祁连山区三大内陆河近50年来出山径流特征分析

利用祁连山区三大内陆河的出山径流控制站——杂木寺、莺落峡和昌马堡水文站1956-2006年的实测月年径流数据系列,应用数值分析、Mann-Kendall非参数检验、Hurst指数分析等多种方法,分析了祁连山区出山径流近51年的年际变化特征。结果表明:三大水系的径流年际变化中,都存在突变时刻,但具体年份不同;径流总趋势为石羊河在减少,特别是20世纪90年代的降幅很大,黑河和疏勒河为增加的趋势,疏勒河在1997年发生了由小变大的显著突变;指数分析表明黑河的持续性最强,石羊河最弱。

Analysis of the features of the mountainous runoff in three inland river basins of Qilian mountain during recent 50 years

Based on the runoff data of three inland rivers from the control hydrologic stations for mountainous runoff(Zamusi,Yingluoxia,Changmapu) from 1956 to 2006,the numerical method,Mann-Kendall nonparametric test,Hurst index analysis methods were used to analyze the annual variation of runoff in recent 50 years.The results showed that there was marked runoff change in record series but in different years;Shiyang River had a decreasing tendency especially in the 1990s,runoff of Heihe River and Shule River were in...