海平面上升对长江口波浪影响的预测与分析

发布时间：2018-01-12 06:29

本文关键词：海平面上升对长江口波浪影响的预测与分析　出处：《同济大学学报(自然科学版)》2016年09期 　论文类型：期刊论文

更多相关文章： 长江口 海平面上升 MIKE 波高 波周期

【摘要】：基于MIKE 21SW建立了长江口波浪数学模型,采用实测资料对波浪模型进行了验证,分别模拟当前海平面和海平面上升0.5,1.0,1.5m情景下的不同风向下的波浪分布,比较分析了波浪随海平面上升的变化特征,长江口波浪随海平面上升的一般特征为:波高和周期变化过程与潮位变化过程一致,波高增量高水位时大于低水位;口内波高增量明显小于口外,滩地增量最大,滩地迎风向的波高增量比背风向大;波周期变化特征与有效波高相似,但变幅明显小于波高变幅.
[Abstract]:Based on MIKE 21SW, the wave model of the Changjiang Estuary is established. The wave model is verified by the measured data, and the current sea level and sea level rise are simulated respectively. The wave distribution under different wind directions in 1.5m scenario is compared and analyzed. The variation characteristics of wave with sea level rise are compared and analyzed. The general characteristics of the waves in the Changjiang Estuary with the rise of sea level are as follows: the wave height and the periodic variation process are consistent with the tidal level change process, the wave height increment is larger than the low water level when the wave height increment is high water level; The increment of wave height in the mouth is obviously smaller than that outside the mouth, and the increment of the wave height in the beach is the largest, and the increment of the wave height in the upwind direction is larger than that in the leeward direction. The variation of wave period is similar to that of effective wave height, but the variation amplitude is obviously smaller than that of wave height variation.
【作者单位】：同济大学土木工程学院;浙江海洋大学海运与港航建筑工程学院;上海海洋大学海洋科学学院;
【基金】：国家“九七三”重点基础研究发展计划(2012CB957704)
【分类号】：P731.2
【正文快照】： 海平面上升是一个缓慢而持续的过程,其长期累积的结果将对沿岸地区构成严重威胁.自20世纪90年代以来,众多学者对海平面上升可能给长江口地区带来的影响进行了研究并做出预测,研究表明海平面上升不仅将对长江口地区自然环境及生态系统造成影响,还会带来严重的经济损失、对人口

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