Livable Cities Thriving with Water: Artful, Technically Innovative, Integrated Herbert Dreiseitl

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1 Livable Cities Thriving with Water: Artful, Technically Innovative, Integrated Herbert Dreiseitl Director, Liveable Cities Lab Ramboll Sustainable Solutions Lab Quarterly Climate Adaptation Forum June 8, 2018

2 WHY DESIGN MATTERS; ARTFUL, TECHNICALLY INNOVATIVE, INTEGRATED STRATEGIES THAT WORK Climate Adaptation Forum, Boston Jun Herbert Dreiseitl, Liveable Cities Lab / Ramboll;

3 HOW CAN WE BRING BLUE-GREEN INTO GRAY CITIES?! Soon 2/3 of mankind will live in Cities This creates increasing pressure on Nature and the Environment Green disappears and Blue is displaced to Underground

4 We turn the city s backside to water The Current Challenges 1. Climate change 2. Growing cities with increasing areas of hard surfaces 3. Limited capacities of drainage facilities, economic limits for upgrading 4. Decreasing open space for green areas and open water

5 Partial cloudbursts are more and more common... One place gets flooded but... other neighborhoods sometimes get no drop of rain. The heat island effect causes heavy local downpours in cities Max. 119 mm

6 21 ST CENTURY WATER EXTREMES HIGH TIDE IN BOSTON, JAN IN FRONT OF OUR OFFICE!

7 21 ST CENTURY WATER EXTREMES TOO LITTLE Heatwaves, Draught North America 2017

8 Flooding, hurricans, droughts, wildfires: Damage of $306 Bio 3 nd hottest year in the US history > CITIZENS SUFFER

9 REPAIRING THE URBAN WATERBALANCE Nature Agriculture Urban Area % 50% 0-30% 5-30% 0-5% 35% 5-25% % 0 15% ABC Forum Session 2: Visioning the next step Herbert Dreiseitl

10 How to get to a Water Sensitive City INTEGRATION OF STORMWATER MANAGEMENT EXAMPLE of HAMBURG, GERMANY RISA Program STATUS: GOAL: (Grafik: Atelier Dreiseitl) END OF PIPE SOLUTION ELIMINATION OF WATER (Grafik: Atelier Dreiseitl) INTEGRATIVE SOLUTION WATER AS A TREASURE

11 RESILIENCE AND MULTIFUNCTIONAL DRY DRY WET WET

12 ABC Waters Design Guidelines Content organization I Studio Dreiseitl

13 SINGAPORE CENTRAL CATCHMENT THE ART OF INTEGRATING BLUE-GREEN INTO DENSE CITIES Herbert Dreiseitl

14 SINGAPORE CENTRAL CATCHMENT THE ART OF INTEGRATING BLUE-GREEN INTO DENSE CITIES Herbert Dreiseitl

15 SINGAPORE CENTRAL CATCHMENT THE ART OF INTEGRATING BLUE-GREEN INTO DENSE CITIES Herbert Dreiseitl

16 SINGAPORE CENTRAL CATCHMENT THE ART OF INTEGRATING BLUE-GREEN INTO DENSE CITIES ENVIRON Herbert Dreiseitl

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21 KALLANG RIVER Bishan-Ang Mo Kio Park Rain Event 4 th May 2011

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23 KALLANG RIVER

24 BLUE\GREEN\RED FROM SEGMENTED TO SEAMLESS INTEGRATION built g r e e n b l ue DRAINAGE Single probl em solution FUNCTIONALITY Separat e elements paral l e l RESILIENCY Sectoral dynamic eleme nts INTEGRATION T he water sensitive city

25 BRINGING NATURE TO DOWNTOWN SINGAPORE Image: Dreiseitl

26 BLUE-GREEN INFRASTRUCTURE TOOLKIT QUALITY CONTROL QUANTITY CONTROL Biological Absorption Evaporation Filtration Conveyance Sedimentation Detention Infiltration Retention Recycle Storage RAMBOLL LIVEABLE CITIES LAB Ramboll Foundation ReseaRch PRoject Enhancing Bl ue-gr EEn and Social PEr f ormance in high density ur Ban EnvironmEn ts

27 BGI BUILDING SCALE V E G E TAT E D R O O F Biological Absorption Conveyance E X T E R N A L G R E E N F A C A D E G R E E N B A L C ONIES IN T E R N A L G R E E N E RY Infiltration Storage Infiltration Reuse ST O R A G E A N D I N F I L T R A T I O N

28 POTSDAMER PLATZ, BERLIN

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30 Collected Rainwater and Cleansing Biotope on top of Garage and Tunnel

