Prior to the opening of the Sió-sluice in 1863, the water level of Lake Balaton was determined by the prevailing weather conditions. The fluctuation of water level could be as high as 3-4 meters which means that the “Hungarian Sea” had even floods. In the first part of the 19th century the water level of the lake was lowered in several steps which caused of the higher areas of the Kis-Balaton basin to dry out.
Complete construction of the Kis-Balaton Water Protection System is still in process.
With regards of the nature conservational and water aims, experts are trying to find a solution in which improvement of water quality continues, but the developed habitats remain too and broaden further