近期黄河口沙嘴演变遥感信息的拓扑模型研究

利用卫星遥感信息,阐述了近期黄河口沙嘴演变中的时空属性和时间维的概念化系统,以此进行相关参数的量化和沙嘴空间结构的拓扑分析,并建立符合表达黄河口沙嘴延伸和发育的模型。就此指出沙嘴发育指数趋近于0时,其已发育至晚期的后阶段,加之科氏力和海洋动力的增强,依据平行四边形法则,现行流路上的河口沙嘴进入深水区再难以向海延伸,从而促使黄河入海流路“人工改汊”的综合治理。

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 attributes 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 harnessing in"manmade river branching-off" the Huanghe River's mouth.