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The EEA “Water accounts” approach

The EEA “Water accounts” approach. Special regard to the use of nutrient balances Philippe Crouzet / BSS2. The DPSIR / PSR concept (nutrients relationships). Source: Nutrients Monograph EEA. Targets of assessment and accounting.

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The EEA “Water accounts” approach

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  1. The EEA “Water accounts” approach Special regard to the use of nutrient balances Philippe Crouzet / BSS2

  2. The DPSIR / PSR concept (nutrients relationships) Source: Nutrients Monograph EEA

  3. Targets of assessment and accounting • EEA mission is to provide... “relevant and reliable information”...: • Causal relationships must be established accurately (‘relevant’), • The information must be unbiased and comparable and comprehensive (‘reliable’). • Tools are, among other: • Statistical assessments (D / P vs. I ) • Accounting frameworks (R / D vs. S / I) • They operate on same data sets, at spatial level, and are complementary approaches

  4. Basic understanding of accounting • Basic questions • Do gains compensate losses? • Is quality carried with change? • What are the processes? • Practical questions • How to build accounts? Update on WA soon available

  5. Ecosystem accounts Natural capital accounts Water systems accounts

  6. Nutrient mass balance and accounts • Nutrients mass balance assessment is: • Sectoral important information, • Direct input to “emissions accounts”, • “pressure” component in agricultural land • Source of information to estimate “drivers” • Possible use of mass balance models to assess water / pesticide issues • The required scale / resolution is not the same however: • Regional to catchment / NUTS5-4.

  7. Prerequisites to accounts • Establish and demonstrate causal relationships, • Delineate the realm of accounts • Make comprehensive data supply: • Analytical (e.g.: all sources of emissions) • Statistical survey (e.g.: water uses) • Mixed (e.g.: reconstructing by modelling, as for water quality accounts or detailed mass balances) • Accounting framework is a guideline to establishing multi-purpose interconnected data systems

  8. Establishing causal relationships: D/S analysis • Application: stratified analysis of catchment / water composition relationships. • Ingredients for stratified nutrients assessments: • CLC + population + catchments (e.g. CCM) + livestock (from mass balance model) • Water composition statistics at stations • Application model for defining strata • Statistical methods and targets

  9. Stratification: not straitghforward

  10. Providing very demonstrative results

  11. Relation Driver / Pressure • Agricultural pressures are analysed through a combination of presence of certain types of land, livestock and population: this is Driver assessment • Mass balance (“surplus”) assessment gives comparable, despite locally different pattern, depending on the resolution of surplus modelling

  12. Maize contribution Pigs contribution Surplus calculation at catchment level -~6200 units). State 2000 Source: MEDD / Ifen 2004 • Higher complexity • Crop and livestock statistics • Practices information • Agronomical know-how • Opens to detailed causal relationships

  13. Inputs: Livestock effluents Chemical fertilisers Symbiotic fixation (N) Atmospheric deposits Outputs Export by vegetal crops Export by pastures and meadows Volatilisation (chemical fertilisers and livestock effluents) Speadeable area Dung N Stb. N ex. Manure Grazing area N Past.. Mass balances required ingredients • Mass balance is typically an accounting exercise, that can fit (with minor adjustments) into the input-output tables: • Nutrient balance (key to ecosystem accounting) • Carbon (to be developped) • Water uses and Pesticides (already tested by Ifen with the same model)

  14. Required agronomical data sources resolution Source: MEDD / Ifen (Solagro)

  15. Next step: river assessment • River quality generalized index (RQGI) as part of the water quality accounting methodology is under implementation at the EEA. Can be a stand alone production. • Breakdown of quality indexes by catchment to be related with catchment characteristics, as pressures and drivers (spatial location of pressures) to follow.

  16. Next step: adjusting mass balances to the needs • Which mass balances to carry out in parallel with Estat / JRC, etc. to provide the ad hoc emission support? Which comparability / dissemination issues? • Main issue is first collecting detailed census data (technical coefficients are more related to literature). Tries carried out by ERTC/TE 102005, outcomes not yet consolidated.

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