Status and trends - Denmark

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1 Status and trends - Denmark
Frontpage Head of Section Martin Skriver, Danish Ministry of Environment

2 Danish river basin districts and main catchments
Four river basin districts 23 main catchments (23 river basin management plans) 385 groundwater bodies Working Group C Plenary Meeting – 20. – 21. March 2012, Brussels

3 Danish scenario Chemical pressures from nitrates controlling status assessment in in rural catchments Quantitative pressures control status assessment from municipal water works around larger cities and from irrigation in rural catchments  Larger part of groundwater bodies in poor state Working Group C Plenary Meeting – 20. – 21. March 2012, Brussels

4 Assessment of status Procedure according to CIS-guidance
Alle relevante tests gennemføres. Resultaterne af de relevante tests kombineres for at give både kvantitativ og kemisk tilstand. Den ringeste tilstand rapporteres som grundvandsforekomstens tilstand. God Ringe TEST: Indtrængning af salt vand el. andet TEST: Påvirkning af overfladevand TEST: Grundvandsafhængige terrestriske økosystemer TEST: Beskyttede drikkevandsforekomster TEST: Generel kvalitetsvurdering TEST: Vandbalance Kemisk status Kvantitativ status G R Assessment of status Procedure according to CIS-guidance Working Group C Plenary Meeting – 20. – 21. March 2012, Brussels

5 Threshold values Procedure according to CIS-guidance Postponed to 2nd
Anvendelseskriterier* Vælg kriterium for tærskelværdi Miljømæssige kriterier Overfladevand Drikkevand Industri Vanding Andre … Fastsæt en kriterieværdi (CV) for hver receptor CV4=DWS CV5 CV6 CVi… CV2=MKS*NF2/FF2 Indtrængning Sammenlign CVi med baggrundskoncentration (BL) Hvis CVi  BL så er TVi = BL Hvis CVi > BL så er BL < TVi  CVi TV4 TV5 TV6 TVi… TV2 TV1 MKS = Miljøkvalitetsstandard økotoksikologiske værdier, NF= Nedbrydningsfaktor, FF= Fortyndingsfaktor. NF og FF defineres af miljøcentret, sættes til 1 hvis ikke nærmere kendskab GWDTE = Ground Water Dependent Terrestrial Ecosystems, CV = kriterieværdi, BL = baggrundsniveau *Anvendelseskriterier er baseret på kvalitetskrav til drikkevand, vanding el. andet. Brug hver TVi for hver relevante test Rapportering Identificer den strengeste miljømæssige tærskelværdi Identificer den strengeste anvendelsesmæssige tærskelværdi Både miljømæssige og anvendelsesmæssige tærskelværdier rapporteres TV BL CV TV defineres ud fra påvirkninger og anvendelse GWDTE CV3 TV3 CV1 = BL Threshold values Procedure according to CIS-guidance Postponed to 2nd planning period - except for DW-standards Working Group C Plenary Meeting – 20. – 21. March 2012, Brussels

6 Assessment of Chemical status
Beregn gennemsnitsværdi i hvert overvågningspunkt i grundvandsforekomsten Ringe tilstand status God tilstand Foretag en relevant undersøgelse Anvend de relevante tests: indtrængning af salt vand el. andet overfladevand terrestriske økosystemer Beskyttede drikkevandsforekoms ter Generel kvalitetsvurdering Grundvandsforekomsten har ringe status for mindst 1 test Grundvandsforekomsten har god tilstand for alle tests Har mindst 1 overvågningspunkt en gennemsnitsværdi højere end det laveste kvalitetskrav eller tærskelværdi? Ja Nej Iværksæt indsatsprogrammer Overvej foranstaltninger efter grundvandsdirektivets Art. 4.5 Se afsnit for tests Se afsnit for beregning af gennemsnitsværdi Se afsnit for fastsættelse af tærskelværdier Procedure according to CIS-guidance Working Group C Plenary Meeting – 20. – 21. March 2012, Brussels

7 Status for groundwater bodies – Aarhus Bay
Forekomst Id. nr. Type Nuværende tilstand = forventet tilstand 2015 Kvantitativ tilstand Kemisk tilstand Samlet DK Terrænnær God Ringe DK Regional DK DK DK DK DK DK DK DK DK DK DK Working Group C Plenary Meeting – 20. – 21. March 2012, Brussels

8 Extension of deadlines and less stringent objectives
Has in first planning period been applied in relation to lack of knowledge of interaction groundwater/surface waters/GWDTE, resulting in: Programmes of measures in relation to 20 km. of streams, that are affected by over abstraction from municipal water supply No measures in relation to irrigation No measures in relation to chemical pressures  Establishment of lacking data and instruments for status assessment Working Group C Plenary Meeting – 20. – 21. March 2012, Brussels

9 Assessment of trends An analysis has been undertaken on the extensive national data set of groundwater trends: For the period 1988(-71) to 2007 no significant trends has been detected for nitrate – neither upwards or downwards Nitrate is one of the most often analysed substances, and also the one single substance that often results in risk for chemical status. Therefore no demand for further trend assessments in first river basin management period Locally, upwards trends can be detected, though! Working Group C Plenary Meeting – 20. – 21. March 2012, Brussels

10 Thank you for your attention!
Working Group C Plenary Meeting – 20. – 21. March 2012, Brussels