海岸沙丘形态对台风响应的初步观测

发布时间：2018-06-15 01:25

本文选题：海岸沙丘 + 形态响应　；参考：《地理研究》2016年10期

【摘要】：基于2014年第10号强台风"麦德姆"登陆前后福建平潭岛海岸前丘、爬坡沙丘、横向沙丘和沙席等海岸沙丘形态的高精度测量数据,分析了典型海岸沙丘在台风登陆前后的形态变化,初步总结了华南海岸风沙地貌形态的台风响应模式。结果表明:4类典型海岸沙丘在台风"麦德姆"登陆前后的形态变化较大且主要是以体积减小和沙丘高度降低为主,测点高程的平均变化值为0.22 m,样区海岸沙丘体积平均减小0.59%,测点高程变化的平均值为高度降低0.05 m,但不同类型海岸沙丘及其不同部位的响应变化并非一致且存在较大差异,此与台风"麦德姆"的强侵蚀力及不同海岸沙丘的形态及其下伏地形、表面植被分布等的差异有关。
[Abstract]:Based on the high-precision measurement data of coastal dune, such as front dune, climbing dune, transverse dune and sand mat, before and after strong typhoon No. 10 (2014) made landfall in Pingtan Island, Fujian Province, The morphological changes of typical coastal dunes before and after typhoon landfall are analyzed, and the typhoon response model of wind-sand geomorphology in South China coast is preliminarily summarized. The results show that the morphological changes of the typical coastal dunes of the four types of "1: 4" before and after the landfall of Typhoon "Medham" are large, and the main changes are the decrease of volume and the height of sand dunes. The average height of the measured point is 0.22 m, the average volume of the coastal dune decreases by 0.59 m, the average height of the measured point is decreased by 0.05 m, but the responses of different types of coastal dunes and different parts of the dune are not the same and there are great differences. This is related to the strong erosivity of Typhoon Medham and the differences of sand dune morphology, underlying topography, surface vegetation distribution and so on.
【作者单位】：中山大学地理科学与规划学院广东省城市化与地理环境空间模拟重点实验室;中山大学新华学院;四川省德阳市国土资源局;
【基金】：国家自然科学基金项目(41371030)
【分类号】：P444;P737.1

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