CAJ | 학술논문

南海环礁发育过程中形成了开放程度不同的环礁类型,依据环礁不同地貌部位的几何因子作为反映环礁开放程度的指标可以定量划分环礁开放程度类型。如果将澙湖潮汐通道作为环礁地貌结构要素用来反映环礁开放程度,则潮汐通道可以成为新的度量因子。利用高分辨率遥感影像结合 GIS 技术,以澙湖潮汐通道的几何参数为主构建反映环礁开放程度的模型,结果表明,以口门宽度与礁体中轴线长度之比为指标建立的经验式,可用来划分环礁开放程度类型,封闭型环礁的开放度为0,准封闭型环礁的开放度为0~0.06,半开放型环礁的开放度为0.06~0.25,开放型岛礁的开放度为0.25~1。因此,采用这一量化表达式反映南海环礁的开放程度类型,可为珊瑚环礁的开放程度发育规律研究提供科学工具。
남해배초발육과정중형성료개방정도불동적배초류형,의거배초불동지모부위적궤하인자작위반영배초개방정도적지표가이정량화분배초개방정도류형。여과장석호조석통도작위배초지모결구요소용래반영배초개방정도,칙조석통도가이성위신적도량인자。이용고분변솔요감영상결합 GIS 기술,이석호조석통도적궤하삼수위주구건반영배초개방정도적모형,결과표명,이구문관도여초체중축선장도지비위지표건립적경험식,가용래화분배초개방정도류형,봉폐형배초적개방도위0,준봉폐형배초적개방도위0~0.06,반개방형배초적개방도위0.06~0.25,개방형도초적개방도위0.25~1。인차,채용저일양화표체식반영남해배초적개방정도류형,가위산호배초적개방정도발육규률연구제공과학공구。
All coral atolls consist of several facies zones. Tidal inlet, which is the channel to connect the lagoon and the sea, has different geometric shapes. According to different angle and principle, coral atolls have been classified into various types. In order to identify the open type of atolls quantificationally, two geometric parameters of tidal inlet are regarded as new metrical factors to construct a new expression. The new description function is the ratio of tidal inlet’s width to atoll’s midline. Finally, the threshold division of the atolls’ type is formed on the basis of the new expression. The threshold result shows that the open degree of the enclosed atolls is 0, the contiguous enclosed atolls is between 0 and 0.06, the half-opening atolls’ is between 0.06 and 0.25, and the opening atolls’ is between 0.25 and 1. Thus, the new function can be used to reflect the openness of different atolls for development regularity of coral atolls in the South China Sea.