Arda River (Maritsa)

Arda (Арда), Ardas (Άρδας)
The Arda at Valchi dol, Bulgaria
Map of Arda River and Maritsa river
Country	Bulgaria, Greece, Turkey
Basin features
Main source	near Smolyan, Rhodopes, Bulgaria 1,455 m (4,774 ft) (Ardin vrah)
River mouth	Maritsa, near Edirne 41°39′39″N 26°29′42″E / 41.66083°N 26.49500°E / 41.66083; 26.49500Coordinates: 41°39′39″N 26°29′42″E / 41.66083°N 26.49500°E / 41.66083; 26.49500
Basin size	5,795 km2 (2,237 sq mi)
Physical characteristics
Length	290 km (180 mi); 241 km (150 mi) in Bulgaria)

The Arda (Bulgarian: Арда, Arda, Turkish: Arda, Greek: Άρδας, Árdas) is a 290-kilometre (180 mi) long river in Bulgaria and Greece. It is a tributary of the Maritsa (Greek: Έβρος, Evros). Its source lies in the Bulgarian Rhodope Mountains near the village Arda, part of the municipality of Smolyan. It flows eastward past Rudozem, Kardzhali and Ivaylovgrad and enters Greece in the northern part of the Evros regional unit. It flows into the Maritsa on the border of Greece and Turkey, between the Greek village Kastanies and the Turkish city Edirne. In the Bulgarian section there are three hydroelectric and irrigation dams, Kardzhali Dam, Studen Kladenets and Ivaylovgrad Dam. The Bulgarian section is 241 kilometres (150 mi) long, making the Arda the longest river in the Rhodopes. The medieval Dyavolski most arch bridge crosses the river 10 kilometres (6 mi) from Ardino.

The three floods of February 18, 2005, when the water level was at 4.8 metres (16 ft), March 1 and March 7, 2005, flooded the low-lying areas, especially in the Kastanies area which turned the area into a lagoon. The merging of the waters of the Maritsa (Evros/Meriç) caused streets and buildings including homes to be flooded and people to be stranded in their homes.