福建省三条主要河流洪水序列周期特性分析

Periodic Analysis of Long-Term Flood Process for Three Main Rivers in Fujian Province

采用功率谱和方差分析法，对福建省三条主要河流的洪水序列进行周期分析．为论证所得 周期的稳定性和可靠性，文中提出一种计算具有历史调查洪水资料的不连序序列周期的方差分析 法．并用历史调查洪水资料进行计算．结果表明：闽江流域长期洪水过程有一个７年显著的周期，九 龙江和晋江流域分别为６年和１５年．

In this paper,power spectrum and variance analysis are used to calculate the flood periods of the three main rivers or Fujian Province. A new variance analysis method which can be used for flood series with historical floods is also presented to demonstrate the reliabili- ty and stability of the periods analysed. Results show that there are a significant and stable 7 years major flood period at the Min Jiang river basin and a 6 years and 15 years at the Jiulong Jsiang and Jin Jiang river basin respectively. The results are also discussed in details.