EUROWATERNET-Emissions A European Inventory of Emissions to Water

1. EUROWATERNET-EmissionsA European Inventory of Emissions to Water (EEA - ETC Water/Eionet Workshop: Athens, 10. - 11. 4. 2002) Benoit FRIBOURG-BLANC

2. Emissions to water :… …a complex problem (Source :Eurostat)

3. Emissions to water :… …existing tools and models (1/2) emissions in the Netherlands (kg/km²/year) Benz(a)pyrenelead (Source : VROM 1999)(Source : VROM 1999)

4. Emissions to water :… …existing tools and models (2/2) emissions in the EU 15 : Agricultural N-surpluses at NUTS 2 level (kg/ha/year) <0 0-20 20-35 35-50 50-65 65-80 >80

5. EUROWATERNET-Emissions :The mandate • Develop an operational and unique framework for the assessment and inventory of emission to water, whatever the source, substance and pathway, that meets the needs of the EEA.

6. What is an Emissions Inventory ? • It’s a complete system that encompasses : • all the quantities of polluting substances • emitted from all the sources • through all the pathways

7. Emissions inventory : the example of emissions to water

8. Main Issues • For Agency’s sake: • Be compatible with WFD-WG Impress recommendations • Assess emissions as a part of pressures on Waters • Provide unbiased estimate of emissions • For all European / International bodies • Limit reporting burden and data collection to the essential (albeit relevant) • Produce as many possible outputs for a single input

9. EUROWATERNET-Emissions :Main objectives • - taking into account already existing tools and models, • - taking into account point and diffuse sources of all sizes, • - taking into account already existing reporting, • - giving the mean annual load and the maximum annual load, • - giving the apportionment of the pollution between sources • - flexible enough to present the results at many scales.

10. Purification Input/ Production Modulebox Transfer Discharge Emissions conceptual modellingModular scheme • Any emission process can be analysed as modules or stages • Each stage is characterised by 4 modalities • Stages can be nested and modalities added / transferred

11. Stage 2 Stage 3 Stage 2’ Stage 1 Each stage has the same structure, thus allowing same calculation method (provided ad hoc coefficients). Stage 1’ Emissions conceptual modellingOne possible module nesting and reporting scheme

12. Aggregated results N global emissions for France in 1997 (435 kT of N) Apportionment between sources emissions per catchment (T/km²/year) (Source : IOW and IFEN 2001)(Source : IOW and IFEN 2001)

13. Agriculture Non-point urban Non-point industrial Scattered population Domestic Active industrial sites Agriculture Non-point urban Non-point industrial Scattered population Domestic Active industrial sites Disaggregated resultsThe administrative level organic matter raw emission apportionment (BOD5 in kg/day) between “régions” (Source : IFEN 1999) between departements (Source : IFEN 1999)

14. Agriculture Non-point urban Non-point industrial Scattered population Domestic Active industrial sites Disaggregated resultsThe catchment level P global emission apportionment between catchments and sources (P in kg/day) (Source : IFEN 1999)

15. The work made • The report on Eurowaternet-emissions • Data collection guidebook • Data collection test - Compatibility with NL Emissions inventory - Compatibility with AU data system - Others?

16. Future steps forward • Develop a database of technical coefficients, tools, models… • Further cooperate with international and EU emissions working groups • Test the method in other countries : is there any voluntary country?