Green tools for urban climate adaptation GreenClimeAdapt Project, Malmö (Sweden)

1. Green tools for urban climate adaptationGreenClimeAdapt Project, Malmö (Sweden) STREAM Policy Seminar 1st of November 2011, Amsterdam Stefan Milotti, VA SYD Tony Persson, IVL

3. Malmö meets the sea

4. Canals and basins Risebergabäcken Runoff due to urbanisation Small watercourses Nature reserve Time Receiving waters

5. Riseberga Creek catchment (37 km2)

8. Main issues - erosion, flooding and angry citizens Citizensfearnewflooding

9. Riseberga creek - Sustainable urban drainage • Reduce hydraulic load to recipient • Open stormwater drainage • Slow process • Attractive blue-green space Fosie industrial area

10. Transition towards a sustainable urban drainage Sustainable urban drainage Traditional urban drainage Quality Quantity Quantity Amenity

11. Sustainable stormwater management Fosie industrial area, Malmö

12. Ecological oasis in an industrial area • Damping stormwater runoff • Create an urban woodland marsh • Recreation • Trails for horseback riding • Multifunctional use of the urban green space • Biological diversity • EU-financing 50% • Investments costs: € 620 000 • Calculated maintenance cost: € 11 000/yr Sustainable stormwater management Fosie industrial area, Malmö

13. Sustainable urban drainage in Fosie industrial area, Malmö Blue-green integration

14. Sustainable urban drainage in Fosie industrial area, Malmö Blue-green integration

15. Key factors and challenges • Integrated planning • Cooperation • Open-mindness • Landuse • Patience • Handling input from residents and stakeholders • Agreements Obstacles and objections • Muchspaceneeded • Safety • Maintenance

16. What to expect in the future – Climate scenarios for SW Sweden • Temperature: annual mean temperature will increase with 2,5 – 3,0 °C until 2050 • Winter: ~ +4 °C • Summer: ~ +2 °C • Precipitation: annual precipitation will increase with15-20 % • Winter: ~ +40 % • Summer: ~ -10 %

17. Some possible consequenses for the Riseberga Creek in a future climate • Change of hydrological regime – more discharge and increased flood frequency during winter - less discharge and decreased flood frequency during summer, but maybe an increased precipitation intensity during summer could lead to more severe flooding • Changed conditions for aquatic habitats – warmer water and (even) larger fluctuations in discharge, water velocity and water depth in 2050 than today • Decreased water quality – warmer water and higher ground water levels that might lead to more saturated surface runoff and more erosion and sediment transport

18. Modelling of flooding and the effects of possible measures Risk- and vulnerability approach: Climate/Land use scenarios  weather generator  hydrological modelling  hydraulic modelling  flooding Using the modelling results to quantify the impact of a wide range of possible measures

19. GreenClimeAdapt Project, Malmö (Sweden)STREAM Policy Seminar(extras) 1st of November 2011, Amsterdam Stefan Milotti, VA SYD Tony Persson, IVL

20. 1990 Eco-City Augustenborg 2005 20 21 19 GreenClimeAdapt 2011 Sustainable urban drainage projects in Malmö

21. Facilities for sustainable urban drainage

22. Planning for a sustainable urban drainage – values to be considered

23. Download at www.vasyd.se Sustainable urban drainage in bookshops

24. Sustainable stormwater management Biodiversity and recreation in Fosie industrial area, Malmö

25. Sustainable stormwater management Fosie industrial area, Malmö

26. Sustainable stormwater management Fosie industrial area, Malmö