Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa, 2025, V. 22, No. 6, pp. 387-391
Flooding on July 4, 2025, in Saint Petersburg
A.V. Kiselev
1 , R.R. Mikhailenko
2 , A.A. Tronin
1 1 Saint Petersburg Scientific Research Center for Ecological Safety RAS, Saint Petersburg, Russia
2 Directorate of Flood Prevention Facility Complex of Saint Petersburg, Saint Petersburg, Russia
Accepted: 17.10.2025
DOI: 10.21046/2070-7401-2025-22-6-387-391
On July 4, 2025, a sea surge flood was prevented in the city of Saint Petersburg. Only two July floods have been recorded in the entire history of observations. Potential dangerous consequences of this event were prevented thanks to the use of the Saint Petersburg Flood Prevention Facility Complex (FPFC). Satellite images taken by the Sentinel-2B spacecraft over the Gulf of Finland and the Neva Bay feature the closed position of the FPFC gates, and also provide an opportunity to assess a significant increase in water turbidity in the Neva Bay. The increase in turbidity may be caused both by the prevailing stormy weather conditions and, possibly, by the consequences of long-term activities on artificial alluviation of new territories in the Gulf of Finland in the western part of the city. Possible negative environmental consequences of these works have already been noted earlier, however, the construction of new territories in the waters of the Gulf of Finland is still ongoing.
Keywords: flood, satellite, turbidity, alluviation, Flood Prevention Facility Complex
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