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基于Landsat 8卫星数据的南沙礁群分布研究
引用本文:蒋昌波,马远,隆院男,袁帅,康远泰,尹令实,闫世雄.基于Landsat 8卫星数据的南沙礁群分布研究[J].海洋通报,2021(4).
作者姓名:蒋昌波  马远  隆院男  袁帅  康远泰  尹令实  闫世雄
作者单位:长沙理工大学 水利工程学院,湖南 长沙 410114;洞庭湖水环境治理与生态修复湖南省重点实验室,湖南 长沙 410114
基金项目:国家自然科学基金重点项目 (51839002);国家自然科学基金 (91647118;51879015)
摘    要:南沙岛礁的发育受空间位置、暴露面积及地质结构等因素的影响,礁体的演变伴随空间形态的变化。本文利用遥感和地理信息系统(GIS)相结合的方法绘制南沙岛礁核密度现状图,并采用Kernel Density进一步分析南沙礁群空间核密度分布。研究表明:南沙岛礁空间形态复杂,有明显区域格局性,面积差异较大的岛礁核密度聚集位置不相同,分布特征相对密集。岛礁数量在纬度方向有明显浮动,在经度方向上趋于稳定。随礁体面积的增大,礁体平均形状指数逐渐增大,平均紧凑度逐渐减小,形状指数LSI介于0.90~2.87之间、紧凑度RC介于0.31~0.97之间。研究结果有助于更好地了解南沙岛礁密度情况,为海洋管理人员提供参考信息。

关 键 词:遥感  南沙岛礁  核密度分析  空间格局
收稿时间:2020/11/10 0:00:00
修稿时间:2021/3/10 0:00:00

Spatial distribution of Nansha Reef Group based on Landsat 8 satellite data
JIANG Changbo,MA Yuan,LONG Yuannan,YUAN Shuai,KANG Yuantai,YIN Lingshi,YAN Shixiong.Spatial distribution of Nansha Reef Group based on Landsat 8 satellite data[J].Marine Science Bulletin,2021(4).
Authors:JIANG Changbo  MA Yuan  LONG Yuannan  YUAN Shuai  KANG Yuantai  YIN Lingshi  YAN Shixiong
Institution:School of Hydraulic Engineering, Changsha University of Science & Technology, Changsha 410114, China;Key Laboratory of Dongting Lake Aquatic Eco-Environmental Control and Restoration of Hunan Province, Changsha 410114, China
Abstract:The development of Nansha Islands and reefs is affected by spatial location, exposed area and geological structure, and the evolution of reefs is accompanied by the change of spatial morphology. In this paper, remote sensing and geographic information system (GIS) are used to map the density of Nansha Islands and reefs, and Kernel Density is used to further analyze the spatial distribution of Nansha reefs. The results show that the spatial form of Nansha Islands and reefs is complex with obvious regional pattern, the core density of islands and reefs with relatively large surface differences is concentrated in different places, and their distribution features are relatively dense. The number of islands and reefs fluctuates obviously in latitude direction and tends to be stable in longitude direction. With the increase of reef area, the reef average shape index increases gradually and the average compactness decreases gradually. The shape index (LSI) is between 0.90 ~ 2.87, and the reef compactness (RC) is between 0.31 ~ 0.97. The research results are helpful to understand the density of Nansha Islands and reefs and provide reference for marine administrators.
Keywords:remote sensing  Nansha Islands  Kernel density analysis  spatial pattern
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