Rivers, Lakes and Marshes

A country rich in water resources, Bulgaria has a large number of rivers that are divided into several regions depending on their mouth's location.
Rivers of northern Bulgaria, with the exception of the very east of the region, are typically tributaries of the Danube. Notable rivers in the area are the Iskar, Vit, Ogosta, Osam and Yantra.
The rivers in the eastern part of the country are typically short (except for Kamchiya) and flow into the Black Sea. Notable rivers in the region include the Kamchiya, Batova, Provadiyska, Devnenska, Ropotamo, Veleka and Rezovska.
Most of the rivers that rise in southern Bulgaria have their mouths in the Aegean Sea outside Bulgarian territory. A notable exception is the Iskar that takes its source from Rila and runs through Stara Planina forming a gorge to reach the Danube. Depending on their location, they are divided into two regions, a Western Aegean and Eastern Aegean one. The former embraces the Struma and Mesta, while rivers in the latter include the Arda, Maritsa and Tundzha.
Being extremely important source of ecological services for the society, of the water as a strategic resource, as well as a base for the overall ecosystem health and for the biodiversity, most of the wetlands in Bulgaria are designated as sites of the European Ecological Network NATURA2000, as Important Bird Areas, as sites under the Ramsar Convention, and Srebarna Lake - as a UNESCO World Heritage Site.
For more information: www.bspb.org
http://bspb.org/ovm/
http://en.wikipedia.org/wiki/List_of_reservoirs_and_dams_in_Bulgaria
http://en.wikipedia.org/wiki/List_of_rivers_of_Bulgaria