Climate Adaptation: Existing Infrastructure and Retrofitting the City

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Primrose Hodges
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1 Climate Adaptation: Existing Infrastructure and Retrofitting the City Conference: Nordic Solutions for Robust Societies 25. October 2018 By Uffe Gangelhof, Project Director VandCenter Syd

2 The City of Odense

3 The City Development Plans

4 City Development Plans in Action

5 .. And Large Buildings.. Data Center m2 New hospital m2

6 Drivers for Change and Innovation Urbanisation Climate Change Sustainability Environmental regulation Digitalisation Smart City Ressource Scarity Water Sector Regulation

Challenges Acknowledge - Solutions Challenges Climate change increased precipitation in winter + cloud burst in summer Rising ground water (multiple reasons) and sea level Increase in discharge in

economy environmental damage areal competition We now acknowledge, that Pipe systems are expensive and not sustainable rainwater must be dealt with locally Increased discharge = huge retention

7 Challenges Acknowledge - Solutions Challenges Climate change increased precipitation in winter + cloud burst in summer Rising ground water (multiple reasons) and sea level Increase in discharge in rivers increase in water level Traditional pipe system rapid transport to lowest lying area Recipient protection strict regulation on hydraulics and water quality huge basins Flooding damages public economy environmental damage areal competition We now acknowledge, that Pipe systems are expensive and not sustainable rainwater must be dealt with locally Increased discharge = huge retention basins, dig up the city etc. Climate uncertainties in expected life time? We need flexible solutions SUDS economical sound, sustainable, additional value etc. Public areas and lack of space multifunctional use Partly separation of rainwater by SUDS combined with relining of existing pipes can be a good overall solution. This change demands: Political awareness and visions State of the art city development masterplanning and water scaping Space in public areas roads, parks, streams, squares, schools etc. Municipal co-creation and joined economy in projects Local citizen involvement Legislation and finance

8 Example KlimaKlar Skibhus

9 Traditional vs. Alternative

12 Blue-Green Obstacle Course - Analyse traffic needs - Lorries, long vehicles etc. - Can vehicle pass each other? - Curb heights - Curve radius - Hight of plants visibility - Bike safety - Street lights shadows etc... It is lovely with a green street. But please do not plant trees in front of MY house

Odense Municipality EU project on SUDS Reduce energy consumption to pump and clean rain water by introducing SUDS In coherence with Odense City Strategies Accelerate implementation of Climate

13 Odense Municipality EU project on SUDS Reduce energy consumption to pump and clean rain water by introducing SUDS In coherence with Odense City Strategies Accelerate implementation of Climate Adaptation Plan New co-creation processes is to be created, tested and implemented 5 main topics and 37 working groups - development and test of new SMART tools - Analysis and data to facilitate co-creation - New methods and technology development and test - Communication and stakeholder involvement - development of virtual 3D tool Total budget appr. 18 mio DKKR. Superior purpose to change the city planning process from external corporation to integrated co-creation including water-scaping, SUDS and synergies with other investments

14 What is the potential? Sustainable solutions with added value Realized construction savings of 20-40% Slightly increased maintenance costs (green) Reduced costs for private houseowners Co-creation and synergies potential municipality savings Blue-green value added to the local environment Access to blue-green areas = attractive quality Rising house prices (initially 2-10%) New identity for the existing neighbourhood

15 Messages and Conclusion Climate Change affects the entire water circle the solutions must include the water cycle Climate Change demands solutions with more capacity, flexibility and resilience Unique potential in using these investments to reshape/redesign/retrofit the existing city LCA study proves sustainable advantages by applying SUDS in stead of traditional piping Our experience: It makes sense to introduce SUDS with added local value SUDS can advantageously supplement existing sewers detaining and delaying runoff including cleaning the polluted surface water SUDS is to be retrofitted into roads, parks, public spaces, urban nature, institutions etc. Planning of SUDS require political visions, multidisciplinary team work, stakeholder involvement and time to fur fill the creative process Danish legislation and funding is a challenge limiting the most cost-effective solutions Change in mind set and operation we must succeed in working multidisciplinary

16 Questions?

NBS solution managing run-off in cities Bruno Tisserand EurEau President

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