【摘要】 通过2007年7月至2010年2月对福建沿岸25个主要沙丘岸段的调查,以及代表性海滩-沙丘地貌系统地形变化的重复观测,针对福建海岸海滩类型和前缘沙丘地貌组合,从海滩动力地貌特征、沙丘形态及其变化角度出发,分析了海滩-沙丘地貌体系的变化特征,并进一步探索海滩动力地貌与沙丘地貌及其变化之间的关系模式。结果为:(1)福建沿岸海滩-沙丘系统的地貌变化可以归纳为3种类型:①海滩稳定-沙丘变化型;②海滩侵蚀-沙丘稳定型;③海滩侵蚀-沙丘后退型。(2)福建沿岸海滩-沙丘系统的动力地貌关系可以归纳为6种基本模式,主要表现为完全耗散型、过渡型和低潮阶地型3种海滩地貌与沙丘规模和形态的对应关系,海滩的沉积状态与海滩-沙丘系统内部的相互作用,也在某种程度上决定了其动力地貌关系模式。更多还原

【Abstract】 Based on the observation of 25main beach-dune systems along the coast of Fujian province and the repeated measurement of typical coastal dune and beach profiles from July 2007to February 2010,we studied the morphodynamics of the beach-dune system and its relation with the coastal hydrodynamic conditions of the macro-tidal environment.It is concluded as follows:(1)the beach-dune morphological changes can be grouped into 3types,①the stable beach with changing dunes,②the erosional beach with stable dunes,and③the erosional beach with retreating dunes;(2)the relationship between beach morphodynamics and dune morphology can be summarized into 6basic types,including three major types of beach superimposed by different dunes.The interaction of dune morphology and sedimentation is also a controlling factor of the beach morphology to certain extent.更多还原