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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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Presentation Transcript
slide1
Faculty of Science

Monitoring the quality of stormwaterrunoff

Karin Cederkvist

DWRIP - January 2014

slide2
Faculty of Science

Stormwaterrunoff in the cities

  • Limited infiltration
  • Water runs offsealedsurfaces to the sewers – stormwaterrunoff
  • The sewerscan not cope with bothrunoff and wastewater
slide3
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
slide4
Faculty of Science

The quality of the water

Stormwater runoff is polluted

We don’t want to cause a new problem

slide5
Faculty of Science

Pilot projects – Byer i Vandbalance

Filtersoil (FS) - Brøndby and Copenhagen

Dual porosity filtration (DPF) - Aarhus and Copenhagen

slide6
Faculty of Science

Filtersoil (FS)

Brøndby and Copenhagen

slide7
Faculty of Science

Filtersoil

Pollutedrunoffwater

FILTER SOIL

Cleanwater

slide8
Faculty of Science

Dual porosity filtration (DPF)

Aarhus and Copenhagen

slide9
Faculty of Science

Dual porosity filtration (DPF)

slide10
Faculty of Science

Inspired by soil processes

  • Sorption
  • Precipitation
  • Degradation
  • Filtration
  • No externalenergy, nochemicalsadded
  • Filtersoil: The water is infiltrated

DPF: The watervolume is conserved

slide11
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

slide12
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
slide13
Faculty of Science

Our guidelines

– so far

slide14
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

slide15
Faculty of Science

Analysis – Copenhagen

slide16
Faculty of Science

Brøndby - Filtersoil

Infiltrated water collected by teflon suction tube

5

3

1

2

6

4

Strandskolevej

Lindevang

Gl. Køge Landevej

Sampling

slide17
Faculty of Science

Copenhagen - Filtersoil

Infiltrated water is collected by teflon suction tube

1

Møllebakken

Brovænget

3

2

4

Sampling

Sampling

slide18
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

slide19
Faculty of Science

Aarhus - DPF

‘Passive’ bulk sampler

samples of waterleaving the DPF

Flow proportional bulk sampler

samples of runoff

slide20

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

slide21
Enhedens navn

That’s it!