摘要
根据2011—2012年在平潭东部海坛湾海域“浪龙”(AWAC)的实测波浪数据,统计分析得到该海域的波浪特征。海坛湾海域全年的波向主要集中在NE-E-SE向,常浪向为ENE向,频率为67.56%。强浪向为E向,H 1/10波高最大值为5.73 m。全年波高以3级浪为主,年出现频率为41.97%。H 1/10波高主要集中在0.40~2.20 m之间,所占频率为68.70%,周期主要集中在2.0~7.0 s,所占频率为98.20%。利用实测资料通过能量谱积分计算分析该海域的波浪能情况,波浪能的大小以波功率密度(P w)表示。P w具有明显的季节性变化特征,秋冬强,春夏弱,秋冬季P w平均值可达8.50~10.00 kW/m。P w年平均值在5.50 kW/m左右,表明该海域为波浪能较丰富区。将实测波浪数据应用于波浪能经验公式计算式时,不同波要素组合下的P w近似公式其比例系数(α)不同,计算结果表明,H s-T 1/10和H s-T z波要素组合计算P w为优选,其对应的α值分别为0.34和0.45。
Based on the wave data measured by AWAC from 2011 to 2012 in Haitan Bay of eastern Pingtan sea,the wave characteristics of the sea area were obtained statistically.The annual wave direction of Haitan Bay mainly concentrats in NE-E-SE direction and the constant wave direction is ENE with a frequency of 67.56%.Strong wave direction is in E direction and the max H 1/10 wave height is 5.73m.In the whole year,the wave height is mainly 3-level wave,and the annual frequency is 41.97%.The H 1/10 wave height mainly concentrats between 0.40 and 2.20 m with the frequency of 68.70%.The period mainly concentrats in 2.0~7.0 s with frequency of 98.20%.The wave energy of the sea area is calculated and analyzed by the energy spectrum integration based on the measured data.The wave energy is presented by the wave power density P w.P w has obvious seasonal variation characteristics which are strong in autumn and winter and weak in spring and summer.The average P w in autumn and winter can reach 8.50~10.00 kW/m.The annual average value of P w is about 5.50 kW/m,indicating that the sea area is rich in wave energy.When the measured wave data is applied to the empirical formula of wave energy,the proportional coefficientαof P w approximation formula is different under different wave factor combinations.The calculation results show that the calculated P w with H s-T 1/10 combination and H s-T z combination are the best choice and their correspondingαvalues are 0.34 and 0.45,respectively.
作者
吴迪茜
陈智杰
WU Di-xi;CHEN Zhi-jie(Third Institution of Oceanography,MNR,Xiamen 361005,China)
出处
《应用海洋学学报》
CSCD
北大核心
2021年第2期293-302,共10页
Journal of Applied Oceanography
基金
海洋公益性行业科研专项资金资助项目(201405025)。
关键词
物理海洋学
波浪能
波功率密度
波浪特征
平潭海域
physical oceanography
wave energy
wave power density
wave characteristic
Pingtan sea area
