transboundary rivers, and the evaluation of their sources Natalia - PowerPoint PPT Presentation

Assessment and quantification of nutrient loads to the Baltic Sea from Leningrad Oblast and transboundary rivers, and the evaluation of their sources Natalia Oblomkova SPb PO “ Ecology&business ” Expert for Monitoring segment BASE Project Russian contact person in HELCOM LOAD Group PLC-5.5 Project and PLC-6 Project

Aim

Object and Scope of the work • Object : Neva river (from Lake Ladoga till mouth) Neva river • Scope of the work: • 4 rounds of the sampling works in Neva river catchment (Flow, Ptot and Ntot content) • desk studies on quantification of Russian transboundary loads (Narva, Neman)

Executors Sampling Chemical analysis + Flow measurement Laboratory of FSI “North -West Russian Department of Consultant Hydrometeorology and Environmental Monitoring” FSI “North -West Department of Participated in the PLC-6 Hydrometeorology and intercalibration Environmental Monitoring” AND Supplementary POYRY Finland Oy EU Consultant Participated in the 1 st sampling round

1 st sampling round - Programme

1 st sampling round - Programme

Results-Neva river- Ptot load (t/day)

Results-Neva river- Ntot load (t/day)

Load generating

Tributaries influence

Comparison of the chemical analysis results (POYRY&Hydromet)

Main results of the 1 st sampling round • Nutrient load to the Neva river from tributaries: Dubrovka, Chernaya rechka (LO), watercourse from Sinyavino, Grunevka, Chernaya (Krasnaya Zarya settlement), Utka, Murzinka is insignificant • All along the Neva river there are significant undefined load (direct point and diffuse sources of nutrient load)

From 1 st to 2 nd sampling round

2nd sampling round 22 2 31 29 30 21 28 20 19 26 25

2 nd round Ptot load dynamics compared to 1 st round 1st round Ptot load formation 40.0% 41% 40% 39% 38% 37% 36% 34.1% 35% 34% 33% 32% 31% Section 2A Section 1A Neva Neva river SPb/LO Neva river mouth border head 50% 43.5% 45% 2nd round Ptot load formation 40% 35% 30% 25% 20% 15% 10% 3.5% 5% 0% Section 2 A Section 1 A

2 nd round Ntot load dynamics compared to 1 st round 25% 19.4% 20% 15% 1st round Ntot load formation 10% 5% 0% -5% Section 2 Section 1 A A -10% -15% -15.1% -20% Neva Neva river SPb/LO Neva river mouth border head 20% 16.1% 2nd round Ntot load formation 15% 10% 5% 0% -5% A Section 2 Section 1 A -10% -15% -20% -25% -30% -28.7% -35%

Results – 1 st and 2 nd rounds 1st round 2nd round Average Ntot load Ptot load Ntot load Ptot load Ntot load Ptot load t/day t/day t/day t/day t/day t/day Neva river head 198,6 2,9 137,9 3,45 0,5 km downstream Slavyanka mouth 254 9,1 172,4 6,9 Mouth 255 6,9 156,9 7,7 Diffence (Mouth - Head) 55,4 6,2 2,7 3,45 Tributaries 21,08 2,7 7,9 0,62 Undefined load 33,6 3,5 26,6 2,8 30,1 3,15 60 7 Ntot load, t/day Ptot load, t/day 6 50 5 40 4 t/day t/day 30 1st round Ntot load 1st round Ptot load 3 2nd round Ntot load 2nd round Ptot load 20 2 10 1 0 0 Diffence Tributaries Undefined load Diffence (Mouth Tributaries Undefined load (Mouth - Head) - Head)

More detailed assessment- more points in Neva river 24 0,08 9 8 2 -0,003 0,22 0,05 19,20, 30 29 28 1 31 27 21,22 6 7,16 5 3,45 6,9 6,1 6,32 17 16 0,03 0,07 15 14 13 10 0,01 0,02 0,04 0,22 26 25 0,001 0,08 Sub-sec. 3 Sub-sec.2 Sub-sec.4 Sub-sec. 1 Sub-section 5 Sub-section 6

