Abstract: The change of rate of discharge between Changjiang River and Jialing River (R) has great effect on their slope of water-surface, sediment transportation, shipping and flood control. This paper makes statisties for 18 years(6574 days) mean daily discharge data of both rivers. The overall and classified frequency curves of R and it's change with discharge are analyzed. Formulus for computing frequency and many characteristic values are given. This paper can be used as reference for scientific research,engineering design and analysis of other characters.

Key words: confluence, rate of confluence, interval frequency, peak frequency

摘要： 长江嘉陵江交汇口,其汇流比的变化对两江的水面比降、泥沙输移及航运、防洪等均有着极大的影响.本文统计了两江18年6574天的日平均流量资料,对汇流比总的和分级流量的频率分布及汇流比随总流量的变化、各种汇流特征值进行了全面的统计分析,绘制出规律性较强的频率分布曲线,给出了计算累积频率和区间频率的关系式,获得了平均、峰频等多种特征值,为本河段的科学研究、工程设计及其它特性的分析提供了有力的参考.

关键词: 交汇口, 汇流比, 区间频率, 峰频