Nutrient Load from the Russian Territory on the Gulf of Finland
https://doi.org/10.7868/S2073667319020096
Abstract
Setting nutrient load reduction targets for the Baltic Sea, and monitoring whether these targets have been met, calls for reliable information on the nutrient load from all the surrounding countries. The objective of this study was to estimate the loading of Ntot and Ptot from the Russian territory on the Gulf of Finland, one of the most eutrophied subbasins of the Baltic Sea. The nutrient load assessment was based on available monitoring data and statistics, mathematical modelling and additional sampling in the previously unmonitored areas. New data on nutrient loads at the small unmonitored rivers of the Gulf of Finland immediate catchment are presented and discussed. The data compilation showed that in order to fulfil the nutrient abatement recommendations of the HELCOM Baltic Sea Action Plan for the Gulf of Finland, a further reduction of 2084 t of N/a and 202 t of P/a from Russia is needed. Suggestions to improve Russian load monitoring system are given.
Keywords
Gulf of Finland,
monitoring,
unmonitored catchment,
total nitrogen,
total phosphorus,
nutrient load,
model
Supporting agencies: The research was partly funded by the Neva-Ladoga Water Administration in frames of the project “The Gulf of Finland Year 2014” and in the study № 0154-2019-0001 of the State research plan for the Institute of Limnology RAS.
About the Authors
S. A. Kondratyev
Institute of Limnology, Russian Academy of Sciences
Russian Federation
Russian Federation
St.-Petersburg
A. A. Ershova
Russian State Hydrometeorological University
Russian Federation
Russian Federation
St.-Petersburg
P. Ekholm
Finnish Environment Institute
Finland
Finland
Helsinki
N. V. Victorova
Russian State Hydrometeorological University
Russian Federation
Russian Federation
St.-Petersburg
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For citations:
Kondratyev S.A., Ershova A.A., Ekholm P., Victorova N.V. Nutrient Load from the Russian Territory on the Gulf of Finland. Fundamental and Applied Hydrophysics. 2019;12(2):77-87. https://doi.org/10.7868/S2073667319020096
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