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 Districts 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. 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. Urban-type settlements of Siversky, Vyritsa, and
Druzhnaya Gorka lie in the basin of the Oredezh. A part of
Mshinskoye Boloto Zakaznik lies in the basin of the Oredezh, west of the river course.
References
{{Authority control
Rivers of Leningrad Oblast