“…Besides the water-level, temperature and ice-regime-change measurements, most of the stations were also recording water discharges. The collected data have been successfully used to optimise the country's hydrological station network: the majority of modern Lithuanian hydrological stations, which have been operating for more than 60 years, were established in places proposed by Kolupaila (Gailiušis et al, 2001;Jakimavičius, 2007). In the 1940s most hydrographic researches were summarised in the fundamental works (Kolupaila, 1933b(Kolupaila, , 1936a(Kolupaila, , 1940b, which became very popular and were updated and published repeatedly (Kolupaila, 1938a(Kolupaila, , 1950.…”