Åttonde Nordiska Dricksvattenkonferensen - Svenskt Vatten
Åttonde Nordiska Dricksvattenkonferensen - Svenskt Vatten
Åttonde Nordiska Dricksvattenkonferensen - Svenskt Vatten
Create successful ePaper yourself
Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.
Risikostyring i vandforsyningen<br />
Corfitzen C B*, Arnbjerg-Nielsen K*, Andersen H S**, Jørgensen C**, Jacobsen P***,<br />
Mollerup F****, Lind S*****, Heidemann G ****** , Jensen R*******, Albrechtsen H-J*<br />
*DTU Miljø, Danmarks Tekniske Universitet, Miljøvej, bygning 113, DK-2800 Kgs. Lyngby,<br />
cbco@env.dtu.dk; karn@env.dtu.dk; hana@env.dtu.dk<br />
**DHI, Agern Allé 5, DK-2970 Hørsholm, hsa@dhigroup.com; clj@dhigroup.com<br />
***Århus Vand A/S, Bautavej 1, DK-8210 Århus V, pja@aarhusvand.dk<br />
****VandCenter Syd A/S, Vandværksvej 7, DK-5000 Odense C, fm@vandcenter.dk<br />
*****Københavns Energi A/S, Ørestads Boulevard 35, DK-2300 København S, soli@ke.dk<br />
******Naturstyrelsen, Haraldsgade 53, DK-2100 København Ø, guhei@nst.dk<br />
*******Odense Kommune, Flakhaven 2, DK-5000 Odense C, rij@odense.dk<br />
Abstract. Drinking water in Denmark is distributed with only few or no hygienic barriers between<br />
catchment and consumer, and it is therefore essential to monitor the drinking water quality. Traditionally,<br />
drinking water monitoring has been performed as a control of the delivered water quality rather than as a<br />
risk management, allowing to react timely on quality changes to prevent distribution of a deteriorated water<br />
quality. ‘From risk monitoring to risk management – risk assessment in water supply’ is a 3-year (2011-<br />
2013) innovation project under the strategic partnership ‘Water in Urban Areas’ (www.vandibyer.dk) carried<br />
out by the knowledge institutions DTU Environment, DHI, the water utilities Copenhagen Energy, Aarhus<br />
Water, VCS Denmark and the public authorities Odense municipality and the Danish Nature Agency. The<br />
purpose of the project is to develop and implement risk management as a part of the climate adaptation<br />
measures in the water supply. The risk management will be based on the development of a new and<br />
improved monitoring strategy from catchment to consumer - taking into consideration the possibilities and<br />
limitations of analytical methods and sensors - and the development and implementation of advanced<br />
quantitative risk analysis and management systems. The project work includes: a) Identification of focus<br />
areas based on experiences gathered from contamination cases in the involved water supplies; b)<br />
Identification of additional demand for management systems for monitoring based on experiences from the<br />
processes of implementing Water Safety Plans; c) Development of a new monitoring strategy; d)<br />
Development of quantitative risk assessment in water supply; e) Development of strategies for<br />
implementing extra hygienic barriers e.g. UV; f) Development of new software to cover identified demands<br />
for monitoring and management; g) Implementing and evaluating developed tools in demonstration<br />
projects, hereby ensuring further dissemination. The first part of the project has been a knowledge<br />
gathering based on the water utilities experiences from implementation of Water Safety Plans and from<br />
contamination cases. The knowledge gathering will be used to define monitoring strategies for the three<br />
scenarios a) the normal situation; b) a contamination situation; c) source tracking situation.<br />
Baggrund<br />
Vandforsyningen i Danmark er stærkt decentraliseret med over 2500 vandforsyninger og en årlig<br />
drikkevandsproduktion i størrelsesordenen 400 mio m 3 baseret udelukkende på grundvand. Efter en<br />
simpel behandling, der oftest kun består af iltning og sandfiltrering, distribueres drikkevandet uden<br />
desinfektionsresidual, og der er derfor ingen eller få hygiejniske barrierer mellem boring og forbruger.<br />
Monitering af drikkevandskvalitet bliver således essentiel. Historisk set bygger kvalitetssikring af<br />
vandforsyningsprocesser i langt højere grad på kontrol - det vil sige en måling af, om det leverede vand<br />
var i orden - end på styring, hvor der kan ageres ved ændring af vandkvaliteten så rettidigt, at distribution<br />
af forringet vandkvalitet hindres. Især på det mikrobiologiske område, hvor en vandanalyse kan tage 1-3<br />
døgn, er der behov for at kunne være mere på forkant.<br />
I forbindelse med de seneste års kraftige nedbørshændelser opstod der mikrobiologiske forureninger<br />
med efterfølgende kogeanbefaling i fx byerne Køge, Århus og København. Der er et udtalt behov for en<br />
forbedret overvågning af vandkvalitet i højdebeholdere og forsyningsnet, så risici ved øget<br />
nedbørsintensitet og efterfølgende oversvømmelse som konsekvens af klimaændring kan håndteres.<br />
42 Session 2: Säker dricksvattenförsörjning
Change language