Dzherman
General data
- Name: Dzherman
- Water system: Struma (Strymonas)
- Water type: River
- Progression: Struma (Strymonas) -> Aegean Sea -> Mediterranean Sea -> Atlantic Ocean -> Planet Earth
- Climates: Subtropical
- Continents: Europe
- Countries: Bulgaria
The Dzherman is a river in south-western Bulgaria, a left tributary of the Struma, flowing through the municipalities of Sapareva Banya, Dupnitsa and Boboshevo in Kyustendil Province. The river is 47.8 km long and drains the northwestern sections of the Rila mountain range.
The Dzherman takes its source from the Tear Lake, the highest one of the Seven Rila Lakes group in the western part of Rila at an altitude of 2,535 m. It then flows though the Twin Lake and the Trefoil Lake before continuing in northeastern direction, where it is joined by a stream flowing from the two lowermost lakes of the group, the Fish and the Lower Lakes. Within Rila, the river flows in a heavily forested deep glacial valley with a number of rapids and waterfalls. It flows into the Struma, at an altitude of 369 m, east of the town of Boboshevo. Its catchment area covers a territory of 392 km². The highest waterfalls in Rila are situated in the Dzherman catchment area — Skakavitsa (70 m) and Goritsa (39 m).
The Dzherman has predominantly snow-rain feed with high water in late spring and early summer (May–June) and low water in summer (July–September).