Pathways of load formation on the sub-sections Ptot load formation dynamics along Neva river estrarium 2.50 Load formation on the sub-section Tributaries input 2.00 1.50 1.00 0.50 - № 6. № 5. № 4. № 3. № 2. № 1. (0.50) (1.00) (1.50) Neva Neva river Neva river SPb/LO mouth head border Ntot load formation dynamics along Neva river estratium 40 Load formation on the sub-section Tributaries input 30 20 10 - (10) № 6. № 5. № 4. № 3. № 2. № 1. (20) (30) (40) (50)

Main conclusions – 2 nd round, Neva river • There are significant decrease in load on Section 6 (Neva river within SPb borders) • Tributaries input are less then 30%, there are significant undefined direct load to Neva river.

Decrease in the Section before mouth Reason – decrease in river flow in around 500 m3/sec, because: • the Srednya Nevka river has not been included in program (Flow about 250 m3/sec), • the flow measurements has been carried out in different dates, • partly flow has been decreasing due to water intake. After corrections in flow values (using statically approved coefficients to calculate flow in branches and loses in small rivers in canals of St.Petersburg) the load decrease on the section are: 0,4 t/day for Ptot and 20, 53 t/day for Ntot. ?

Chemical analysis uncertainty for Ptot, t/day 2.5 2.0 1.5 Tributaries Ptot load on the Section 1.0 t/day 0.5 - № 6. № 5. № 4. № 3. № 2. № 1. -0.5 Load formated on the Section -1.0 -1.5 № of the Section

Chemical analysis uncertainty for Ntot, t/day 30 20 Tributaries Ntot load on the Section 10 t/day - № 6. № 5. № 4. № 3. № 2. № 1. (10) Total load formated on the Section (20) (30) № of the Section Water uptake for water supply – around 2 t/day

Conclusions 2 nd sampling round: • Ptot input is present on sections 1 and 2; • Ntot input is present on Section 4.

3 rd sampling round programme

20 Ptot load formation along Neva river 15 10 t/day 5 0 № 6 № 5 № 4 № 3 № 2 № 1 -5 -10

50 Ntot load formation along Neva river 40 30 20 10 t/day 0 № 6 № 5 № 4 № 3 № 2 № 1 -10 -20 -30 -40 -50

Ptot concentration in Neva river by verticals 0.3 0.25 0.2 mg/l 0.15 0.1 0.05 0 0.1 0.5 0.9 0.1 0.5 0.9 0.1 0.5 0.9 0.1 0.5 0.9 0.1 0.5 0.9 0.1 0.5 0.9 1 -Neva river head 28-Neva river 1,2 km 29-Neva river 1,7 km 30-Neva river 8,4 km 27-Neva river at the 31-Neva river 0,5 km downstream the downstream Dubrovka downstream Mga river border of SPb/LO downstream Slavyanka Chernaya river mouth river river 2 Ntot concentartions in Neva river by verticals 1.8 1.6 1.4 1.2 mg/l 1 0.8 0.6 0.4 0.2 0 0.1 0.5 0.9 0.1 0.5 0.9 0.1 0.5 0.9 0.1 0.5 0.9 0.1 0.5 0.9 0.1 0.5 0.9 1 -Neva river head 28-Neva river 1,2 km 29-Neva river 1,7 km 30-Neva river 8,4 km 27-Neva river at the 31-Neva river 0,5 km downstream the downstream Dubrovka downstream Mga river border of SPb/LO downstream Slavyanka Chernaya river mouth river river

1 6 2 5 3 4

Future works: • 4 th sampling round – April 2014; • Final report

Kaliningrad Oblast Case prepared by Mr. D. Domnin (BIEH)

3 rd sampling round

Thank you for attention!