A topological pattern research on recent evolution of sand spit at the Huanghe River mouth by using remote sensing informations

By using satellite remote sensing informations,the conceptual system of time-space attributes and time dimension in recent evolution of the sand spit at the Huanghe River mouth is expounded.Based on this work,the parameterization of relevant factors and topological analysis of sand spit spatial structure are conducted,and a model,which is suitable for representing the development and growth of the Huanghe River mouth is developed.It is slbwn that during the later stage of its development,the sand spit growth index is almost 0.According to the parallelogram rule,under the reinforce effects of the Coriolis force and ocean dynamics,the sand spit of current stream will never extend towards sea when it reaches the deep-water area.This work would be helpful to the imminent comprehensive harness of the "man-made river branch" at the Huanghe River mouth.