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本文采用ADI方法,取海底拖曳系数k=0.67×10~(-3),对杭州湾M_2潮进行数值模拟,算得逐太阴时潮位和潮流以及其调和常数。计算结果和实测值基本一致。本区的M_2潮具有自东向西的分布和变化规律,潮汐振幅和潮流最大流速均在湾顶附近最大,分别为2.40米和2.3米/秒左右;湾口南部为最小,分别为0.8米和1.0米/秒左右。高(低)潮时及最大流速发生时间湾顶比湾口各推迟2及1.5—2太阴时。潮流椭圆长轴方向基本与湾形走向相吻。文中还给出杭州湾海面涨落过程透视图。
In this paper, the submarine tow coefficient k = 0.67 × 10 ~ (-3) is adopted to simulate the M_2 tide in Hangzhou Bay by ADI method. Calculation results and the measured values are basically the same. The M_2 tide in this area has the distribution and variation trend from east to west. The tidal amplitude and the maximum tidal velocity are both the highest near the top of the bay, about 2.40 m and 2.3 m / s, respectively; the southern part of the bayou is the smallest at 0.8 m and 1.0 m / s or so. High (low) tide and the maximum flow rate occurred Bay to Bay than postponed 2 and 1.5-2 lunar time. The direction of the major axis of the trend of oval kiss with the basic shape of the bay. The article also gives a perspective view of the Hangzhou Bay sea surface fluctuations.