The Blue Revolution: Smart Green Design for Hot ClimatesVirginie FrancoisBASF Construction Chemicals, Asia Pacific

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.

• 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

Impact of Climate ChangeWater is coming!

Source: IPCC (Intergovernmental Panel on Climate Change)

30cm2050

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

• 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

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

• 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

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

Source: Ministry of Environment and water resources

96 areas in S’pore that are flood prone or low-lying, according to PUB

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

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

Blue Roof: is the New Green Roof

Blue Roof: build-up design

Blue Roof: build-up design

• The importance of the finishing: mosquito proof

Blue Roof: build up design

• 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.

• The importance of the finishing: mosquito proof

Blue Roof: build up design

The real site conditions turning to an advantage!

Blue Roof: is the New Green Roof

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

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

• The importance of suitable design

Blue Roof: application

Blue Roof: application

Video: waterproofing application

• The importance of suitable design

Blue Roof: application

• The importance of suitable design

Blue Roof: application

• 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

• 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

Possible Contribution toSustainability Certification

Blue Roof: LEED Sustainability Certification

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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“Eco-Efficiency Analyses identify clear drivers for product improvement and differentiation.”!

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

Discover All Success Stories

www.sustainability.master-builders-solutions.basf.com

Thank you!