Built to protect: SM Prime’s flood mitigation strategy

SM Prime Holdings (SM Prime), a pioneer in sustainability initiatives in the Philippines, has long been committed to environmental stewardship and building resilient structures. From its early adoption of water recycling and innovative energy management programs to operationalizing renewable energy and waste management, SM Prime has consistently prioritized sustainability. This commitment was further underscored by the company’s active participation in the recent Asia Pacific Ministerial Conference on Disaster Risk Reduction, hosted by the Department of Environment and Natural Resources and the Office of Civil Defense. At the conference, Hans Sy, Chairman of the Executive Committee, emphasized the critical role of resilience in urban populations and how innovation and multi-sectoral collaboration are essential for the country’s sustainable development.

The Philippines is highly vulnerable to natural hazards, especially tropical cyclones and typhoons, making disaster risk management (DRM) and resilient infrastructure crucial. SM Prime employs a hydrological survey approach in building locations to determine flood susceptibility. 

SM City Marikina prioritizes safety with flood mitigation measures, ensuring a secure and comfortable environment for the community.

SM City Marikina, elevated on 246 concrete stilts, allows floodwaters to flow beneath, keeping occupants safe during severe weather events.

A strong example of such resilience lies in SM City Marikina, whose unique structure was lauded by the United Nations Office for Disaster Risk Reduction. Built beside the Marikina River, an area prone to flooding during severe weather events, SM City Marikina stands on 246 concrete stilts. This innovative design allows floodwaters to flow beneath the structure, leaving the mall and its occupants safe and dry. During Typhoon Ondoy (Ketsana) in 2009, which devastated surrounding areas, SM City Marikina remained intact, serving as a refuge for those affected by the disaster. Similar to the stilts methodology, SM City Cabanatuan’s lower ground parking level serves as a temporary catchment basin.

SM City Cabanatuan demonstrates SM Prime’s dedication to flood mitigation through its robust design. 

SM City Cabanatuan’s lower ground parking level doubles as a temporary flood catchment basin, a crucial element of our flood mitigation strategy. 

Beyond these two malls, this promise of flood resilience is present in other properties. A key innovation employed by SM Prime is the implementation of rainwater catchment basins in its malls. These massive underground tanks, similar in size to swimming pools, collect and store rainwater from the street level, mitigating flooding in surrounding communities. Twenty-nine SM Supermalls across the country are equipped with these basins, boasting a combined capacity of 85,400 cubic meters – enough to fill over 34 Olympic-sized swimming pools!

Built to protect, SM City Masinag incorporates a rainwater catchment basin to minimize the impact of heavy rainfall.

SM City Masinag’s rainwater catchment basin collected 8,652.60 cubic meters of rainwater during Super Typhoon Carina.

Designed with the community in mind, SM City Masinag incorporates flood mitigation measures for safety.

These catchment basins have proven invaluable during recent typhoons. For instance, SM City Masinag’s rainwater catchment basin played a crucial role during Super Typhoon Carina (Gaemi) last July 2024, effectively managing the increased water volume. It collected 8,652.60 cubic meters of rainwater, equivalent to 264 gallons of water. As the first SM mall equipped with a rainwater catchment basin, SM City Masinag was strategically built in a historically flood-prone area, serving as a catch basin for water flowing down from upper Antipolo. In the second half of 2024, SM malls prevented an estimated total of 46,405 cubic meters of rainwater–the volume of 18 Olympic-sized swimming pools–from flooding the surrounding areas.

Mr. Gareth Aboy, a resident and former officer of Vermont Phase 1 Association near SM City Masinag, expressed his gratitude: “The residents of Vermont Park Executive Village of Antipolo would like to extend our thanks and appreciation to SM City Masinag for always being there in our times of need. Thank you for keeping your doors open for our immediate daily needs, your elevated parking spaces for our vehicles, and for keeping your water catchment basin open to help drain the water from our flood-prone village. SM City Masinag has always been and will continue to be a treasure for the residents of Vermont Park Executive Village of Antipolo.”

Sustainability and resilience are at the core of SM Prime’s business strategy. The company invests significantly in these measures, recognizing that the benefits – safer communities, environmental protection, and enhanced business continuity – far outweigh the costs. SM Prime remains committed to building a more resilient future for the communities it serves.


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SM Mall of Asia Complex: A benchmark in resilience and innovation

The SM Mall of Asia (MOA) Complex, a 67-hectare landmark along Manila Bay, showcases SM Prime Holdings’ commitment to leveraging technology and innovation for disaster resilience and community protection for all its projects.

