第二松花江干流汉阳屯站径流集中度和集中期分析

利用集中度和集中期的向量合成法分析了汉阳屯水文站径流年内分配的特征．结果表明：1）径流逐年集中度呈波动上升趋势，集中度最小和最大年份出现在1997年和2005年；2）集中度分析与传统分析方法具有客观一致性；3）1989—1993年均径流总量和集中度最低，径流的年内变化平缓，而后径流变化为“双峰型”，年内径流量变化有由秋季向春季集中的变化趋势；4）向量合成法可简明的分析径流年内分配特征．

Analysis about runoff concentration degree and centralized time of Hanyangtun station the second main current of Songhua River

Analysised the runoff characteristic of the assigns in one year of Hanyangtun station by used the concentration degree and the centralism time vector synthesis. The results indicated： 1） The year-by-year concentration degree of runoff assumed the fluctuation rise, the minimum and the muximum concentration degrees appeared in 1997 and in 2005;2） the concentration degree analysis and the tradition analysis method as the objective uniformity; 3） the yearly average total quantity and the concentration degree of the run off from 1989 to 1993 are the lowest, the ：runoff in a year changes gently, while the latter runoff change appeared ＂the twin peaks＂, and the change of the runoff amount in a year has the tendency of changing from the autumn to the spring~4） the vector synthesis may concisely analyze the assignment characteristicof the runoff in a year.