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１９９６年江淮梅雨梅期长，梅雨量大，梅雨期暴雨频繁，属于长江中、下游流域性的洪涝年。作者通过对西太平洋副热带高压、西风急流、中高纬阻塞形势、超长波及长波的增衰演变等的研究，分析了１９９６年梅雨期的划定，并通过对历史上４０年长江中、下游梅雨总量Ｍ值（梅雨旱、涝指数）的非整数波功率谱的分析指出：１９９６年出现流域性的大涝年是符合周期演变规律的
In 1996, the plum-rainy season of the Yangtze River and the Huaihe River was large with large amounts of rainy season and heavy rains during the rainy season, belonging to the flood years of the middle and lower reaches of the Yangtze River. Based on the study of the west Pacific subtropical high, the westerly jet stream, the blockage in the middle and high latitudes, the evolution of the extra-longwave and longwave waves, the author analyzes the delineation of the Meiyu period in 1996 and analyzes the delineation of the Meiyu The analysis of the non-integer power spectrum of the total value of M (plum rain, waterlogging index) pointed out that the occurrence of basin-wide flood years in 1996 is consistent with the law of periodic evolution