediments. Geo-Marine Letters, 13 (1), 17-23. https://doi.org/10.1007/BF01204388