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Gulf of Finland Year 2014 opening, January 21, 2014 S.Kondratyev, A.Ershova Nutrient load estimates in the Russian part of the Gulf of Finland catchment.

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Presentation on theme: "Gulf of Finland Year 2014 opening, January 21, 2014 S.Kondratyev, A.Ershova Nutrient load estimates in the Russian part of the Gulf of Finland catchment."— Presentation transcript:

1 Gulf of Finland Year 2014 opening, January 21, 2014 S.Kondratyev, A.Ershova Nutrient load estimates in the Russian part of the Gulf of Finland catchment Sergey Kondratyev, Alexandra Ershova Institute of Limnology, RAS Russian State Hydrometeorological University St.Petersburg, Russia

2 Gulf of Finland Year 2014 opening, January 21, 2014 S.Kondratyev, A.Ershova Lake Ladoga (1) 2/3 of Narva catchment (2) Neva immediate catchment (3) Luga catchment (3) GoF immediate catchment (3) (unmonitored) St.Petersburg (WWTPs) Main components of nutrient load on GoF from Russia

3 Gulf of Finland Year 2014 opening, January 21, 2014 S.Kondratyev, A.Ershova Estimates are based on: Data for last 5 years ( ) Monitoring data: North-West Hydromet Service, Vodokanal (Luga, Narva) Longterm observations of Institute of Limnology (Ladoga) Modelling (Neva, Luga) Observations+modelling (2013, GoF imm.catch.) Work done by IL RAS, RSHU, NLBWA together with SYKE – contribution to the GoFYear2014

4 Gulf of Finland Year 2014 opening, January 21, 2014 S.Kondratyev, A.Ershova Load from Lake Ladoga with Neva River (nutrient budget of Lake Ladoga) 1 – load from catchment, 2 – internal load, 3 – atmospheric deposition, 4 – retention, 5 – outflow 1000 t P tot /year t N tot /year

5 Gulf of Finland Year 2014 opening, January 21, 2014 S.Kondratyev, A.Ershova Outflow from Lake Chudsko-Pskovskoye and Narva Reservoir with Narva River P tot и N tot discharges in Narva River (Ivangorod) 300 t Р tot /year 6500 t N tot /year

6 Gulf of Finland Year 2014 opening, January 21, 2014 S.Kondratyev, A.Ershova Neva immediate catchment ILLM – Institute of Limnology Load Model Model developed for use in conditions of limited monitoring data and its low reliability - a simple model, requiring a minimum of initial information. 790 t Р tot /year 3830 t N tot /year

7 Gulf of Finland Year 2014 opening, January 21, 2014 S.Kondratyev, A.Ershova Luga catchment Testing of ILLM model in frames of PRIMER project and BaltHazAR II project, Component 2.2 Mean load from Luga catchment P tot = 310 t/y N tot = 5240 t/y

8 Gulf of Finland Year 2014 opening, January 21, 2014 S.Kondratyev, A.Ershova St.Petersburg (WWTPs) “Vodokanal”: ~550 t P/year ~ t N/year

9 Gulf of Finland Year 2014 opening, January 21, 2014 S.Kondratyev, A.Ershova GoF immediate catchment (unmonitored) 1 - Peschanaya, 2 - Velikaya, 3 - Chulkovka, 4 - Polevaya, 5 – Drema, 6 - Matrosovka, 7 – Gorohovka, 8 – Chernaya__________ 1877 km 2 Southern Catchment – 3903 km 2 9 – Strelka, 10 – Shingarka, 11 – Karasta, 12 - Chenaya, 13 - Lebyazhya, 14 – Kovashi, 15 – Volonka, 16 – Sista, 17 – Habolovka_ 2385 km 2 Northern Catchment – 5262 km 2 Joint project in 2013: measurements on 17 tributaries of GoF

10 Gulf of Finland Year 2014 opening, January 21, 2014 S.Kondratyev, A.Ershova GoF immediate catchment (unmonitored) P tot, t/yN tot, t/y Measurements Modelling (for the rest part of the catchment) Direct load from point sources Total load on GoF

11 Gulf of Finland Year 2014 opening, January 21, 2014 S.Kondratyev, A.Ershova Load sourceP tot, t/yearN tot, t/year 1 Lake Ladoga Lake Chudskoye (Narva river) Neva river imm. catchment Luga river catchment St.Petersburg GoF imm. catchment Total BSAP recommendations on nutrient maximum allowable input in the GoF: 4860 t P/year и t N/year Note: estimated load is formed on app. 75% of the GoF catchment area Results of present assessment and BSAP recommendations ~79% ~66%

12 Gulf of Finland Year 2014 opening, January 21, 2014 S.Kondratyev, A.Ershova Possible ways to reduce nutrient load Diffuse sources: optimization of use of organic fertilizers St.Petersburg WWTPs: “Vodokanal” load reduction plan Point sources: difficult to assess (RusNIP project)

13 Gulf of Finland Year 2014 opening, January 21, 2014 S.Kondratyev, A.Ershova Perspectives and recommendations to improve our knowledge Modernization of data collection system: field works according to SYKE recommendations – every other week each season Modernization of the mathematical model, development of a determination-stochastic model of nutrient load allowing to get not only mean annual load values but also parameters of a distribution function of nutrient fluxes and loads that is very important for applied calculations and predictions Use of climatic scenarios for model predictions

14 Gulf of Finland Year 2014 opening, January 21, 2014 S.Kondratyev, A.Ershova THANK YOU


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