基于海洋模型SWAN建立广东近海海域高分辨率波浪数值模型,并利用波浪观测资料对模型进行验证,良好刻画了广东近海海域波浪能资源特征。选取粤东海上风电基地海域重点研究波浪能年际变化和方向分布,并探讨该处各季节风浪及涌浪有效波高和平均周期特性。结果表明：广东海域波浪能资源呈东南-西北递减趋势,具有较强的季节变化性,秋冬两季大部分海域波浪能功率密度大于6 kW/m,春夏两季多大于2 kW/m;平均周期冬季较大,大部分海域介于5.5~7.0 s,秋、春季次之,夏季偏小,多低于6.0 s。粤东海上风电基地全年波浪能来向主要为E-NE向区间,5、6、9月份平均有效波高值较小,中位值及平均值在0.7~0.9 m区间。冬季有效波高平均值在1.3~1.6 m范围内,其中12月份平均值最高,能量周期在5、6月份最小,平均值约5.1 s。此外,该处波浪冬季由风浪主导,夏季由涌浪主导,各季节平均周期涌浪较风浪高约3.0 s。
Abstract
Based on the ocean model SWAN, the validation results suggested that the model can effectively represent the wave energy characterization in this region. The sea area of Guangdong East Offshore Wind Power Base was selected to focus on the wave energy inter-annual variation and directional distribution, and to explore the significant wave height and mean period characteristics of wind waves and swell waves in all seasons. The results show that the wave energy resource in the study area show a decreasing trend from southeast to northwest with strong seasonal variability. The power density is more than 6 kW/m in most of the sea area in winter and fall, and more than 2 kW/m in spring and summer. The average period in winter is between 5.5-7.0 s in most of the study area, and mostly lower than 6.0 s in summer, which is the smallest. Guangdong East offshore wind power base is mainly in E-NE wave direction throughout the year, and the average effective wave height value is small in May, June and September, with the median and average value in the range of 0.7-0.9 m. and the energy period is the smallest in May-June, with an average value of about 5.1 s. In addition, the waves in this area are dominated by wind waves in winter and swell waves in summer, and the average period swell waves are about 3.0 s higher than wind waves in all seasons.
关键词
波浪能 /
资源评估 /
SWAN /
广东近海 /
风浪 /
浪涌
Key words
wave energy /
resource assessment /
SWAN model /
Guangdong offshore /
wind wave /
swell
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基金
中国大唐集团有限公司科技项目（DTGD-2023-10174）
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