近50年来广西海岸滩涂变化特征分析  

Analysis on the characteristics of changeable intertidal zones along Guangxi coast in the late of 50 years

作　　者：黄鹄[1] 陈锦辉[2] 胡自宁[3] 

机构地区：[1]中山大学环境科学研究所,广东广州510275 [2]广西师范学院资源与环境学院,广西南宁530001 [3]广西遥感中心,广西南宁530023

出　　处：《海洋科学》2007年第1期37-42,共6页Marine Sciences

基　　金：广西科学基金资助项目(0448039)

摘　　要：作者利用不同时段的遥感影像、数字化地形图和历史航空相片,在地理信息系统平台上提取广西海岸滩涂的变化资料,并对其进行分析。结果表明,近50 a来广西海岸滩涂的变化特征为:滩涂面积经历了由加速递减(1955～1977年)、滩涂面积变化基本不变(1978～1988年)到滩涂面积再次递减的3个阶段(1988年以来),其中滩涂面积变化最大的是沙砾质滩涂,其次是红树林滩涂,这两类滩涂面积减少最多、递减速率最快。Changeable data in the spatial and temporal spans were obtained on the platform of the geographical information system by using different satellite remote sensing data, digital topography maps and historic airplane photos, which were further analyzed. The results showed that： the total intertidal zones along Guangxi coast decreased in recent 50 years, which abruptly decreased from 1955 to 1977, basically were invariable from 1978 to 1998 and have decreased since 1998. Moreover, the change of the sand-gravel tidal flat was biggest among the whole tidal flat types, the change of the mangrove tidal flat is next, and these two types decreased mostly and their decreased degrees were fast.

关 键 词：滩涂 特征分析 广西海岸 遥感和GIS(Geographical INFORMATION System GIS) 

分 类 号：P737.1[天文地球—海洋地质]