从溺谷湾到三角洲:现代珠江三角洲形成演变研究辨析

From drowned valley to delta:Discrimination and analysis on issues of the formation and evolution of the Zhujiang River Delta

现代珠江三角洲经历了从溺谷湾到三角洲的形成演变,富有区域特色。本文提出百余年来珠江三角洲的研究可归纳为4种范式:历史描述、实地考察−学术推理、器测−学科理论和“动力−沉积−地貌”跨尺度范式,各以范例说明。基于笔者及其团队研究,对现有文献关于珠江三角洲形成演变若干重要观点提出不同意见并从多视角作必要辨析,包括:海侵盛期以来千年尺度三角洲岸线位置变化,现代珠江三角洲形成演变的模式和三角洲干流河段形成过程与机理。最后对三角洲研究中的多学科、跨尺度和时空量化做了简要讨论。

The modern Zhujiang River Delta has experienced the formation and evolution from drowned valley to delta,which is rich in regional characteristics.The research on the Zhujiang River Delta in the past hundred years is summarized into four paradigms:historical description,field investigation-scientific reasoning,instrument applieddiscipline theory and“dynamic-sedimentary-morphologic”scale-crossing paradigm.Each illustrated by superb examples and documented.Based on the research of the authors and his team,this paper puts forward several propositions concerning the formation and evolution of the Zhujiang River Delta,which are substantially different from the existing literature,and makes necessary differentiation and analysis from multiple perspectives,including the millennial-scale changes of coastline since the transgression maximum,the mode of formation and evolution of the modern Zhujiang River Delta and the development and its mechanism of the major channels of the network in the delta.Finally,the approache of interdisciplinary,scale-crossing and time-space quantification concerning delta research are briefly discussed.