ASYNCHRONY IN FLUCTUATIONS OF THE MAXIMUM WATER LEVELS OF THE RIVERS IN THE BELARUSIAN POLESIE AND THE BELARUSIAN LAKELAND DISTRICT

Abstract

A comparative analysis of the maximum water levels formation of the rivers in the Belarusian Lakeland and the Belarusian Polesie for the period from 1946 to 2015 was carried out. Three periods were studied: from 1946 to 1965 – the period before the start of mass reclamation, i.e. the period of minimal anthropogenic impacts, can be conditionally accepted as a natural water regime, from 1966 to 1987 – the period of mass reclamation, from 1988 to 2015 – the period of modern climatic impacts. The methodological basis of the research was the scientific provisions on the stochastic nature of the variability of the river level regime and the comparative geographical method.
It is established that for the rivers of the Belarusian Lakeland there is a steady tendency to decrease the maximum water levels at a rate of -31 cm / 10 years in general for the entire period under review, while there is a slight decrease for the rivers of the Belarusian Polesie.