FLUME-EXPERIMENTAL STUDY ON THE FORMATION AND EVOLUTION OF LAKE DELTA SANDBODY

In this paper,the modelling of formation and evolution of delta sandbodies is made with lake sedimentary environment in a condition of 3.5m×1.0m×0.6m flume and 5.0m×2.5m×0.6m basin.In addition,the authors model on the process of regression and progredation.The main achievements of such experimental studies can be concluded as:1)the geometry and deposition rate of delta sandbodies are controlled by water depth of lakes;2)the ratio of sandbody width/height is the key parameter for recognition of delta sandbody geometry and 3)the flood would play an important role for the deformation of the delta sandbodies.