Initially conceived as a pioneering mixed-use development on reclaimed land spearheaded by the Philippine government, it has evolved into a benchmark of safety and stability, fulfilling the vision of founder Henry Sy, Sr., who aspired to create “a destination that brings joy and opportunities to millions.”

Expanding on his father’s vision, Hans Sy, SM Prime Executive Committee Chairman and co-chair of ARISE Philippines under the United Nations Office of Disaster Risk Resilience (UNDRR), emphasizes the importance of creating resilient, sustainable spaces that prioritize both safety and community well-being. 

“We believe that safety is the cornerstone of thriving communities,” Mr. Sy states. In affirmation of this belief, he stands as the first Filipino elected to the UNDRR ARISE Global Board. 

Launched in 2015, ARISE Philippines is the country’s 157-member-strong premier private sector alliance united by a shared vision of a resilient and prosperous future. The organization, the first country network established by the UNDRR, aims to minimize disaster-related loss of life, ensure investments and assets are risk-informed, and build infrastructure capable of withstanding both natural and man-made hazards.

SM Prime’s commitment to resilience is evident in the very design of the MOA Complex, which incorporates cutting-edge disaster resilience features to protect against the unique challenges posed by its coastal location.

Before construction began, SM Prime engaged the expertise of Jan de Nul, a renowned Belgian coastal development company. Their extensive research and studies ensured the viability of the project, taking into account the complex interplay of land and sea. To create a resilient structure, the company conducted risk reviews in which the following components are incorporated: Identify, analyze, plan, mitigate, and monitor. This meticulous pre-engineering phase laid the groundwork for a structure, completed in 2006, that was capable of withstanding the test of time and nature.

One of the key challenges addressed was soil erosion. To combat this, the team implemented a sophisticated system of wick drains. These drains act as pathways for pore water in soft, compressible soil, effectively preventing erosion and ensuring the stability of the land. This technology, while more costly than traditional methods, provides a significantly higher degree of protection, particularly against liquefaction during seismic events.

The threat of ground liquefaction, a phenomenon where soil loses its strength and behaves like a liquid during earthquakes, was also mitigated through innovative foundation design. Driven and bored piles, combined with precise excavation methods, provide the complex with robust resistance against liquefaction and seismic activity.

Reference photo for the driven piles methodology, which protects against soil liquefaction and provides strength against earthquakes.

To protect against storm surges, a common threat in coastal areas, the complex boasts a robust seawall. This seawall, standing 4.5 meters higher than the Mean Lower Low Water (MLLW) mark, is further reinforced by a wave return feature. This inverted structure deflects high waves back towards the sea, minimizing their impact on the complex. A network of drainage channels further enhances flood prevention during storm surges. 

These features were instrumental in protecting the complex during Typhoon Pedring (international name Nesat) in 2011, as well as in all succeeding severe weather disturbances this year, where the MOA Complex emerged largely unscathed while helping nearby areas avoid being inundated by prolonged deep flooding.

The wave return feature redirects water back into the bay, providing protection from high waves.
The Mall of Asia (MOA) Complex higher seawall and elevation prevent damage to the structure from rising sea levels. (Inset) In addition, the drainage channels along the MOA Complex are wide and deep enough to fit two buses side by side, helping prevent flooding from storm surges.

The complex’s resilience extends beyond its foundation. The main road and all structures are elevated significantly above the National Building Code requirements, further minimizing the risk of flooding. Buildings are equipped with Earthquake Recording Instruments (ERI) that monitor seismic activity and provide valuable data for disaster preparedness. 

The structural integrity of the buildings themselves is also paramount. The roof deck, for instance, is designed to withstand substantial loads, ensuring it can serve as a safe refuge during emergencies. The exterior façade is concrete masonry walls with Exterior Insulation Finishing Systems (EIFS), designed to withstand wind speeds of up to 270 kph and provide excellent insulation. This commitment to safety transforms SM Supermalls like the SM MOA into havens for the community during times of crisis.

SM Prime’s dedication to disaster resilience is not merely a response to potential threats; it is a proactive strategy integrated into the DNA of all its business operations.  The company automatically allocates a significant portion of its capital expenditure to disaster resilience research and construction, recognizing that investing in safety is an investment in the future.
SM Prime’s longstanding reputation as a responsible property developer is built not only on its contributions to the country’s economic growth and the creation of dynamic lifestyle destinations but also on its unwavering commitment to protecting the lives and livelihoods of the communities it serves. The MOA Complex stands as a powerful symbol of this commitment, a beacon of resilience in the face of natural adversity. 


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