Sestra River is a
riverA river is a natural watercourse, usually freshwater, flowing toward an ocean, a lake, a sea or another river. In a few cases, a river simply flows into the ground or dries up completely before reaching another body of water...
in
Saint PetersburgSaint Petersburg is a city and a federal subject of Russia located on the Neva River at the head of the Gulf of Finland on the Baltic Sea. The city's other names were Petrograd and Leningrad...
and
Leningrad OblastLeningrad Oblast is a federal subject of Russia . It was established on August 1, 1927, although it was not until 1946 that the oblast's borders had been mostly settled in their present position. The oblast was named after the city of Leningrad. The first governor of Leningrad Oblast was Vadim...
,
RussiaRussia , officially known as both Russia and the Russian Federation , is a country in northern Eurasia . It is a semi-presidential republic, comprising 83 federal subjects...
.
The length of the river is 74 km (46 mi). The area of its
basinA drainage basin is an extent of land where water from rain or snow melt drains downhill into a body of water, such as a river, lake, reservoir, estuary, wetland, sea or ocean...
is 393 km² (152 mi²). The Sestra River flows over the
Karelian IsthmusThe Karelian Isthmus is the approximately 45–110 km wide stretch of land that connects Russia to Finland, situated between the Gulf of Finland and Lake Ladoga in northwestern Russia, to the north of the River Neva...
. It used to fall into the
Gulf of FinlandThe Gulf of Finland is the easternmost arm of the Baltic Sea that extends between Finland and Estonia all the way to Saint Petersburg in Russia, where the river Neva drains into it. Other major cities around the gulf include Helsinki and Tallinn...
until the early 18th century. After the construction of a
damA dam is a barrier that impounds water or underground streams. Dams generally serve the primary purpose of retaining water, while other structures such as floodgates or levees are used to manage or prevent water flow into specific land regions...
for the needs of the munitions factory in
SestroretskSestroretsk is a municipal town under jurisdiction of Kurortny District of the federal city of St. Petersburg, Russia. It is located on the shores of the Gulf of Finland and Sestra River some 34 km northwest of St. Petersburg...
, a part of the river was turned into a reservoir called Sestroretsky Razliv (Lake Razliv) two meters (six feet) in depth with an area of 10.6 km² (4 mi²).
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Sestra River is a
riverA river is a natural watercourse, usually freshwater, flowing toward an ocean, a lake, a sea or another river. In a few cases, a river simply flows into the ground or dries up completely before reaching another body of water...
in
Saint PetersburgSaint Petersburg is a city and a federal subject of Russia located on the Neva River at the head of the Gulf of Finland on the Baltic Sea. The city's other names were Petrograd and Leningrad...
and
Leningrad OblastLeningrad Oblast is a federal subject of Russia . It was established on August 1, 1927, although it was not until 1946 that the oblast's borders had been mostly settled in their present position. The oblast was named after the city of Leningrad. The first governor of Leningrad Oblast was Vadim...
,
RussiaRussia , officially known as both Russia and the Russian Federation , is a country in northern Eurasia . It is a semi-presidential republic, comprising 83 federal subjects...
.
The length of the river is 74 km (46 mi). The area of its
basinA drainage basin is an extent of land where water from rain or snow melt drains downhill into a body of water, such as a river, lake, reservoir, estuary, wetland, sea or ocean...
is 393 km² (152 mi²). The Sestra River flows over the
Karelian IsthmusThe Karelian Isthmus is the approximately 45–110 km wide stretch of land that connects Russia to Finland, situated between the Gulf of Finland and Lake Ladoga in northwestern Russia, to the north of the River Neva...
. It used to fall into the
Gulf of FinlandThe Gulf of Finland is the easternmost arm of the Baltic Sea that extends between Finland and Estonia all the way to Saint Petersburg in Russia, where the river Neva drains into it. Other major cities around the gulf include Helsinki and Tallinn...
until the early 18th century. After the construction of a
damA dam is a barrier that impounds water or underground streams. Dams generally serve the primary purpose of retaining water, while other structures such as floodgates or levees are used to manage or prevent water flow into specific land regions...
for the needs of the munitions factory in
SestroretskSestroretsk is a municipal town under jurisdiction of Kurortny District of the federal city of St. Petersburg, Russia. It is located on the shores of the Gulf of Finland and Sestra River some 34 km northwest of St. Petersburg...
, a part of the river was turned into a reservoir called Sestroretsky Razliv (Lake Razliv) two meters (six feet) in depth with an area of 10.6 km² (4 mi²). Since then, the Sestra River has been flowing into this reservoir. Lake Razliv is separated from the Gulf of Finland with a ridge of artificial sand dunes. Excess water is dumped into the Gulf of Finland through a
canalCanals are artificial channels for water. There are two types of canal: aqueduct canals are used for the conveyance and delivery of water, and waterway canals are navigable transportation canals used for passage of goods and people, often connected to existing lakes, rivers, or oceans.The word...
, which is 4.8 km (3 mi) long. The Sestra River served as a natural border between Russia and
SwedenSweden , officially the Kingdom of Sweden , is a Nordic country on the Scandinavian Peninsula in Northern Europe...
1323–1617 and between Russia and
FinlandFinland , officially the Republic of Finland
, is a Nordic country and democracy situated in the Fennoscandian region of northern Europe. It borders Sweden on the west, Russia on the east, and Norway on the north, while Estonia lies to its south across the Gulf of Finland...
in 1812–1940.