摘要
通过对比不同时相的遥感影像,结合2008年的现场调查,介绍了雷州半岛海岸侵蚀现状并初步探讨了海岸侵蚀的原因。结果显示,雷州半岛南部和西部海岸除海湾之外都有不同程度的海岸侵蚀现象,共有10段岸段发生海岸侵蚀,总长度约281km,占整个雷州半岛岸线的21.95%。除湛江湾、雷州湾、北莉河口以及安浦港等湾外,雷州半岛海岸侵蚀率约为43.35%。从砂质海岸、气候条件、水文条件、河流输沙量的减少、海平面上升、风暴潮和人为因素等7个方面综合分析了海岸侵蚀的原因,认为砂质海岸为海岸侵蚀的物质基础,气候条件、水文条件和海平面上升为根本因素,风暴潮和人为改造为海岸侵蚀加剧的决定性因素。
By comparing remote sensing images of different time phases, this paper introduces the current state of coastal erosion and discusses its causes in Leizhou Peninsula with field investigation in 2008. The results show that the south and west coasts in Leinzhou Peninsula has coastal erosion phenomena in varying degrees. There are ten coastal segments which have been eroded, covering a total length of 244km, accounting for about 15.54% of the total coastal line of Leizhou Peninsule. Except Zhanjiang bay, Leizhou bay, Beili estuarine and Anpu harbour, the Erosion Ratio of Leizhou Penisnsula is 46.85%. This paper analyzes synthetically the causes of coastal erosion in seven factors including sandy coast, climate, hydrology condition, decrease of river transporting, sand quantity, sea level rises, storm tide and man-made reconstruction factor, etc.,and points out that sandy coast is the substance base, climate condition, hydrology condition and sea level rises are the essential factors, and storm tide and man-made reconstruction are the crucial factors of coastal erosion.
出处
《热带地理》
北大核心
2011年第3期243-250,共8页
Tropical Geography
基金
广东省908专项"广东省海岸带(港址)综合调查"(GD908-01-01)
关键词
雷州半岛
海岸侵蚀
海平面上升
风暴潮
人为改造
Leizhou Peninsula
coastal erosion
sea level rises
storm surge
man-made reconstruction
