Lake Beloslav (Bulgarian: Белославско езеро) is a liman, which connected by the navigation canal with the Lake Varna. Before the canal was built the lake was freshwater, but not the water if brackish. The rivers Devnya and Provadiyska inflow to the Lake Beloslav. The area of the liman is about 40-10 km2, width 0.5-3.5 km, maximal depth 14 m, salinity about 10‰.