// Workers AI · dad joke modeWhat did the Sumka river say? I'm drained.

Sumka
Location
Country	Tatarstan, Russia
Physical characteristics
Source
• location	Gremyachy Klyuch, Zelenodolsky District
• coordinates	55°58′54″N 48°58′16″E
Mouth	Volga
• location	Kuybyshev Reservoir near Vasilyevo, Zelenodolsky District
• coordinates	55.8293°N 48.6464°E / 55.8293; 48.6464
• elevation	53 m (174 ft)
Length	37 km (23 mi)
Basin size	250 km2 (97 sq mi)
Basin features
Progression	Volga→ Caspian Sea

The Sumka (Russian: Сумка; Tatar: Сумка) is a river in Zelenodolsky District of the Republic of Tatarstan, Russia, a left-bank tributary of the Volga. It is 37 kilometres (23 mi) long, and its drainage basin covers 250 square kilometres (97 mi²). It begins near Gremyachy Klyuch and flows to the Kuybyshev Reservoir, Volga, forming the western border of Vasilyevo, Tatarstan.

The river valley comes through the Raifa section of the Volga-Kama Reserve. There the Sumka passes several major lakes, the biggest being Raifa lake. The maximal mineralization 200 mg/L. The maximal water discharge is 30 cubic metres per second (1,100 cu ft/s). The river used to dry up in summer.