Open AccessLong-term dynamics of maximum flood water levels in the middle course of the Ob River
Author(s) -
В. А. Земцов,
Д. А. Вершинин,
Vadim Khromykh,
O. V. Khromykh
Publication year - 2019
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/400/1/012004
Subject(s) - flood myth , homogeneity (statistics) , homogeneous , floodplain , hydrology (agriculture) , water level , environmental science , series (stratigraphy) , outlier , geography , physical geography , geology , statistics , mathematics , cartography , geotechnical engineering , archaeology , paleontology , combinatorics
Results of statistical analysis of the long-time series of flood maximum water levels in the Ob River middle course (West Siberia, Russia) are presented. Most time series are statistically non-homogeneous at the 5 % level of significance. In most cases, there is a violation of homogeneity in 1959 due to the Novosibirsk HPP flow regulation, but there might be also some natural change. The extremely low maximum levels of 2012 are the “outliers” from probability distribution functions at 5% significance level. In the modern period (after 1959), some downward tendencies in maximum water level change over the middle course of the Ob River cause decrease in the area, depth and duration of floodplain inundation.