Usta River (Russia)

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The Usta (Russian Уста, mari Ышта ) is a left tributary of the Vetluga in the Kirov Oblast and the Nizhny Novgorod Oblast in northwestern Russia.

It rises south-east of Schachunja on the border between the Oblast Kirov and Nizhny Novgorod Oblast. It flows a few kilometers inside the Kirov Oblast. The Usta flows in a predominantly westerly direction by the Novgorod Oblast. They passed the small town Uren and turns in their downstream to the south. After 253 km it meets the south -flowing also Vetluga. The Usta drains an area of ​​6030 km ². The river is covered from November to April of a layer of ice. The snow melt makes a significant contribution to the total annual runoff. 47 km above the mouth of the mean discharge 28 m³ / s