海岸沙席形态及近表层沉积物粒度对台风的响应

发布时间：2018-04-17 04:12

本文选题：海岸沙席 + 台风“麦德姆”　；参考：《地理科学》2017年08期

【摘要】：依据2014年第10号强台风"麦德姆"登陆前后福建平潭岛典型海岸沙席的形态观测与近表层沉积物粒度数据,综合分析了海岸沙席对台风的响应特征。结果表明:(1)海岸沙席形态对"麦德姆"的响应明显,主要表现为沙席前缘高程降低(最大侵蚀深度为0.40 m),中部变化较小(-0.06~0.09 m),后缘明显升高(最大堆积厚度为1.62 m),沙席体积增大2.02%。(2)海岸沙席近表层沉积物粒度受"麦德姆"影响较小,其粒度参数在台风前后并无质的等级性变化。(3)海岸沙席的台风响应特征主要因台风过程中大风的非选择性侵蚀和搬运及海岸沙席与海滩沙粒度的相近性所造成的,同时也受到周边地势及植被等的影响。
[Abstract]:Based on the morphological observation of typical coastal mats and granularity data of near-surface sediments in Pingtan Island Fujian Province before and after strong Typhoon "Medme" landed in 2014, the response characteristics of coastal mats to typhoons were comprehensively analyzed.The results show that the response of coastal sand sheet form to "Meadham" is obvious.The main results were as follows: the height of the front edge of the sand mats decreased (the maximum erosion depth was 0.40 mL, the change of the middle part was smaller than 0.06 ~ 0.09 m ~ (-1)), and the posterior edge increased obviously (the maximum accumulation thickness was 1.62 m ~ (-1), the volume of the sand mats increased by 2.02%), and the grain size of the coastal sediment near the surface layer was less affected by "Medme".The characteristics of typhoon response of coastal sand mats are mainly caused by the non-selective erosion and transport of strong wind and the similarity of sand grains between coastal mats and beaches.At the same time also affected by the surrounding terrain and vegetation.
【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;
【基金】：国家自然科学基金项目(41371030,41101011)资助~~
【分类号】：P737.1;P931.3

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