Measuring Lithuania for CART progress

Transcription

1 Measuring Lithuania for CART progress Svajunas Plunge Chief specialist, River basin management division, Lithuanian Environmental Protection Agency

2 Relevance to the meeting Show practice example of one country. Raise some questions in regard to MAI/CART follow up. Get guidance from the meeting.

3 CART values CART BAP N 8,935 (Atmo 507 Water 8,428) P 1,441 GUR N 0 P 26 Reference loads BAP N 44,920 P 2,635 GUR N 5,245 P 192 Values from summary report of MAI-CART

4 Calculation steps 1 1. Yearly loads t/a and flow m3/a calculated for each monitoring station. BAP LTR13 Nemunas aukščiau Rusnės, aukščiau Leitės; BAP LTR266 Minija ties Suvernais; BAP LTR20 Šyša žemiau Šilutės; BAP LTR138 Šventoji žiotyse; BAP LTR77 Akmena-Danė žiotyse; BAP LTR1 Nemunas aukščiau Druskininkų; BAP LTR43 Neris ties Buivydžiais; BAP LTR79 Bartuva žemiau Skuodo; BAP LTR82 Venta žemiau Mažeikių; GUR LTR86 Mūša žemiau Saločių; GUR LTR357 Nemunėlis ties Tabokine; BAP Unmonitored areas (770 km2) = LTR266 X coef. 0,2578.

5 Calculation steps Gaps filled by using relationships between adjacent basins. 3. Loads of LRT13, LTR266 and LRT20 are added to get Nemunas load and flow. 4. Loads for each monitoring post are normalized. 5. EMEP deposition data for BAP and GUR for LT. Gaps are filled with averages.

6 Calculation steps Belarus loads through Nemunas and Neris are added and multiplied with 0.46 for Ntot and 0.47 for Ptot (retention 0.54 and 0.53). 7. LT loads to BAP through LV calculated adding LTR79 (Bartuva) and LTR82 (Venta). Then multiplied with (to compensate for unmonitored near border) and 0.61 for Ntot and 0.42 Ptot (retention 0.39 and 0.58). 8. Matrosovka channel load is calculated dividing Matrosovka flow from Nemunas flow and multiplying coefficient with Nemunas load.

7 Calculation steps 9 9. Final LT load to BAP obtained: a. From Nemunas subtracting Belarus part; b. Adding loads from LTR77, LTR138 and unmonitored area; c. Adding Matrosovka channel load; d. Adding LT N deposition to BAP; e. Adding LT load to BAP through LV rivers.

8 Calculation steps Final LT load to GUR obtained: a. LRT86 (Musa) and LTR357 (Nemunelis) added and multiplied with 1.5 to compensate to unmonitored areas near border; b. LT load to GUR multiplied with 0.73 for Ntot and 0.68 for Ptot to account for retention (0.27 and 0.32); c. LT deposition to GUR is added.

9 Calculation step National ceiling calculation for BAP: a. CART for BAP is subtracted from LT reference loads to BAP; b. Subtracting Belarus load for reference period???. 12. National ceiling calculation for GUR: a. LT Ntot ceiling to GUR is equal to loads of reference period; b. For Ptot CART for GUR is subtracted from LT reference loads to BAP.

10 Questions to experts 1. Should Belarus load should be subtracted from reference period loads? 2. Reference period load is right after ministerial meeting (LT to BAP through Latvia is not added, etc)? 3. What part of Matrosovka should be allocated to RU? What is retention of LT loads on it? 4. Normalization for each river or grouped? 5. How to adjust for rivers on the border? 6. How to correct earlier data (loads, reference loads)? 7. Normalization from 1994?

11 Important to take into account 1. The most relevant national ceilings (not CART or MAI). 2. Reference period should be only loads from country. 3. Countries will change retention coefficients. How to avoid problems?

12 Ntot t/a N total Ntot LT National ceilings for N Ceilings for N Belarus exc

13 Ptot t/a P total Ptot LT National ceilings for P Ceilings for P Belarus exc

14 Ptot t/a Ntot t/a N & P for GUR Ntot National ceilings for N Ptot National ceilings for P

15 N mg/l What it means for N? N conc N needed N conc "good"

16 P mg/l What it means for P? P conc P conc "good" P needed P background