江苏沿海波浪多重嵌套模拟研究

根据24年CCMP风场资料和江苏沿海4个方向(N、NE、E和SE)百年一遇风速,构建西北太平洋、东中国海和江苏沿海上述4个方向的百年一遇风场。首次建立一个基于第三代海浪模型SWAN的自西北太平洋、东中国海至江苏沿海的三重嵌套数值模型,以AVISO卫星观测数据和江苏沿海定点实测数据进行验证。以三个计算域4个方向百年一遇风场为驱动风场,驱动该多重嵌套模型,高精度数值模拟江苏沿海4个方向百年一遇有效波高分布并进行分析。结果表明,江苏沿海辐射沙洲地形对有效波高分布影响显著;E向百年一遇风场作用下海域有效波高最大,NE向次之,N向和SE较小。

Study on multiple-nested simulation of waves along Jiangsu coast

Wind field with a 100-year return period in Northwest Pacific, East China Sea and Jiangsu Coast in four directions of North, Northeast, East and Southeast is built with CCMP wind data of 24 years and wind speed with a 100-year return period along Jiangsu coast in each direction as mentioned above. Based on the third-generation wave model SWAN, a multiple-nested simulation model is built in three levels of nested domains from Northwest Pacific, East China Sea to Jiangsu coast for the first time and verified with AVISO satellite data and measured data at fixed points along Jiangsu coast. Using wind field with a 100-year return period in these three domains in four directions as the driving wind field of this multiple-nested simulation model, the distribution of significant wave height with a 100-year return period along Jiangsu coast can be simulated with high accuracy. It is concluded that the radial sandbanks along Jiangsu coast affect the distribution of significant wave height obviously; significant wave height is generally the largest under the effect of East wind field with a 100-year return period, Northeast the second, North and Southeast the least.