The study of long-term fluctuations in the dates of ice formation and ice destruction in the rivers of the Votkinsk reservoir catchment

[摘要] A statistical analysis of the dates of ice formation and ice destruction in the rivers of the Votkinsk reservoir catchment was carried out, including testing the hypothesis of randomness for both the full series of observations and their parts; autocorrelation diagnostics of the time series; verification of the homogeneity hypothesis of the series of observations and the aggregate index. The results indicate that there are statistically significant changes in the ice formation and ice destruction dates occurring in recent years in the rivers of the Votkinsk reservoir catchment.

[发布机构] Perm State University, 15, Bukireva str., Perm; 614990, Russia^1

[学科分类] 自然科学（综合）

[关键词] Ice formations;Reservoir catchments