珠江河口“门”的地貌动力学初探

doi:10.11821/xb200605010

地理学报 ›› 2006, Vol. 61 ›› Issue (5): 537-548.doi: 10.11821/xb200605010

珠江河口“门”的地貌动力学初探

吴超羽¹, 任杰¹, 包芸^1,2, 史合印¹, 雷亚平¹, 何志刚¹, 唐兆民¹

1. 中山大学近岸海洋科学与技术研究中心,广州 510275;
2. 中山大学力学系,广州 510275

收稿日期:2005-10-26 修回日期:2006-03-18 出版日期:2006-05-25 发布日期:2006-05-25
作者简介:吴超羽 (1944-), 男, 广东开平人, 教授。主要从事河口海岸带的“动力-沉积-地貌”研究。E-mail: eepeios@zsu.edu.cn
基金资助:
国家自然科学基金 (40331007; 40176026; 40406016); 985项目 (105203200400006) 资助

A Preliminary Study on the Morphodynamic Evolution of the‘Gate’of the Pearl River Delta, China

WU Chaoyu¹, REN Jie¹, BAO Yun^1,2, SHI Heyin¹, LEI Yaping¹, HE Zhigang¹, TANG Zhaomin¹

1. Center for Coastal Ocean Science and Technology Research, Zhongshan University, Guangzhou 510275, China;
2. Department of Mechanics, Zhongshan University, Guangzhou 510275, China

Received:2005-10-26 Revised:2006-03-18 Online:2006-05-25 Published:2006-05-25
Supported by:
National Natural Science Foundation of China, No.40331007; No.40176026; No.40406016: The Project of 985, No.105203200400006

摘要/Abstract

摘要：

珠江河口由河网区与河口湾区构成,连接两部分的是珠江口独特的地貌单元“门”。末次海进盛期古珠江海湾可分为内海湾和外海湾,现代三角洲平原与河网均发育在古内海湾。内、外古海湾通过峡口相连,这些峡口演变为现代的“门”。本文根据实测水文资料、地形图、钻孔资料,应用PRD-LTMM长周期动力-沉积-形态模型对珠江河口的“门”6000年来地貌动力学进行探讨：(1) 现代“门”双向射流动力系统,(2) “门”的演进阶段,(3)“门”对古潮汐能量的集聚作用,(4) 珠江河口各“门”与相应的三角洲平原的同步耦合演进, (5)“门”对珠江河网形成的作用。

关键词: 河口, 三角洲, 地貌动力, “门”, 珠江

Abstract:

The Pearl River estuary system consists of a complicated stream network and estuarine bays, the two portions of the estuary system are connected by 'men' (meaning 'gate' in Chinese), a special morphological unit. During the last transgression, the ancient Pearl River estuarine bay was separated into inner and outer bays by a series of rocky islands. The brackish water of inner and outer bays is connected at only several locations through rocky gorges which became 'gates', the outlets of the network system. Based on hydrographical investigations, bore hole data, topographic maps and with the application of the long-term morphodynamic model PRD-LTMM on the delta evolution since 6000 aBP, the present a morphodynamic study focuses on (1) bi-direction jet system of modern 'gate', (2) evolution of 'gate', (3) effect of 'gate' on tidal energy convergence, (4) coupling development of 'gate' with the associated Pearl River Delta plain, and (5) mechanism of 'gate' on the formation of the network system. Mainly due to the geological constraint of the coast and the effects on the re-distribution of marine and river energy, the evolution of the Pearl River Delta and estuary system is unique among the large scale delta and estuary systems in the world.

Key words: estuary, delta, morphodynamics, ‘men’, Pearl River

吴超羽, 任杰, 包芸, 史合印, 雷亚平, 何志刚, 唐兆民. 珠江河口“门”的地貌动力学初探[J]. 地理学报, 2006, 61(5): 537-548.

WU Chaoyu, REN Jie, BAO Yun, SHI Heyin, LEI Yaping, HE Zhigang, TANG Zhaomin. A Preliminary Study on the Morphodynamic Evolution of the‘Gate’of the Pearl River Delta, China[J]. Acta Geographica Sinica, 2006, 61(5): 537-548.

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珠江河口“门”的地貌动力学初探

A Preliminary Study on the Morphodynamic Evolution of the‘Gate’of the Pearl River Delta, China

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