The Oredezh (russian: О́редеж) is a

river A river is a natural flowing watercourse, usually freshwater Fresh water or freshwater is any naturally occurring liquid or frozen water containing low concentrations of dissolved salts and other total dissolved solids. Although the ...

in Volosovsky, Gatchinsky, and Luzhsky Districts in the south-western part of

Leningrad Oblast Leningrad Oblast ( rus, Ленинградская область, Leningradskaya oblast’, lʲɪnʲɪnˈgratskəjə ˈobləsʲtʲ, , ) is a federal subject of Russia (an oblast). It was established on 1 August 1927, although it was not until 1 ...

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-eigh ...

, a right

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 drainag ...

of the Luga. The length of the river is , whereas the area of its

drainage basin A drainage basin is an area of land where all flowing surface water converges to a single point, such as a river mouth, or flows into another body of water, such as a lake or ocean. A basin is separated from adjacent basins by a perimeter, ...

is . The principal tributary of the Oredezh is the Suyda (left). A cascade of hydroelectric plants was constructed on the upper course of the river in 1948. The source of the Oredezh is located in

Lake Kyurlevsky Karyer A lake is an area filled with water, localized in a basin, surrounded by land, and distinct from any river or other outlet that serves to feed or drain the lake. Lakes lie on land and are not part of the ocean, although, like the much larger ...

in the eastern part of Volosovsky District. The river flows south and crosses into Gatchinsky District. Upstream of the settlement of Batovo it turns east and flows through the urban-type settlements

Siversky Siversky (russian: Си́верский) is an types of inhabited localities in Russia, urban locality (an urban-type settlement) in Gatchinsky District of Leningrad Oblast, Russia, on the bank of the Oredezh River. Its population was The banks ...

and

Vyritsa Vyritsa (russian: Вы́рица, fi, Viiritsa) is an urban locality (an urban-type settlement) in Gatchinsky District of Leningrad Oblast, Russia, located on the bank of the Oredezh River, southwest of the town of Gatchina. Population: History ...

. At the eastern edge of Vyritsa it sharply turns to the south and accepts the Suyda from the left. It further crosses into Luzhsky District and by the selo of Milodezh turns west. The mouth of the Oredezh is at the selo of

Ploskoye Ploskoye (russian: Плоское) is a rural locality (a khutor) in Volokonovsky District, Belgorod Oblast Belgorod Oblast (russian: Белгоро́дская о́бласть, ''Belgorodskaya oblast'') is a federal subject of Russia (an ...

. The drainage basin of the Oredezh includes the southern part of Gatchinsky District and the eastern part of Luzhsky District, as well as minor areas in the east of Volosovsky District and in the southwest of

Tosnensky District Tosnensky District (russian: То́сненский райо́н) is an administrativeOblast Law #32-oz and municipalLaw #116-oz district (raion), one of the seventeen in Leningrad Oblast, Russia. It is located in the central southwestern part of ...

. Urban-type settlements of Siversky, Vyritsa, and

Druzhnaya Gorka Druzhnaya Gorka (russian: Дружная Горка) is the name of several inhabited localities in Russia. ;Urban localities *Druzhnaya Gorka, Leningrad Oblast, an urban-type settlement under the administrative jurisdiction of Druzhnogorskoye Se ...

lie in the basin of the Oredezh. A part of

Mshinskoye Boloto Zakaznik Mshinskoye Boloto Zakaznik (russian: заказник Мшинское болото) is a federal zakaznik, a nature protected area, in the northwest of Russia, located in Gatchinsky and Luzhsky Districts of Leningrad Oblast, in the basin of the ...

lies in the basin of the Oredezh, west of the river course.

References

{{Authority control Rivers of Leningrad Oblast