A MODEL OF THE EFFECTS OF SEDIMENTATION-RATE ON THE STABILITY OF MISSISSIPPI DELTA SEDIMENTS

被引:13
作者
ADAMS, CE [1 ]
ROBERTS, HH [1 ]
机构
[1] LOUISIANA STATE UNIV,DEPT OCEANOG & COASTAL SCI,BATON ROUGE,LA 70803
关键词
D O I
10.1007/BF01204388
中图分类号
P [天文学、地球科学];
学科分类号
07 ;
摘要
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.
引用
收藏
页码:17 / 23
页数:7
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