Landsat satellite photo showing Świna and the Piast canal to the west of it
The German Empire dammed and deepened the river from 1874-1880 to create the Kaiserfahrt (Piast canal).  It connects the northern part of the Świna directly with the Szczecin Lagoon and the Pomeranian harbor of Szczecin (Stettin). The river thus gained importance as a direct waterway to the industrial city. The territory along the river's path was transferred from Germany to Poland following World War II.
The inverted delta was formed by the floods of Świna River in the area of the Wolin National Park in 1996. This water-muddy natural complex forms an archipelago of 44 islands and canals with changing directions of water flow. The Delta Świna River was formed by the Scandinavian glacier that withdrew from this territory 12 thousand years ago. During the western and northern storms sea water flowed into the Bay of Szczecin, overflowing the islands. The borders of islands are constantly shaped during the process of accumulation.