LONG-TERM DYNAMICS OF THE MAIN HYDROMETEOROLOGICAL CHARACTERISTICS OF SPRING FLOOD IN THE DESNA RIVER’S BASIN

Gorbachova Liudmyla , Kolianchuk Olga  

Ukrainian Hydrometeorological Institute, Kyiv, Ukraine

Abstract

This paper presents the results of the long-term variations complex analysis of the spring flood hydrometeorological characteristics in the Desna river basin. Research based on an assessment of homogeneity, stationarity and cyclical fluctuations of the observations data. Analysis were carried out for the following data: maximum spring flood water discharges, the maximum water equivalent of snow cover, the sums of negative and positive air temperatures in winter and the sums of precipitation for the spring floods period. The stationarity of the hydrometeorological characteristics was researched on the base of the estimation of the linear trends significance at the 5% significance level. Phases of cyclical fluctuations of hydrometeorological characteristics based on the difference-integral curves were analyzed. The homogeneity of the observations data was determined by the total integral curve.

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