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基于开都河流域巴音布鲁克气象站和大山口水文站1960-2007年的逐月降水和径流数据,文中通过采用集中度与集中期为量化指标,对开都河流域降水和径流的年内分配变化以及两者变化的同步性进行了研究。结果表明:(1)不同年代降水与径流年内分配各自具有明显的差异,80年代夏季降水量与夏季径流量显著偏小,而2000-2007年却显著偏大,同时这时期年径流量显著增多、最大径流量出现时间较其他年代有所推迟;(2)近48年来,降水量和径流量的集中度都有缓慢的下降趋势,两者的年际变化有很好的同步性。降水量和径流量的集中期有微弱的上升趋势,但它们的同步性较差;(3)不同年代冬季降水量与同期径流量变化是不同步的,而年内其他季节,径流量分配过程主要依赖于降水量变化,降水和径流峰值表现出了很强的同步性。
Based on the monthly precipitation and runoff data from Bayinbuluke meteorological station and Dashankou hydrological station from 1960 to 2007 in the Kaidu River basin, the paper uses the concentration and concentration periods as the quantitative indicators to analyze the distribution of precipitation and runoff in the Kaidu River basin Changes and the synchronization between the two changes were studied. The results showed that: (1) There was a significant difference in annual distribution of precipitation and runoff in different years. The summer precipitation in the 1980s was significantly smaller than that in summer, but significantly larger in 2000-2007, and the annual runoff increased significantly And the time of maximum runoff has been postponed compared with that of other years. (2) In the past 48 years, the concentration of precipitation and runoff has a slow downward trend, and the interannual variation between the two has a good synchronization. There was a slight upward trend in the concentration of precipitation and runoff, but their synchronicity was poor. (3) The winter precipitation in different years did not change synchronously with the runoff in the same period. In other seasons during the year, the distribution of runoff was mainly Depends on the precipitation changes, precipitation and runoff peak showed a strong synchronization.