The Vacha is a river in south Bulgaria

Bulgaria

Bulgaria , officially the Republic of Bulgaria , is a parliamentary democracy within a unitary constitutional republic in Southeast Europe. The country borders Romania to the north, Serbia and Macedonia to the west, Greece and Turkey to the south, as well as the Black Sea to the east...

, one of the main right tributaries of the Maritsa

Maritsa

The Maritsa or Evros , ) is, with a length of 480 km, the longest river that runs solely in the interior of the Balkans. It has its origin in the Rila Mountains in Western Bulgaria, flowing southeast between the Balkan and Rhodope Mountains, past Plovdiv and Parvomay to Edirne, Turkey...

. It is 105 km long and is formed by the confluence of the Shirokolashka reka and the Byunovska reka. The river passes through Krichim Dam and Vacha Dam

Vacha Dam

Vacha is a dam situated in south Bulgaria, Devin municipality, 680 m above sea level.It is located near the road from Krichim to Devin....

 that secure drinking water for Plovdiv

Plovdiv

Plovdiv is the second-largest city in Bulgaria after Sofia with a population of 338,153 inhabitants according to Census 2011. Plovdiv's history spans some 6,000 years, with traces of a Neolithic settlement dating to roughly 4000 BC; it is one of the oldest cities in Europe...

 and its plains. The Vacha runs through the Rhodopes forming a deep valley where the two dams are located. An important town in the valley is Devin

Devin, Bulgaria

Devin is a town in Smolyan Province in the far south of Bulgaria. It is the administrative centre of the homonymous Devin Municipality. As of December 2009, the town has a population of 7,054 inhabitants.-Location and geography:...

.

It is the second largest river that has its source in the Rhodopes after the Arda. The Vacha does not flow close to any industrial enterprises, which is the reason for its clear water. The origin of its valley is similar to that of the Chepelare River

Chepelare River

The Chepelare River is a river in Bulgaria that takes its source from Rozhen Peak in the Rhodopes. The river's length is about 87 km and two hydroelectric plants are constructed on it, with a total maximum power of 2,400 kW.The Chepelare River runs through the town of Chepelare, the Bachkovo...

.