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基于集中度与集中期的图们江流域径流年内分配研究
引用本文:赵春子,黄微,朱卫红. 基于集中度与集中期的图们江流域径流年内分配研究[J]. 延边大学学报(自然科学版), 2010, 36(3): 275-278
作者姓名:赵春子  黄微  朱卫红
作者单位:延边大学理学院,地理系,吉林,延吉,133002 
基金项目:国家自然科学基金资助项目,延边大学科研项目 
摘    要:利用向量合成法,对1959—2005年间图们江干流代表水文站的逐年逐月径流量进行统计分析,并计算近期平均集中程度和最大径流量的出现时间.结果表明:1)在20世纪60—70年代间,图们江流域径流集中度逐渐下降,80年代后开始整体呈上升趋势,其中上游的集中度变化幅度最大,中游的平均集中度最低,下游的平均集中度最高.2)在20世纪60—90年代间,图们江流域径流集中期逐渐提前,整体集中期约提前10 d;21世纪后,集中期较20世纪90年代推迟约3 d,上中游在7月和9月出现了"双峰型"的集中期特征.

关 键 词:图们江  年内分配  径流集中度  径流集中期

A Study on Annual Runoff Distribution in Tumen River Based on Degree and Time of Concentration for Rivers
ZHAO Chun-zi,HUANG Wei,ZHU Wei-hong. A Study on Annual Runoff Distribution in Tumen River Based on Degree and Time of Concentration for Rivers[J]. Journal of Yanbian University (Natural Science), 2010, 36(3): 275-278
Authors:ZHAO Chun-zi  HUANG Wei  ZHU Wei-hong
Affiliation:(Department of Geography,College of Sciences,Yanbian University,Yanji 133002,China)
Abstract:The mean concentration degree and the concentration period were computed and analyzed by using the observed monthly streamflow of key hydrological control stations in Tumen River from 1959 to 2005 based on vector composition.The results indicated that : 1) The concentration degree in Tumen River basin decreased in 1960 s—1970 s and increased from 1980 s;the concentration degree has changed most in the upper reaches,the maximum mean concentration degree showed in the middle reaches,and the minimum showed in the lower reaches.2) Generally the concentration period forewent about 10 d during 1960 s—1990 s;after the entered the 21 st century,the concentration period deferred about 3 d compared with 1990 s',and exhibited obvious "double peak" in the middle and upper reaches in July and Septemper.
Keywords:Tumen River  annual distribution  runoff concentration degree  runoff concentration period
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