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根据黑河流域重点控制水文站莺落峡、正义峡实测月径流量观测资料,应用不均匀系数、集中度(期)、变化幅度等方法指标,分析了黑河流域径流年内变化规律;采用累积滤波器和Mann-Kendall秩相关法诊断了各月径流量的变化趋势。结果表明:①对于莺落峡站,总体上各个年代径流年内分配均呈明显的“单峰型”分布,其径流量7月达到极大值,对于正义峡站,总体上各个年代径流年内分配均呈明显的“双谷型”分布,其径流量基本上都是5月和11月达到低谷值,7月和9份到达峰值。②对于莺落峡站,不均匀性和集中程度20世纪50年代最大,2000-2008年最小,各年代最大径流量出现时间均在7月下旬;对于正义峡站,不均匀性和集中程度90年代和2000-2008年较大,60年代最小,各年代最大径流量出现时间在8月或12月。③1957年以来,莺落峡站径流量除7月呈略微减少趋势外,其余各月均呈现一定的增加趋势;正义峡站径流量除9月呈略微增加趋势外,其余各月均呈现一定的减少趋势。
According to observed data of monthly measured runoff at Yingluoxia and Zhengyi Gorge, key control hydrological stations in Heihe River Basin, the variation regularity of runoff in Heihe River Basin was analyzed by using methods such as non-uniform coefficient, concentration degree (period) and variation range. By using the cumulative filter And Mann-Kendall rank correlation method to diagnose the trend of monthly runoff. The results show that: (1) For Yingluoxia Station, the annual distribution of runoff in all years show a significant “single peak ” distribution, and the runoff reaches its maximum in July. For Zhengyixia Station, Distribution during the year showed a clear “double valley” distribution, the runoff are basically in May and November reached the trough, July and 9 peak. ② For the Yingluoxia Gorge Station, the inhomogeneity and concentration were the largest in the 1950s and the smallest in 2000-2008, and the maximum runoffs in each age occurred in late July. For the site of Zhengyi Gorge, the inhomogeneity and concentration were 90 The years and 2000-2008 larger, the smallest 60 years, each of the largest runoff occurred in August or December. ③ Since 1957, the runoff at Yingluoxia Gorge Station showed a slight increase trend except for July, and the rest of the month showed a certain increase trend. The runoff at Zhengyi Gorge Station showed a slight increase trend in September except for a slight increase in every month Reduce the trend.