›› 1987, Vol. 7 ›› Issue (2): 170-180.

• 开发宝岛 • 上一篇    下一篇

海口湾岸滩特征及其发展趋势

陈志永   

  1. 中山大学科研处
  • 出版日期:1987-04-30 发布日期:1987-04-30

THE CHARACTERISTICS AND DEVELOPING TREND OF THE SHORE AND BEACH IN HAIKOU BAY

Chen Zhiyong   

  1. Zhongshan University
  • Online:1987-04-30 Published:1987-04-30

摘要: 一、概况海南岛海口湾是一个以南波江三角洲和后海为上、下岬角的不对称的弓形海湾。从形态上可见,海湾的形成与南渡江三角洲的发展密切相关。据研究,南渡江三角洲经历了两次大规模的海进。距今6000年海口湾岸线在迈雅—渡头附近(图1)。近6000年来,三角洲经历了河口湾浅海→河口三角洲→波控型三角洲发育阶段。随着南渡江三角洲的伸展,东部河口泥沙在波浪和潮流的作用下,不断向西北搬运,或封堵河口,迫使河口向西北偏移;距今约2000年,南渡江已从西北部的沙上港和网门港附近出口。据网门港潮间带(H-C6)淤泥的14C测定,其年代为810±70年,可见距今约900年三角洲的前缘已伸展到现海滨。

Abstract: Haikou Bay,lying in the north of Hainan Island,is a logarithmic spiral-shaped one developed in the last 2 000 years with the evolution of the Nandu River Delta.Since the northeast prevailing wind wave of this bay is refracted and diffracted due to its landform and the tidal current reciprocates between the west and the east of Qiongzhou Strait,the shoreline are approaching an equilibrium at present.In this paper,the author reveals the characteristics of the shore and beach in Haikou Bay from the analysis of dynamics,geomorphology and sedimentation,and suggests some preliminary proposals for the future construction of the harbor in this bay according to the evolutional law of the shore and beach system of logarithmic spiral-shaped bay.