31 POTSDAMER PLATZ Berlin, Germany 70% 20,000 13,500 50% carbon emission reduction cubic meters of potable water saved cubic meters combined stormwater storage primary energy saved compared to air-conditioned systems Architect: Renzo Piano Building Workshop Waterdesign: Ramboll Studio Dreiseit

32 Potsdamer Platz

33 BUILDING SCALE KAMPUNG ADMIRALTY SINGAPORE MULTIFUNCTIONAL BUILDING BLOCK WOHA Architects, Singapore Ramboll Studio Dreiseitl

34 V E R T I C A L A B C W A T E R S D E S I G N I N T E G R A T I O N S A R O O F T O P L9 Rainwater downpipe from roof Vegetative filter Vegetative filter Vegetative filter L8 L7 L6 Overflow discharge overflow L3 Rain garden Freefall surface runoff to rain garden L1 Cleansing biotope *for eco-pond filtration Release to ecopond L2 Rainwater Harvesting tank for 5 days of irrigation storage Harvesting tank Surface rainwater run-off Pipe connects to retention/harvesting tank Discharge pipe Overflow discharge pipe Cleansing Biotope Pump system

35 H O L I S T I C V E R T I C A L S T O R M W A T E R M A N A G E M E N T SAVE 4.1 MILLION LITER TAP WATER PER YEAR! Annual Rainfall 7.7 ML (100%) Green Roof Vegetative Filter Rain Garden Eco-pond Vegetative filter Rain garden Cleansing biotope Rain water harvest tank 53% Collection, 4.1 ML Harvesting Tank

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37 COPENHAGEN Cloudburst Project

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39 ECONOMIC MODELS - RISK BASED MANAGEMENT SOCIO ECONOMIC AND CBA Cost of direct damages from insurance companies infrastructure owners municipal buildings etc. Loss of revenue from shops, companies, traffic Benefits from synergies

40 WHAT ARE WE ASSESSING AND HOW? BACKGROUND PURPOSE PROCESS NEXT STEPS

41 Annual cost of doing nothing THE ANNUAL COST OF DOING NOTHING VS FLOOD MANAGEMENT mio. kr. 120 mio. kr. 100 mio. kr. 80 mio. kr. 60 mio. kr. 40 mio. kr. 20 mio. kr Do Nothing Cloudburst proof

42 STRATEGY, TARGETS AND SERVICE LEVELS Service levels Flooding accepted with return period of 10 year During a 100 year extreme event (present day precipitation +40 %) water levels of up to 10 cm are accepted Strategy and targets, technical 30 % of impervious areas detached and rainwater is harvested or infiltrated Retention upstream and discharge downstream Reduced urban heat island effect by 30 % more green spaces

43 20 NØRREBROSJÆLEN

44 el Rain Basin Roof RainWater Rain Basin 7,5m ReusedRain Water 7,0m Roof Rain Water Rain Basin Surface Channel Lakefront Paths 6,5m 7,0m Filtering Biotopes Cloudburst Pipe 5,0m 6,5m 5,8m Rain Basin Lakeand RecycledWaterPipeto be filtered over surface Pump Room Filter2e3dLake WaterPipe

45 COST-BENEFIT ANALYSIS Ramboll is increasingly selling the riskbased resiliency planning approach to: 1. Build the business case (Copenhagen, NYC, Singapore, Gothenburg, etc.) 2. Prioritize options or plans (Copenhagen, Buzzard Point) 3. Define optimum safety level (Kildeskovsrenden, Buzzard Point)

46 EXAMPLE WASHINGTON D.C. Buzzard Point (US) Developing a conceptual plan for living shoreline protection along the Anacostia and building business cases for levels of protection BACKGROUND PURPOSE PROCESS NEXT STEPS

47 EXAMPLE WASHINGTON D.C. Buzzard Point (US) Comparison of costs and benefits associated with each living shoreline scenario through cashflow modelling 2100 Scenarios Baseline Strategy I Strategy II NPV ($ Million) Benefit-cost ratio BACKGROUND PURPOSE PROCESS NEXT STEPS

48 TANNER SPRINGS PARK PORTLAND Ramboll Studio Dreiseitl, Prime Greenworks, Landscape Architect Art Work, Herbert Dreiseitl

49 RAINWATER COLLECTION SYSTEM

50 RAINWATER RECIRCULATION SYSTEM AND OVERFLOW Clean water overflow into river Recirculation of rainwater to spring

51 WORKSHOP WITH PUBLIC & STAKEHOLDER INVOLVEMENT Tanner Springs Park under leadership of Herbert Dreiseitl

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53 DESIGN CREATES VALUE artful, technically innovative, integrated strategies that work Herbert Dreiseitl, Liveable Cities Lab / Ramboll herbert.dreiseitl@ramboll.com