Flood frequency analysis of Lithuanian rivers

Abstract

Numerous hydrological data derived from water measurement stations enables us to perform direct statistical analysis of river runoff characteristics. Recently Lithuanian hydrologists pay great attention to analysis of spring flood, as a very special hydrological regime phase. Many studies concerning the main spring flood parameters, their spatial and temporal variability, timing trend analysis, climate change impact on spring flood events are already performed. In this study a probabilistic behavior of floods was studied. Analysis of different flood frequency distributions using longterm data of 32 water measurement stations was performed in order to estimate the best fit distributions for Lithuanian conditions. For evaluation of climate change impact, the assessment of flood frequency distributions for different periods was accomplished.