The Protva () is a river in

Moscow Moscow ( , US chiefly ; rus, links=no, Москва, r=Moskva, p=mɐskˈva, a=Москва.ogg) is the capital and largest city of Russia. The city stands on the Moskva River in Central Russia, with a population estimated at 13.0 million ...

and

Kaluga Oblast Kaluga Oblast (russian: Калу́жская о́бласть, translit=Kaluzhskaya oblast) is a federal subject of Russia (an oblast). Its administrative center is the city of Kaluga. The 2021 Russian Census found a population of 1,069,904. G ...

s in

Russia Russia (, , ), or the Russian Federation, is a transcontinental country spanning Eastern Europe and Northern Asia. It is the largest country in the world, with its internationally recognised territory covering , and encompassing one-ei ...

, left

tributary A tributary, or affluent, is a stream or river that flows into a larger stream or main stem (or parent) river or a lake. A tributary does not flow directly into a sea or ocean. Tributaries and the main stem river drain the surrounding drai ...

of the

Oka Oka or OKA may refer to: Cars * Oka (automobile), a small car designed by AvtoVAZ and produced by ZMA and SeAZ * OKA 4wd, a large 4-wheel-drive vehicle made in Western Australia by OKA Military * 2B1 Oka, Soviet 420 mm self-propelled mort ...

. It is long, and has a drainage basin of .«Река ПРОТВА»
Russian State Water Registry The area of its basin is . The Protva freezes up in early December and stays icebound until early April. Its main tributary is the

Luzha The Luzha (russian: Лужа), a river in Kaluga Oblast in Russia, originates in Moscow Oblast. It is a right tributary of the Protva (in the Oka Oka or OKA may refer to: Cars * Oka (automobile), a small car designed by AvtoVAZ and produce ...

. The towns of

Vereya Vereya (russian: Верея) is the name of several inhabited localities in Russia. ;Urban localities *Vereya, Naro-Fominsky District, Moscow Oblast, a town in Naro-Fominsky District of Moscow Oblast ;Rural localities * Vereya, Orekhovo-Zuyevsky ...

, Borovsk, Protvino and

Obninsk Obninsk (russian: О́бнинск) is a city in Kaluga Oblast, Russia, located on the bank of the Protva River southwest of Moscow and northeast of Kaluga. Population: History The history of Obninsk began in 1945 when the First Research In ...

are located on the shores of the Protva.

References

Rivers of Kaluga Oblast Rivers of Moscow Oblast {{Russia-river-stub