中文摘要：

利用图们江干流南坪、开山屯、河东及圈河4个水文站1959-2011年径流量资料，采用差积曲线、变异系数法及功率谱分析等方法分析了各站点径流量的时序变化及周期。结果表明，图们江干流径流年际变化较大，上、中游波动剧烈，径流呈下降趋势且具有明显阶段性；根据流域特征，变异系数相对较大则径流年内分配离散，出现两极分化，易发生旱涝灾害。下游河东与圈河两站1961、1965、1979、1995年的变异系数较大，根据延边朝鲜族自治州水利志记载，同期历史上均有不同程度的旱涝灾害发生，因此，变异系数可以作为衡量径流时间分配的一个指标。图们江干流流域径流主要存在32年显著变化周期，上游和下游还存在短周期，中游存在64年长变化周期。

英文摘要：

The data of runoff volume from 1959 to 2011 about four hydrometric station of Nanping,Kaisha- ntun, Hedong and Quanhe in Tureen river main stream are collected for use the method of deviation curve, variation coefficient and power spectrum analysis method to analsis the temporal change and periodicity of runoff. The results showed that the runoff volume in a decrease trend and has obvious stage. Annual vari- ation of Tumen river main stream was large, fluctuation of the upper and middle reaches severe. Accord- ing to the characteristics of river basin, as variation coefficient is bigger as runoff distribution of annual discrete, the polarization appeared and prone to droughts and floods. In 1961.1965.1979 and 1995 ,the var- iation coefficient at Hedong and Quanhe hydrometrie station is bigger,at the same period,according to the record of Yanbian Korean Autonomous Prefecture Water Conservancy there are floods with different level, therefore, variation coefficient can be as an indicator to measure runoff time allocation. There was a 32- year periodicity of runoff volume change in the Tureen river main stream beyond that there also was a short periodicity in upper and lower reaches, and a 64 year one in the middle reaches. Look forward to af- ford scientific basis for manage and allocate of water resource in this district.