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Karin Cederkvist DWRIP - January 2014

Monitoring the quality of stormwater runoff. Karin Cederkvist DWRIP - January 2014. Stormwater runoff in the cities. Limited infiltration Water runs off sealed surfaces to the sewers – stormwater runoff The sewers can not cope with both runoff and waste water.

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Karin Cederkvist DWRIP - January 2014

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  1. Faculty of Science Monitoring the quality of stormwaterrunoff Karin Cederkvist DWRIP - January 2014

  2. Faculty of Science Stormwaterrunoff in the cities • Limited infiltration • Water runs offsealedsurfaces to the sewers – stormwaterrunoff • The sewerscan not cope with bothrunoff and wastewater

  3. Enhedens navn Stormwaterrunoff in the cities • We need to handle stormwater runoff locally, to • Avoid flooding of sewer systems • Close the local hydrological loop • Adapt cities to future climate changes

  4. Faculty of Science The quality of the water Stormwater runoff is polluted We don’t want to cause a new problem

  5. Faculty of Science Pilot projects – Byer i Vandbalance Filtersoil (FS) - Brøndby and Copenhagen Dual porosity filtration (DPF) - Aarhus and Copenhagen

  6. Faculty of Science Filtersoil (FS) Brøndby and Copenhagen

  7. Faculty of Science Filtersoil Pollutedrunoffwater FILTER SOIL Cleanwater

  8. Faculty of Science Dual porosity filtration (DPF) Aarhus and Copenhagen

  9. Faculty of Science Dual porosity filtration (DPF)

  10. Faculty of Science Inspired by soil processes • Sorption • Precipitation • Degradation • Filtration • No externalenergy, nochemicalsadded • Filtersoil: The water is infiltrated DPF: The watervolume is conserved

  11. Faculty of Science Municipalities Applications for local management of runoff Can wesayyes? Weneed to monitor… Guidelines! How? When? Where? What? a Weneed more data University

  12. Faculty of Science We need to monitor What goes in and what comes out? How do we make an effective monitoring within a limited budget? • Whichcompounds? (very long process) • Sampling of water – how to? • Equipment

  13. Faculty of Science Our guidelines – so far

  14. Faculty of Science Which compounds? • Basic:Minimum dataset • (6 rain events) • Extended: Including more xenobiotics • (4 rain events) • Own cocktail: Performance of the treatment units (2 times) Samples aretaken in rain events of <5-10 mm

  15. Faculty of Science Analysis – Copenhagen

  16. Faculty of Science Brøndby - Filtersoil Infiltrated water collected by teflon suction tube 5 3 1 2 6 4 Strandskolevej Lindevang Gl. Køge Landevej Sampling

  17. Faculty of Science Copenhagen - Filtersoil Infiltrated water is collected by teflon suction tube 1 Møllebakken Brovænget 3 2 4 Sampling Sampling

  18. Faculty of Science Copenhagen - DPF ISCO-sampler (P1) flow proportional samples of runoff Flow proportional bulk-sampler (P2) samples storedrunoff Pre-filter ISCO-sampler (P4) flow proportional samples of waterleaving the DPF ‘Passive’ bulk-sampler (P3) samples of waterleavingpre-filter

  19. Faculty of Science Aarhus - DPF ‘Passive’ bulk sampler samples of waterleaving the DPF Flow proportional bulk sampler samples of runoff

  20. Representative data from each site to: • Know more about the composition of stormwaterrunoff • Make sure thatwedon’tpollute the recipients • Know more about the treatmentcapacity of the facilities • Comparable data is veryimportant for future management of stormwaterrunoff Purpose of the monitoring

  21. Enhedens navn That’s it!

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