Vistula Lagoon million. However, major ecological considerations stand in the way. For example, mammal migration along the lagoon could be disrupted. Also, the inflow of brackish waters from the Baltic sea could result in serious unbalancing of the lagoon's freshwater ecosystem. From 1772 until 1918, the lagoon was part of the Kingdom of Prussia, which had become part of the German Empire in 1871. Between 1920 and 1946 it was split between Germany and the Free City of Danzig. At present state since 1945 its eastern part belongs to Russia (formerly USSR), Poland has 43.8% of its area at lagoon's western side.
Batticaloa Lagoon season. Later with the rains and with the lagoon mouth closed. The lagoon is fed by a number of small rivers. It is linked to the sea by a two narrow channels, one at Batticaloa and the other at Periyakallar. During the dry season these channels are blocked by sand bars. The lagoon is surrounded by a densely populated region used for cultivating rice, coconut and other crops. The surrounding land is used for shrimp farming and rice cultivation. The lagoon has extensive mangrove swamps and some sea grass beds. The lagoon attracts a wide variety of water birds. Batticaloa