Abstract

The results of studying long-term (lasting 10–15 years or more) phases of decreased and increased conditionally natural annual and seasonal runoff of the Don River near the village of Razdorskaya and the Lena River near the village of Kyusyur are considered. The retrieval of long-term water flow time series (excluding the changes that are caused by anthropogenic impacts from the observed water flow) is based on the transformation of the annual hydrograph of average daily water flow using the Kalinin–Milyukov method. The long-term phases of annual and seasonal runoff have been identified on the basis of cumulative deviation curves and criteria for statistical homogeneity of time series by their averages. For the entire period of observations on the Don (1891–2019) and the Lena (1936–2019), two cardinally different types of long-term dynamics for contrasting phases of annual and seasonal runoff that are characteristic of these rivers and common in most of Russia have been revealed. On the Lena, the phases of decreased and increased values of annual and seasonal runoff have changed quasisynchronously, whereas on the Don, the phases of annual runoff and snow melt flood runoff on the one hand and summer-autumn and winter runoff on the other hand have changed asynchronously. The main characteristics of the contrast phases have been determined.

中文翻译：

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19-21 世纪顿河和勒拿径流增加和减少的长期阶段的特征

摘要

考虑了 Razdorskaya 村附近的顿河和 Kyusyur 村附近的勒拿河有条件自然年和季节性径流减少和增加的长期（持续 10-15 年或更长）阶段的研究结果。长期水流时间序列的反演（不包括观测水流中人为影响引起的变化）是基于使用Kalinin-Milyukov方法对年平均日水流量过程线进行变换。年径流和季节径流的长期阶段是根据累积偏差曲线和时间序列平均值统计同质性标准来确定的。在对顿河（1891-2019）和勒拿河（1936-2019）的整个观测期间，年径流和季节性径流的对比阶段存在两种基本不同类型的长期动态，这是这些河流的特征，并且在大多数河流中都很常见。俄罗斯的情况已经曝光。在勒拿河上，年径流和季节径流减少值和增加值的相位准同步变化，而在顿河，一方面是年径流和融雪洪水径流，另一方面是夏秋季和冬季径流。已异步更改。对比相的主要特征已经确定。