珠江三角洲千年尺度演变的动态平衡及其唯象判据探讨

A preliminary study on the phenomenological relation between morphodynamic equilibrium and geomorphic information entropy in the evolution of the Zhujiang River Delta

本文从学科交叉需要审视"平衡态"这一重要的基本概念在若干学科,包括河口海岸学的异同,简述6 000~2 500aBP珠江河口三角洲主要动力沉积结构演变。在形态动力模型PRD-LTMM基础上选取水深-面积作为系统表征变量,分析不同子系统的统计特性并构建各自的信源概率空间,计算子系统水深信息熵的时间序列。通过比较沉积动力结构演变和地貌信息熵序列,发现地貌信息熵可以作为在给定意义上的系统"形态动力平衡"的唯象状态函数。

From the perspective of interdisciplinary study,a brief review is conducted on the concept of＂equilibrium＂essential for the disciplines that the estuarine and coastal studies are closely related to.Based on output of the morphodynamic model PRD-LTMM,the water depth and corresponding area are selected as the state variables to construct the probability spaces that are used to calculate information entropy of the sub-delta systems.By comparing evolution of the depositional dynamic structures,which are briefly sketched in the context,and the geomorphic information entropy,it is found that the information entropy can be used as a phenomenological state function of the＂morphodynamc equilibrium＂in a given sense.