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该文对2007年～2011年四个年度(其中丰水年和枯水年各两年)磨刀门水道的大量观测盐度数据进行了分析,利用咸界图方法得到每年的长时间序列咸界运动特性,通过功率谱分析发现长时间序列咸界运动数据具有很好的半月周期和日周期,并通过三分法,对多个周期数据进行单周期处理分析,得到了磨刀门水道咸界运动半月周期的典型规律。对比分析每年间的咸界运动半月周期规律,发现丰、枯水年的0.5‰咸界半月周期运动存在不同的典型规律:盐水都是在小潮期间快速上溯,但丰、枯水年的盐水上溯起点位置不同,丰水年0.5‰咸界上溯距离近,在上游无滞留,基本没有咸潮灾害,而枯水年0.5‰咸界上溯天数略多,在上游滞留时间长,咸潮灾害严重。
This paper analyzes a large amount of observed salinity data of Shaodoumen waterway for four years from 2007 to 2011, of which wet and dry years are two years, and uses salty boundary map method to obtain annual long-time salty Through the power spectrum analysis, it is found that the long time sequence salty boundary motion data has good half-moon period and daily period. Through the trichotomy method, the periodic data of multiple periods are processed and analyzed. The typical law of the half-moon cycle of movement. Comparing and analyzing the law of the semiannual cycle of the salty boundary during each year, we found that there are different typical rules of the semilunar cycle movement in the 0.5 ‰ salty boundary of the abundance and the low water year. The saltwater goes up quickly during the tide, The starting point is different. In the wet years, the salinity boundary of 0.5 ‰ is close to the upstream, and there is no retention in the upper reaches. There is no saltwater disasters in the upper reaches, while 0.5 ‰ in the dry years is slightly more than in the salty boundary.