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The Blue Revolution: Smart Green Design for Hot ClimatesVirginie FrancoisBASF Construction Chemicals, Asia Pacific
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The Blue Revolution: Smart Green Design for Hot Climates
Virginie Francois, BASF Construction Chemicals, Asia Pacificin collaboration with: Develop Landscape Pte Ltd and Treelodge Concepts Pte Ltd, Singapore.
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• Climate Change impacts of Singapore• Importance of Rainwater management• Mosquitos and regulation• Importance of Waterproofing in Blue Roof design• BASF EEA concept • Q&A
Agenda @techtalk
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Impact of Climate ChangeWater is coming!
Source: IPCC (Intergovernmental Panel on Climate Change)
30cm2050
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Figure 1. Total Occurrences of Natural Disaster Events (1970-2014)
Blue Roof: is the New Green RoofImpact of Climate Change in Singapore
Figure 2. Occurrences of Natural Disaster Events in Asia and the Pacific by types (1970-2014)Source: unescap.org Source: unescap.org
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• The importance to learn about floods
Blue Roof: is the New Green RoofRecent Flood events in Singapore
Number of events
Flood events in Singapore
1 Bukit Timah Canal overflowed on 19 November 2009
2 Orchard Road flooding 16 June 2010
3 Orchard Road flooding 23 December 2011
4 Western parts of Singapore 5 September 2013
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Blue Roof: is the New Green RoofImpact of Climate Change in Singapore
Figure 3. Total Economic losses from Natural Disasters (1970-2014)
Source: unescap.org
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• What is a flood?The inundation of a normally dry area caused by high flow, or overflow of water in an established waterhouse, such as a river, stream, or drainage ditch; or ponding of water at or near the point where rain fell.
• What is a flash flood?A flood which follows within a few hours (usually less than 6 hours) of heavy or excessive rainfall, dam or leeve failure, or the sudden release of water impounded by an ice jam.
Flooding may last for days, weeks, or even months
Flash Flood will last for hours, less than a daymost often caused by rainfall in a short period of time
Blue Roof: is the New Green RoofWater is coming!
Source: NOAA
Source: NOAA
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Köppen Classification Scheme: climate in Singapore• Sub-type for “AF”: Tropical Rainforest Climate in Singapore• Constant high temperatures – average monthly temperatures of > 18ºC• Average monthly rainfall of > 60.0 mm
TemperatureWarmest month is June: 28.9ºCCoolest month is December: 26.7ºC
RainfallWettest month is December: 269.2 mmDriest month is July 149.9 mm
Average annual rainfall: 2270.8 mm with average of 218.0 days of liquid precipitation with the most rain occurring in the month of November 2016 with 24.0 days of rain
Blue Roof: is the New Green RoofImpact of Climate Change in Singapore
Source: weatherbase.com/singapore
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Source: Ministry of Environment and water resources
96 areas in S’pore that are flood prone or low-lying, according to PUB
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Blue Roof: is the New Green RoofWater is coming!
• Flash Floods are most commun case in Singapore
190mm
Average rainfall in one month (datas 2016)
Source: weather.gov.sg
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The Importance of Stormwater Management
• To prevent rainwater surcharge and overflow by limiting the discharge of the surface water run-off to the external drainage.
Blue Roof: is the New Green Roof
More than half of all flash flooding fatalities involve a vehicle
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Blue Roof: is the New Green Roof
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Blue Roof: build-up design
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Blue Roof: build-up design
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• The importance of the finishing: mosquito proof
Blue Roof: build up design
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• PUB Guidance: Singapore Standard SS 593: Code of Practice for Pollution Control
Blue Roof: is the New Green RoofRainwater Regulations
• Rainwater from roofs / open spaces and any unused / uncontaminated rainwater from the rainwater collection system are not allowed to be discharged into a watercourse or other collection medium in accordance to SS593: Code of Practice for Pollution Control.
• The Rainwater collection tank shall be mosquito proof in accordance to the “Guidelines on Mosquito Prevention in Domestic Rainwater Collection System for Non-Potable Uses” from NEA.gov.sg.
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• The importance of the finishing: mosquito proof
Blue Roof: build up design
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The real site conditions turning to an advantage!
Blue Roof: is the New Green Roof
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The Importance of Waterproofing
• To prevent water penetration into the building, preventing corrosion in steel building structures
Blue Roof: is the New Green Roof
After RainsWater ponding
Leakage inside building
Water accumulation
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Blue Roof: is the New Green Roof
The Importance of waterproofing system
• No rainwater contamination before collection in accordance to PUB guidance and Singapore Standard SS 593.
• Neutrality of the waterproofing membrane in direct contact with water.
BASFF BASFF
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• The importance of suitable design
Blue Roof: application
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Blue Roof: application
Video: waterproofing application
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• The importance of suitable design
Blue Roof: application
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• The importance of suitable design
Blue Roof: application
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• Detention of rainwater and stormwater: reduction peak runoff
• Reduce flood risks: on large events with retention measures
Blue Roof: Principles and Modelling
Source: Study and Business case from HARMER and RAMBOLL
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• Blue roofs attenuate peak runoff on large storm events in simple and effective way
• Cooling effect to be measured in ºC on period of time: 6months, 1year and more with results and impact on air conditioning maintenance cost in the overall building.
• Green and Blue roofs as aesthetic, refreshing and natural design on new accessible vertical living spaces in hot climates
Blue Roof: Quantified the Benefits
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Possible Contribution toSustainability Certification
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Blue Roof: LEED Sustainability Certification
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LEED Credits where Blue Roofs can contribute
Category Possible Contribution Maximum Points available
Sustainable sites Protect or restore habitatOpen spaceRainwater managementHeat island reduction
2 points1 point3 points2 points
Water efficiency Outdoor water use reduction 2 points
Energy & atmosphere Optimize energy performance 19 points
Material & resources Life cycle impact reduction, Building product disclosure and optimization
3 points6 points
Indoor environmental quality Thermal comfort 1 point
Innovation New cooling strategyNovelty water filtrationHealth aspects, recreation,..?
1 point1 point..?
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31
“Eco-Efficiency Analyses identify clear drivers for product improvement and differentiation.”!
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The Eco-Efficiency AnalysisThe tool to quantify Sustainability
The 125 Slides Report includes also:
Sensitivity and Scenario Analysis
Appendix A:Definition and References
Appendix B: Methodology
Goal and scope
Results
Conclusions
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Discover All Success Stories
www.sustainability.master-builders-solutions.basf.com
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Thank you!