上海国土资源Issue(2)：49-53,5.DOI:10.3969/j.issn.2095-1329.2014.02.013
北部湾海湾岸线时空变化特征研究
Temporal and spatial characteristics of the shoreline along the Beibu Gulf
摘要
Abstract
Anthropogenic activities have affected the ecosystem and environment of the Chinese gulf. The shoreline provides an important reflection of geo-environmental changes in the gulf, and therefore land-ocean interaction in the coastal zone is a focus of research attention. In the present study, the characteristics of the shoreline along the Beibu Gulf in 1991, 2005, and 2010 were examined by extracting and analyzing Landsat data using remote sensing and geographical information system tools. A total of 40 shoreline segments of the studied area were selected to analyze the state of erosion and accretion of the shoreline. The analysis yielded the fol owing conclusions. (1) There is an obvious straightening trend of the Beibu gulf shoreline over time, with the fractal dimension having decreased from 1.3375 in 1991 to 1.2615 in 2010. This trend may be a result of anthropogenic activities. (2) Deposition and erosion co-occurred during changes in the shoreline, whereby the accreting shoreline segments were located mainly in zone protected from the open ocean with a mean rate of accretion of 23 m/yr, and the eroding shoreline segments were located mainly in the zone exposed to the open ocean with a mean rate of erosion of 24 m/yr. (3) Among the different types of shoreline, the biological coast and sandy coast both retreated landward at a rate of 14 m/year. In contrast, the silt coast prograded at a rate of 9 m/yr, whereas the position of the rocky coast remained static.关键词
海湾岸线/Landsat影像/分形方法/冲淤演变/北部湾Key words
shoreline of the bay/Landsat images/fractal analysis/erosion and deposition/Beibu Gulf分类
海洋科学引用本文复制引用
葛振鹏,戴志军,谢华亮,魏稳,林益帆,高近娟..北部湾海湾岸线时空变化特征研究[J].上海国土资源,2014,(2):49-53,5.基金项目
国家自然科学基金(41376097) （41376097）
河口海岸学国家重点实验室科研业务费资助项目(2010RCDW03) （2010RCDW03）
