![]() Between 17, 324 floods were recorded with the height above 160 cm, of which 210 were higher than 210 cm. Most floods occur in between September and December. Petersburg when water rises above 160 cm at the level gauge at the Saint Petersburg Mining Institute floods up to 210 cm are considered dangerous, up to 299 cm very dangerous and above 300 cm catastrophic. Įngineering measures were instituted in the early 18th century, and the central part of the city was flooded by only 130–150 cm. Water was high, but didn't cause much harm ". And it was amusing to see people on the roofs and trees. Yet it did not last long, less than 3 hours. In my offices, it stood 21 inches above the floor, and people traveled by boats through the city streets. The water rose much higher on 20 September 1706, which in his letter to Alexander Menshikov, Peter I described as "the west-south-west wind brought the flood undescribed before. Petersburg city occurred 3 months after its founding, on the night of 19 to 20 August 1703. Knowing about frequent floods from the locals, the Swedes laid the fortress Nyenschantz and the city of Nyen away from the delta upstream of the Neva River, at the confluence of the river Ohta to Neva. Swedish annals report that the water covered the entire area of the present St. Petersburg in 1703, the largest flood occurred in 1691. Petersburg (1824) at the intersection of the Cadet line and the Bolshoi Prospekt of Vasilievsky Island History Ī sign of the heaviest flood in St. Besides flooding as a result of storm surges, in 1903, 19 floods were caused by the melting of snow. Seiches, onsets and another factors also contribute to the floods. The water level rises because of the shallowness of Neva Bay, flatness of its bottom and the narrowing of the Gulf of Finland near the delta. Cyclones, originating in the Baltic Sea with a prevalence of west winds, induce a "slow" matched Kelvin wave to rise and move towards the delta of Neva River where it meets the natural river flow moving in the opposite direction. Petersburg are caused by several factors. Its first use to hold back the incoming Baltic water into Neva bay took place 28 November 2011 and had resulted in decrease of water rise to 1.3 MASL, that is below flood level equal to 1.6 masl, which prevented the 309th flood in the history of the city and saved some 1.3 billion roubles of possible damage. The dam is the last completed part of the Saint Petersburg Ring Road. The construction of Saint Petersburg Dam, started in 1978 and completed in 2011, is expected to protect the city from devastating floods. More than 300 floods have occurred since the city was founded in 1703. Floods are registered when the water rises above 160 cm with respect to a gauge at the Saint Petersburg Mining Institute. They are usually caused by the overflow of the delta of Neva River and surging water in the eastern part of Neva Bay but sometimes caused by melting snow. ![]() Petersburg, a major city in Russia and its former capital. Petersburg from Brockhaus and Efron Encyclopedic Dictionary of 1907.įloods in Saint Petersburg refer to a rise of water on the territory of St. ![]()
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