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以台兰水文站1959—2008年序列实测数据为基础,利用Mann-Kendall趋势检验法和多种水文统计指标分析了台兰河径流量的年内、年际变化特征以及年径流量和四季径流量的变化趋势。结果表明:①台兰河径流量年内分配不均匀、集中度高,径流量年际变化比较稳定、C V值变幅较小,20世纪90年代后,多年平均径流量的距平变幅增大、径流量有所增大;②50 a来,台兰河年径流量呈明显上升趋势,春、夏、秋季径流量的增大趋势显著,冬季径流量的增大趋势不显著,径流量分别在1960年、1962年、1983年发生突变,20世纪90年代前径流量变化趋势不显著,之后径流量呈明显上升趋势。
Based on the measured data of the Tailan Hydrological Station from 1959 to 2008, the annual and annual variations of runoff in the Tailan River are analyzed by using the Mann-Kendall trend test and various hydrological statistical indicators as well as annual runoff and quaternary runoff The trend of change. The results show that: (1) The runoff of the Tailan River was unevenly distributed during the year with high concentration, the interannual variation of runoff was relatively stable, and the variation of CV value was small. After 1990’s, the mean annual runoff anomaly amplitude increased , And the runoff increased. (2) The annual runoff of the Tailan River increased obviously after 50 years, and the runoff of spring, summer and autumn increased significantly. The increase of runoff in winter was not significant. The runoff was In 1960, 1962 and 1983, a sudden change took place. Before the 1990s, the trend of runoff did not change significantly. After that, runoff increased obviously.