The Oredezh () is a

river A river is a natural stream of fresh water that flows on land or inside Subterranean river, caves towards another body of water at a lower elevation, such as an ocean, lake, or another river. A river may run dry before reaching the end of ...

in Volosovsky, Gatchinsky, and

Luzhsky District Luzhsky District () is an administrativeOblast Law #32-oz and municipalLaw #65-oz district (raion), one of the seventeen in Leningrad Oblast, Russia. It is located in the southwest of the oblast and borders with Gatchinsky District in the north, T ...

s in the south-western part of

Leningrad Oblast Leningrad Oblast (, ; ; ) is a federal subjects of Russia, federal subject of Russia (an oblast). The oblast has an area of and a population of 2,000,997 (2021 Russian census, 2021 Census); up from 1,716,868 recorded in the 2010 Russian census ...

Russia Russia, or the Russian Federation, is a country spanning Eastern Europe and North Asia. It is the list of countries and dependencies by area, largest country in the world, and extends across Time in Russia, eleven time zones, sharing Borders ...

, a right

tributary A tributary, or an ''affluent'', is a stream or river that flows into a larger stream (''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 into which they ...

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

drainage basin A drainage basin is an area of land in which 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 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 and

Vyritsa Vyritsa (, ) is an types of inhabited localities in Russia, 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: His ...

. 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. 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 () is an administrativeOblast Law #32-oz and municipalLaw #116-oz district (raion), one of the administrative divisions of Leningrad Oblast, 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 () 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 Settlement Municipal Formation in Ga ...

lie in the basin of the Oredezh. A part of

Mshinskoye Boloto Zakaznik Mshinskoye Boloto Zakaznik () 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 Luga River. It was established in 1982 to protect the ...

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

References

{{Authority control Rivers of Leningrad Oblast