Delta is a type of estuarine landform formed by sediment deposition when rivers carry sediment into lakes or seas.When the upper delta is at a higher elevation and has a relatively steep longitudinal slope,the sedimentation will locally exhibit significant alluvial fan features.The formation and evolution of the entire del-ta demonstrates the uncertainties of the complex system.By conducting repeated natural modeling experiments,the impact of two different water inflow rates on the formation and evolution of sedimentation in a lacustrine delta with steep terrain gradient has been evaluated.Based on multi-peak Gaussian fitting of cross-sectional sedimentary characteristics and statistical analysis of temporal fluctuations of its characteristic parameters,it is shown that the development of upstream delta under low flow conditions exhibits multi-directional uncertain-ties,while the accumulation under high flow conditions exhibits vertical multi-level structured uncertainties.
关键词
水流输入/大比降入湖三角洲/冲积扇特性/堆积结构不确定性
Key words
water inflow/lacustrine delta with large terrain gradient/alluvial fan characteristics/sedimentation uncertainty
维普
万方数据