运用DSAS和SMC分析人工岛建设对岸线变化的影响

发布时间：2018-02-20 23:04

  本文关键词： 东郊椰林 人工岛 岸线 沙嘴 连岛沙坝　出处：《中国海洋大学学报(自然科学版)》2017年10期 　论文类型：期刊论文

【摘要】：海南岛东郊椰林人工岛建设于砂质海岸外,对海岸线变化有非常大的影响。选取5景遥感影像,运用DSAS数字岸线分析系统分析人工岛建设前后岸线变化,同时利用SMC模拟系统分析人工岛建设前后水动力变化情况,用于分析研究泥沙运移趋势。结果表明人工岛建设后,该海岸西段人工岛与陆地之间海域波浪场明显减弱,而沿岸流则由人工岛建设前的自东向西,变为人工岛建设后后两股沿岸流在岛体后方相汇,利于此处泥沙堆积。通过岸线变化分析,人工岛建设之后西段岸线受人工岛的遮蔽由侵蚀转变为淤积,最大淤积速率可达70m/a,形成现在向海凸出沙嘴,最终将演化为连岛沙坝,东段岸线接受不到岛体的庇护则仍表现为侵蚀状态。
[Abstract]:The coconut forest artificial island in the eastern suburb of Hainan Island is built off the sandy coast, which has a great influence on the shoreline changes. Five remote sensing images are selected to analyze the shoreline changes before and after the construction of the artificial island by using DSAS digital shoreline analysis system. At the same time, SMC simulation system was used to analyze the hydrodynamic changes before and after the construction of artificial islands, which was used to study the trend of sediment transport. The results showed that the wave field in the sea area between artificial island and land in the western part of the coast obviously weakened after the construction of artificial island. The coastal current changed from east to west before the artificial island was built, and changed into the convergence of the two coastal currents behind the island body after the artificial island construction, which is conducive to the accumulation of sediment here. Through the analysis of the shoreline variation, After the construction of the artificial island, the coast line of the western section was shaded by artificial island from erosion to siltation, and the maximum deposition rate could reach 70 m / a, forming the sand mouth that is now protruding to the sea, which will eventually evolve into an even island sandbar. The eastern shore line still shows erosion when it can not accept the shelter of the island body.
【作者单位】： 河北省地矿局秦皇岛矿产水文工程地质大队;河北省海洋地质资源调查中心;国家海洋局秦皇岛海洋环境监测中心站;
【基金】：三沙市国土资源与环境保护局资助项目(HNYS-DZ-2015-001)资助~~
【分类号】：P737.1;P756.8
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本文编号：1520283