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Violeta Seva (Makati City) and Debra Lam (Arup)

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METRO MANILA

• 16 cities and one municipality• Political, social, and economic

center of the Philippines• Bounded by several major water

and river systems• Manila Bay in the East• Laguna de Bay in the West

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Climate Change Predictions for Metro Manila2050 Scenario Sea Level Rise (cm) Increase Rate of

Rainfall (%)Storm Surge Height in Manila Bay (m)

Status Quo Climate 0 0 0.91

Less Anticipated Change (Sustainable

Growth)

19 9.4 0.91

Large Anticipated Change (High

Economic Growth)

29 14.4 1.00

Source: Climate Risks and Adaptation in Asia Coastal Megacities, WB/ADB/JICA, Sept 2010

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• 1 in 100 year rainfall but 1 in 500 year flood.

Typhoon Ondoy,26 September 2009

Source: Flood Reduction Measures in Metro Manila, MMDA

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Signed by the President in

November 2011

Approved on April 28, 2010

Office of the President of the

Philippines

Republic Act 9729 in 2009

Climate Change Act of 2009

Climate Change Commission

National Framework Strategy on Climate

Change

National Climate Change Action Plan

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Metro Manila’s Flood Control Projects

Na

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da

n

Ch

an

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Laguna Lake

Ma

nil

a B

ay

San Juan River

Ma

ng

ah

an

F

loo

dw

ay

Pasig River Marikina River

Rosario Weir

Nangka River

NHCSMarikina

Dam

Laguna Lakeshore Ring

Road Dike

Metro Manila Flood By-Pass

Other Drainage Improvement Works

Pasig-Marikina River Improvement ProjectMGCS

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Climate Change Impacts

Longer Dry Seasons

Salination of WaterSources

Urban Flooding

Water Scarcity

Impact on Manila Water Resources

Combat Salination

Improve Basin Management

Improve Yield

Water Resilience Strategies

Implement Demand Management

Higher Sea Levels

More Extreme Summer Rainfall

Water Resilience Strategies

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Flood Resilience Strategies

More Extreme Summer Rainfall

Climate Change Impacts

Salination of Water Sources

Urban Flooding

Water Scarcity

Impact on Water Infrastructure

Increase Rainfall Storage

Mainstream WSUD into Urban Planning

Improve Drainage Conveyance Efficiency

Flood Resilience Strategies

Longer Dry Seasons

Higher Sea Levels

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Case Study Locations

Ho Chi Minh CityManila

South Australia

Ontario JordanSouthampton

Shanghai

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Any Questions?

Thank you