Long-term changes in water flow of the Volga basin rivers
Long-term changes in water flow of the Volga basin rivers
复制标题
伏尔加河流域河流水流量的长期变化
DOI：
10.1051/e3sconf/202016305008
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发表时间：
2020
影响因子：
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通讯作者：
O. V. Borodin
中科院分区：
文献类型：
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作者：
I. Milyukova;A. Georgiadi;O. V. Borodin
查明了伏尔加河流域河流水流量增加和减少的长期/阶段（持续时间超过10-15年）。利用19世纪70 - 90年代至2016年6条代表性河流超过世纪观测期的年流量和季节流量（融雪洪水期、夏秋冬枯水期）。除此之外，还观察到平均径流接近正常值的时期。对比相位的边界是使用归一化的累积偏差曲线结合数据系列的统计均匀性的Student检验来确定的。这些阶段的持续时间从10年到96年不等。较低的径流阶段一般比较高的径流阶段长（这在冬季和夏秋枯水季节尤其典型）。所确定的对比阶段显示出统计上显着的差异之间的年度和季节径流。通过对一年中水文季节水量增加和减少的相位变化数据系列的分析，作者确定了伏尔加河流域内的三种主要类型的长期动态。
The long periods/phases (with a duration of more than 10-15 years) of increased and decreased water flow of rivers in the Volga river basin were identified. The annual and seasonal water flow (over snow-melt flood period, as well as summer–autumn and winter low-water seasons) of six representative rivers over observation periods more than a century in duration, starting from the 1870s–1890s up to 2016, was used. In addition to this, periods with the average runoff close to its normal value were also observed. The boundaries of contrast phases were determined using normalized cumulative deviation curves in combination with Student’s test of the statistical homogeneity of the data series. The duration of the phases varies from 10 to 96 years. The phases of lower runoff were generally longer than those of higher runoff (this is especially typical of the winter and summer–autumn low-water season). The identified contrast phases show a statistically significant difference between the annual and seasonal runoff. The analysis of the data series of alteration of phases with increased and decreased water flow in hydrological seasons of the year allowed the authors to identify three major types of their long-term dynamics within the Volga river basin.