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“Green roofs and living walls as tools of Green infrastructure against global

warming” Grey–blue-green

Manfred Köhler University of Applied Sciences [email protected]

President WGIN www.gruendach-mv.de , www.worldgreenroof.org Nature base solution, Nov. 2015, Bonn, Version: 28.09.2015

mailto:[email protected]

http://www.gruendach-mv.de/

http://www.worldgreenroof.org/

Koehler: Nature based solution 2015

The green infrastructure family grow. About 30 national organizations world wide.

Timeline of WGIC congresses: 2010 (Toronto) to 2015 (Tsingtao) here 2012: Hangzhou- China;

2013: Nantes, 2014: Sydney, 2015: Nagoya, Next: 2016: Bogota, 2017: Berlin.


1. Definition Green infrastructure 1.1 Green roofs – Extensive – Intensive, 1.2 Green facades, 1.3 Indoor Greening. 2. The urban heat island 3. Functional solution: Greenery, initiating the small water cycle. 4. Discussion: Incentives versus legal regulation, 6. Green infrastructure politics – future goals.


Resource: for this speech: -2015: Green Cities in the World (WGIN publication), and: http://glossary.eea.europa.eu/terminology/sitesearch?term=green+roofs


1.1 Green roofs, history: - Old Tar paper roofs Holzzementdächer TPG (blue) - New extensive Green roofs MEG (rot) (aus: Köhler u. Poll, 2010):

Titel der PPT – im Master einzugeben


1.1: Potential of Green roofs – urban biodiversity Example Green roof Center – Neubrandenburg, Germany



1.1.: Roof gardens – Additional urban amenity space in Cities.


Green roofs: from old (fire protection, insulation) to new functions: Examples from Berlin.



1.2: Green facades: example: One Central. by Jean Nouvel, and Patrick Blanc see: the plant species list inside.


1.2: Construction details: Living walls: Climber Gabion-

type Small Boxes /

Horizontal Wall modular

systems Geotextile, Geovliese


Biodiversity of Green roof and living walls , WGIC 2015 1.3: Potential of Indoor greening – Example in Germany.


1.3: Potential of Indoor greening! Example: Pasona in Tokio – Japan


1.3: Potential of Indoor greening: Example Germany: more than 500 species are possible. FLL-issue 2011, update for 2016 www.fll.de

http://www.fll.de/



2. The urban heat island: The situation: (Functional solution by this against global warming: and the small water cycle.)

Urban heat island – effects: - Buildings with high heat storage capacity

(consequence: hot nights in summer), - Lack of Vegetation (missing shade and

evaporation cooling, - Rain: Too quick run off.



2.1 The urban heat island: Solutions: Inition of the local water cycle as solution: - Saving open and greened spaces. - Retaining and evaporating precipitation - Intallation Vegetation where it is possible. Quantification:

- CO2-fixation (in Konzentration) - Additional insulation (u-Value) - Cooling load (Evaporation in kJoule/day).


2.1.1 Solution: Local water retention: Building greenery and evaporation: Energetic process (black roof versus green roof) Blue evaporation by plants


2.1.2 Solution: Local water retention: Building greenery More: http://www.kuras-projekt.de/

http://www.kuras-projekt.de/


2.1.3 Solution: Local water retention: in parks, where ever it is possible. Singapore and Bishan Park project (Atelier Dreisaitl). Kuras partner.


2.1.4 Solution: Green-roof evaporation. Non- and irrigated solutions. Data collection by lysimeter technology.


2.1.4 Solution details: Calculation of the active energy use by vegetation. Green roof 2.0: Evapotranspiration up to 5 l/m² and day.

Non-irrigated ……. rain water irrigated green roof.


2.2 The Green roof solution 2.0: The rain water irrigated green roof. - Summer evaporation 3-5 liter / m².

- (measured Lysimeter, simulated: Envimet). - Higher Biodiversity (Plant lists from several

projects). - Higher visual quality for citizens (Questionaire

to involve citizens).

Biodiversity roofs in Brno/Czech


4. Discussion: Incentives versus legal regulation - Money saving by green infrastructure, - Make compact Cities more liveable – social

interaction e.g. on community gardens. - Bringing back biodiversity to town.


4.1 Case study Germany: Incentives versus legal regulation - What performs better? Guidelines are the key



4.1 Example Berlin: obligatory building codes, and demonstration projects? 13 case studies are available online for download: http://www.stadtentwicklung.berlin.de/bauen/oekologisches_bauen/de/ausstellung/index.shtml

http://www.stadtentwicklung.berlin.de/bauen/oekologisches_bauen/de/ausstellung/index.shtml




1. City level – Case studies from Germany:

FBB: survey: www.FBB.de about 1/3 of all German Cites have related regulation. Examples: Berlin: Case studies – information politics, building codes, Hamburg: New incentive programme 2015

http://www.fbb.de/


5. Green roofs – Green infrastructure politics Best current situations: around 1 sqmeter Green roof/ inhabitant (example Berlin) = 8% Green roof space today. Aim in the EU by EFB: (http://www.efb-greenroof.eu/index_de.html ) 2030: 5sqmeter/ inhabitant.

http://www.efb-greenroof.eu/index_de.html




Let us start … Hamburg/Germany 3,000,0000 € in 2015

manfred köhler - bfn · manfred köhler . university of ... titel der ppt – im master einzugeben...

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