because of the flexuous coastal line and the diverse topography of zhejiang province, nested grid method is used to simulate the interested research area with fine grids of 1'1 ", and analyses the whole area of bohai sea, yellow sea and east china sea, including the seas adjacent to zhejiang, with wide grids of 10'10 " . the opening boundary condition of the small area is obtained from the calculation results in large area 针对浙江近海岸线曲折,地形多变的特点,引入网格嵌套技术,对我们感兴趣的研究区域采用11细网格进行计算,而对包括浙江近海在内的整个渤、黄、东海大区域则用1010粗网格;其中,小区域的开边界条件由大区域的计算结果来提供。