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采用水文时间系列的逐项分析法,统计分析了近百年来长江洪水变化的总体趋势与主要周期,发现近百年来长江洪水变化存在增大的总体趋势,并有40a,35a等主要周期变化.这与近百年气候的趋暖性变化及太阳活动的周期性强弱变化有关.
Using the item-by-item analysis of hydrological time series, the general trends and main periods of the Yangtze River floods over the past 100 years were statistically analyzed. The general trend of the Yangtze River floods over the past 100 years was found. There were major period changes such as 40a and 35a. This is related to the changes in the warmth of the past century and the periodic changes in the solar activity.