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Part C Contributions ESTONIA Freshwater Workshop EEA Copenhagen Andre Zahharov 2009

Part C Contributions ESTONIA Freshwater Workshop EEA Copenhagen Andre Zahharov 2009. Water Quality of Rivers Ptot. Water Quality of Rivers BOD7. Agri and non-agri rivers. Ecologial Status of Rivers. About 750 WB’s River 639 Lake ca 100 CW 16 30% judged by expert oppinion

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Part C Contributions ESTONIA Freshwater Workshop EEA Copenhagen Andre Zahharov 2009

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  1. Part C Contributions ESTONIAFreshwater WorkshopEEA CopenhagenAndre Zahharov2009

  2. Water Quality of Rivers Ptot

  3. Water Quality of Rivers BOD7

  4. Agri and non-agri rivers

  5. Ecologial Status of Rivers • About 750 WB’s • River 639 • Lakeca 100 • CW 16 • 30% judged by expert oppinion • No reliable trends

  6. Ecologial Status of Rivers

  7. Ecologial Status of Lakes • Impacts from agricultural intensification in 1970’s and 1980’s • Considerable improvement in 1990’s • Status of 1950’s not recovered

  8. Ptot in lake Peipus

  9. Status of Groundwater • 15 GWB’s • Good quantitative status (except 1 GWB) • NVZ of 3250 km2 • Excessive natural content of iron, manganese and ammonium

  10. NVZ

  11. NVZ

  12. Drivers and Pressures - WEI

  13. Drivers and Pressures – use and price

  14. Drivers and Pressures – treatment, load and tax on P

  15. Prognosis • Mainly expert oppinion • Several factors in consideration • Future of agriculture and livestock breeding • Economic situation • Share of WWTP in N runoff • etc

  16. Prognosis of Nitrogen in rivers

  17. Prognosis of Phosphorous in rivers

  18. Conclusion • Water quality in rivers generally good • Lakes suffering from historic pollution • Generally good GW status • Problematic NVZ • Increasing taxes

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