海岸带侵蚀灾害研究进展及思考

在当今全球海平面上升的背景下,海岸侵蚀灾害已严重威胁着海岸带生存和生活环境,逐渐成为各相关领域的一个热点研究课题。因此,在总结中国典型海岸段侵蚀灾害的基础上,深刻探讨国内外海岸带侵蚀研究现状,并就此提出存在的两个关键性问题。最后,指出今后应重点加强以下5个方面的研究: (1)海岸侵蚀与地质环境条件的相关关系; (2)海岸侵蚀分区特征与发育分布规律; (3)侵蚀海岸的变形破坏模式; (4)岩土体在各种侵蚀因子作用下力学特性变化; (5)海岸稳定性的评价机制。

REVIEW AND REFLECTION ON COASTAL EROSION DISASTER

Under the background of global sea-level rise,the range of coastal erosion has become larger,and erosion degree has become more and more serious in recent years.Coastal erosion disasters have threatened the survival and living environments of coastal zones,and have gradually brought a great economic loss.Until now,occurrence mechanism and stability evaluation of coastal erosion disasters have not been fully understood yet.A majority of researchers at present are focused on the impact of wave,storm surge and other objective factors on coastal erosion.The geological factors including lithologic conditions,rock and soil mechanical properties and bank structures are seldom studied.Therefore,this paper points out that further investigations on coastal erosion disasters shall be strengthened on the following five issues: (1)correlation between coastal erosions and geological environmental conditions; (2)regional characteristics and law of development and distribution of coastal erosions; (3)deformation and failure modes of erosion banks; (4)mechanical properties of rocks and soils under different erosion factors; (5)evaluation mechanism of coastal stability.