珠江口附近海域波浪场的数值计算与特征分析

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英文篇名：Numerical Calculation and Characteristic Analysis of Wave Ffield in the Sea Area Near the Pearl River Estuary 作者：邱文博 ; 张永合 ; 胡轶群 ; 李冠宇 英文作者：QIU Wenbo;ZHANG Yonghe;HU Yiqun;LI Guanyu;Nation Ocean Technology Center;Tianjin Maritime Surveying and Charting Center of NGCN.; 关键词：珠江口海域 ; 波浪 ; 波周期 ; SWAN ; WAVEWATCHⅢ 英文关键词：Pearl River Estuary;;wave;;wave period;;SWAN;;WAVEWATCHⅢ 中文刊名：海洋湖沼通报 英文刊名：Transactions of Oceanology and Limnology 机构：国家海洋技术中心;天津海事测绘中心; 出版日期：2019-08-15 出版单位：海洋湖沼通报 年：2019 期：04 基金：海洋公益性行业科研专项经费项目(201405007)资助 语种：中文; 页：16-23 页数：8 CN：37-1141/P ISSN：1003-6482 分类号：P731.22

摘要

本文以WRF模式输出结果作为风场驱动条件,采用SWAN和WAVEWATCHIII相嵌套的方法,对珠江口附近海域进行20年(1991-2010年)的波浪场数值计算。根据计算结果,分析了珠江口海域波高和周期的空间、时间变化特征。结果显示:珠江入海口及近岸H_s较小,外海H_s较大,大部分海域年均H_s在0.4m以上;珠江口附近海域和近海地区年均T_e偏小,在2s～3s之间,外海最大可达5s。珠江海域有效波高(H_s)的季节分布呈现出春夏季较小,秋冬季较大的特点。从概率学角度分别统计20年中前5%和10%的H_s及T_e,可知:珠江口近海区域H_(s,5%)在1～2m,大万山群岛处可达H_(s,5%)2m;在珠江口附近H_(s,10%)为1.5m,万山海域H_(s,10%)在2.5m以上;计算海域T_(e,5%)和T_(e,10%)多在4s以上。
        In this paper, the output of WRF model is used as the driving condition of wind field. The SWAN and WAVEWATCHIII nested wave modes are used to calculate the wave field of the sea near Pearl River Estuary for a total of 20 years(1991-2010). According to the calculation results, In this paper, we analyzed the spatial and seasonal variation characteristics of wave height and periodn the Pearl River Estuary, The results showed that the H_sof the Pearl River estuary and its nearshore are small, and the H_s of the offshore is relatively large, with an annual average H_s of over 0.4 m in most areas. The annual average T_e in the sea area near the Pearl River estuary and the offshore area is small, between 2 s and 3 s, and the T_e of the outer sea is 5 s. The seasonal distribution of significant wave height(H_s) in the Pearl River Sea area is smaller in spring and summer and larger in autumn and winter.From the perspective of probability, statistics of the 5% and 10% of H_s and T_e in 20 years indicate that H_(s,5%) is between 1 and 2 min the coastal area of the pearl river estuary, and Dawanshan islands can reach 2 m; H_(s,10%) is 1.5 min the coastal area of the pearl river estuary, and H_(s,10%) is more than 2.5 minthe sea area of wanshan. T_(e, 5%) and T_(e, 10%)are more than 4 s in the sea.

引文

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