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

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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

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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

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Aim

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Object and Scope of the work

  • Object :

Neva river (from Lake Ladoga till mouth)

  • 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)

Neva river

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Executors

Sampling + Flow measurement

FSI “North-West Department of Hydrometeorology and Environmental Monitoring” Chemical analysis Laboratory of FSI “North-West Department of Hydrometeorology and Environmental Monitoring” Participated in the PLC-6 intercalibration Russian Consultant Participated in the 1st sampling round POYRY Finland Oy

AND

Supplementary EU Consultant

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1st sampling round - Programme

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1st sampling round - Programme

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

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

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Load generating

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Tributaries influence

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Comparison of the chemical analysis results (POYRY&Hydromet)

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Main results of the 1st 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)

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From 1st to 2nd sampling round

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2nd sampling round

2 26 25

19 20 21 22

28 29 30 31

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34.1% 40.0%

31% 32% 33% 34% 35% 36% 37% 38% 39% 40% 41%

Section 2A Section 1A 1st round Ptot load formation

2nd round Ptot load dynamics compared to 1st round

Neva river head Neva mouth Neva river SPb/LO border

3.5% 43.5%

0% 5% 10% 15% 20% 25% 30% 35% 40% 45% 50%

Section 2 Section 1

2nd round Ptot load formation A A

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19.4%

  • 15.1%
  • 20%
  • 15%
  • 10%
  • 5%

0% 5% 10% 15% 20% 25%

Section 2 Section 1 1st round Ntot load formation

A

  • 28.7%

16.1%

  • 35%
  • 30%
  • 25%
  • 20%
  • 15%
  • 10%
  • 5%

0% 5% 10% 15% 20%

Section 2 Section 1

2nd round Ntot load formation

A

2nd round Ntot load dynamics compared to 1st round

Neva mouth Neva river SPb/LO border Neva river head

A A

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Results – 1st and 2nd rounds

1st round 2nd round Average Ntot load t/day Ptot load t/day Ntot load t/day Ptot load t/day Ntot load t/day Ptot load 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

10 20 30 40 50 60 Diffence (Mouth - Head) Tributaries Undefined load t/day

Ntot load, t/day

1st round Ntot load 2nd round Ntot load 1 2 3 4 5 6 7 Diffence (Mouth

  • Head)

Tributaries Undefined load t/day

Ptot load, t/day

1st round Ptot load 2nd round Ptot load

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More detailed assessment- more points in Neva river

1

3,45

19,20, 21,22

6,32

2 0,05 10 0,22 13 0,04 14 0,02 15 0,01 8 0,22 9

  • 0,003

16 0,07 17 0,03 24 0,08 25 0,08 26 0,001 27

6,1

28

5

29

7,16

30

6

31

6,9 Sub-section 6 Sub-sec. 1 Sub-sec.2 Sub-sec. 3

Sub-sec.4

Sub-section 5

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(1.50) (1.00) (0.50)

  • 0.50

1.00 1.50 2.00 2.50

№ 6. № 5. № 4. № 3. № 2. № 1.

Ptot load formation dynamics along Neva river estrarium Load formation on the sub-section Tributaries input

Pathways of load formation on the sub-sections

(50) (40) (30) (20) (10)

  • 10

20 30 40

№ 6. № 5. № 4. № 3. № 2. № 1.

Ntot load formation dynamics along Neva river estratium

Load formation on the sub-section Tributaries input Neva river head Neva river SPb/LO border Neva mouth

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Main conclusions – 2nd 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.

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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.

?

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Chemical analysis uncertainty for Ptot, t/day

  • 1.5
  • 1.0
  • 0.5
  • 0.5

1.0 1.5 2.0 2.5 № 6. № 5. № 4. № 3. № 2. № 1. t/day № of the Section Tributaries Ptot load

  • n the Section

Load formated on the Section

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Chemical analysis uncertainty for Ntot, t/day

(30) (20) (10)

  • 10

20 30 № 6. № 5. № 4. № 3. № 2. № 1. t/day № of the Section Tributaries Ntot load on the Section Total load formated on the Section

Water uptake for water supply – around 2 t/day

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Conclusions 2nd sampling round:

  • Ptot input is present on sections 1 and 2;
  • Ntot input is present on Section 4.
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3rd sampling round programme

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  • 10
  • 5

5 10 15 20 № 6 № 5 № 4 № 3 № 2 № 1

t/day

Ptot load formation along Neva river

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  • 50
  • 40
  • 30
  • 20
  • 10

10 20 30 40 50

№ 6 № 5 № 4 № 3 № 2 № 1

t/day

Ntot load formation along Neva river

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0.05 0.1 0.15 0.2 0.25 0.3 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 downstream the Chernaya river mouth 29-Neva river 1,7 km downstream Dubrovka river 30-Neva river 8,4 km downstream Mga river 27-Neva river at the border of SPb/LO 31-Neva river 0,5 km downstream Slavyanka river mg/l

Ptot concentration in Neva river by verticals

0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 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 downstream the Chernaya river mouth 29-Neva river 1,7 km downstream Dubrovka river 30-Neva river 8,4 km downstream Mga river 27-Neva river at the border of SPb/LO 31-Neva river 0,5 km downstream Slavyanka river mg/l

Ntot concentartions in Neva river by verticals

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1 2 3 4 5 6

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Future works:

  • 4th sampling round – April 2014;
  • Final report
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Kaliningrad Oblast Case prepared by Mr. D. Domnin (BIEH)

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3rd sampling round

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Thank you for attention!