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Moksha(môk`shə), river, c.375 mi (600 km) long, rising NW of Penza, central European Russia, and flowing generally NW into the Oka River. Its lower course is navigable.
a river in Penza Oblast, Mordovian ASSR (partly along the border of Gorky Oblast) and Riazan’ Oblast, RSFSR; a right tributary of the Oka River. Length, 656 km; basin area, 51,000 sq km. The Moksha takes its source on the northwestern slopes of the Volga Upland, flowing through hilly areas, and in its lower course over the Oka-Don Plain. It is fed primarily by snow. High water occurs in the upper course in April and in the lower course in April and May. Average discharge 72 km from the mouth is approximately 95 cu m per sec; least discharge is 8.5 cu m per sec, and greatest is 2,360 cu m per sec. The river freezes in November or early December and thaws in April. The main tributary is the Tsna (on the left). The Moksha is floatable and navigable from the Kadoma settlement. There are small hydroelectric power stations along the river; the cities of Temnikov and Krasnoslobodsk are located on the river.