| 摘要: |
| 1990-1993年对蓬莱西庄海岸附近海域进行了水文、水深、地质地貌和泥沙等13项测量和调查。整理分析实测资料井结合数值计算，首次分析研究了登州浅滩的作用，并着重论述了浅滩被破坏后袭击岸边的波浪增大，波能增加到5-7倍，沿岸净输沙量增加到3-5倍。文中指出西庄海岸侵蚀加剧的主要原因是，登州浅滩被破坏后失去防浪消波作用而造成的。 |
| 关键词: 登州浅滩 波浪 净输沙率 海岸侵蚀 |
| DOI： |
| 分类号: |
| 基金项目:山东省自然科学基金资助项目，鲁科计（91）第30号 |
|
| RESEARCH ON THE EFFECT OF DENGZHOU SHOAL |
|
Wu Guqiu, Meng Xiangdong, Xia Dongxing, Cui Jinrui
|
|
First Institute of Oceanography, SOA, Qingdao 266003
|
| Abstract: |
| In recent years, serious coastal erosion occurred near Xizhuang, Penglai County. In order to find the reason of the erosion and the means of protection, the field measurement of hydrography, water depth, geology, geography and sediment tracing etc. totally 13 terms were conducted by the advanced instruments made of home and abroad during the years of 1990-1993. Combined the measurement data with the numerical calculation, this paper studied the function of Dengzhou Shoal as it wasn't damaged as follows: obstructing the direct attack of high waves (H > 1.5m) on the coast of Xizhuang, reducing the coastal erosion by breaking waves, thus being a natural submerged barrier against waves and protecting the safety of people. This paper emphatically demonstrated the consequence resulted from the dredge from Dengzhou Shoal as follows: the waves entering nearshore increase, wave energy increases by 5 - 7 times, the net sediment transportation increases by 3 - 5 times, because there were no sediment sources near the sea area auto replenish, thus the coastal erosion rate was enlarged from 3 - 9 cm/a before the damage of the Shoal to 4 - 6 m/a after the damage. It appeared that the coastline drew back 14 - 20 m at one time of the stom1 surge. This paper advances for the first time that the main reasons of coastal erosion in Xizhuang were the damage of Dengzhou Shoal, the increasing of wave energy, which enlarged the coastal erosion sharply, so led to the disaster to happen. At the same time, this paper has accumulated data and experiences for the future researches in coastal erosion. |
| Key words: Dengzhou Shoal, Wave energy, Net sediment transport rate, Coastal erosion |
