Remote sensing information topological pattern research on recent evolution of sand spit of the Huanghe River’s mouth

Utilizing satellite remote sensing information, time-space attfihutes and conceptual system of time dimension in recent evolution of the sand spit of the Huanghe River's mouth are set forth. Using them, measurement of related parameters and topological analysis of sand spit spatial structure are developed, it is shown that during the later stage of development, the sand spit growth index is near 0. In terms of parallelogram rule, the sand spit of current path will extend more difficultly towards sea with reinforcement of Coriolis force and ocean dynamics when it reaches to the deep-water region. This work would be helpful for the imminent comprehensive haraessing in "manmade fiver branching-off" the Huanghe River's mouth.