| 摘要: |
| 基于涠洲岛2012年12月、2013年7月和2013年12月砂质岸滩剖面高程数据以及沉积物粒度数据, 作者分析了2012～2013年涠洲岛砂质海岸短期冲淤变化。结果表明: (1)2012年12月～2013年7月, 在热带风暴的影响下, 涠洲岛大部分岸滩发生侵蚀现象, 侵蚀最严重部位一般在中滩; (2)2012年12月～2013年12月, 侵蚀岸段主要在东南部、西南部和西北部低滩, 淤积岸段主要在北部、西北部高中滩; (3)根据沉积物颗粒平均粒径分析结果, 一般高滩沉积物较低滩粗, 说明水动力环境高滩相对较强, 各岸段沉积物颗粒变化基本与岸滩剖面冲淤变化相一致。短时期内, 影响涠洲岛岸滩冲淤变化的因素有波浪、潮汐、风暴潮和人类活动等。 |
| 关键词: 涠洲岛 岸滩剖面 粒度参数 |
| DOI：10.11759//hykx20141119002 |
| 分类号: |
| 基金项目:国家海洋公益性行业科研专项资助项目(201005010); 中央级公益科研院所基本研究基金项目(GY0213G04) |
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| Short-term shore change characteristics of erosion and deposition on Weizhou Island in Beihai, Guangxi Province |
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ZHANG Xin,LI Ping,YANG Qi-zheng,YAO Zi-heng,YANG Qing-le,XU Yuan-qin
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| Abstract: |
| Based on data of beach profiles and sediment grain acquired from Weizhou Island in December 2012, July 2013, and December 2013, the short-term shore change characteristics of erosion and deposition on Weizhou Island were analyzed from 2012 to 2013. Results showed the following: (1) From December 2012 to July 2013, most of the sections of the island had eroded and that the most seriously eroded area was the middle beach due to the effect of a tropical storm; (2) From December 2012 to December 2013, eroded sections occurred mainly in the southeast, southwest and on the low beach of the northwest, moreover, silting sections appeared in the north and upper part of the northwest; (3) Results of a mean particle diameter analysis showed that there were coarser sediments on the high beach than on the low beach, illustrating that the high beach had a relatively high hydrodynamic environment. Changes in coastal sediments were consistent with scouring and silting changes of each beach profile. During a short time period, the factors affecting scouring and silting changes on Weizhou Island were waves, tides, storm surges, human activities, etc. |
| Key words: Weizhou Island beach profile grain size parameters |
