Iloilo province embraces nature-based solutions for a resilient future

By Victor Prodigo

The Urgent Need of a New Approach to Water Security and Flood Control

Iloilo Province stands at a crossroads, facing escalating water-related threats from intensified heavy rainfall and rising sea levels that demand immediate, decisive action. The urgent necessity to safeguard communities and the economy, a reality sharply underscored by the devastating floods recently witnessed in Cebu City, serves as an undeniable wake-up call. To build lasting resilience, Iloilo must move beyond outdated methods and fully embrace a complete overhaul of traditional planning and governance, securing its lives, infrastructure, and vital economic base for the future.

The annual cycle of devastating flood events demonstrates that relying solely on concrete structures (gray infrastructure) is proving insufficient against the increasing intensity of climate change impacts. The province requires a more resilient and sustainable plan to effectively manage risk and protect its crucial economic sectors.  The challenge is intensified by severe environmental degradation that weakens the province’s natural defenses and key issues that need to be addressed:

• Watershed Vulnerability and Flood‑Prone Runoff. Widespread erosion along major river systems, coupled with low forest cover in the uplands surrounding key watersheds like the Tigum-Aganan, Jalaur, and Suage, significantly diminishes the land’s natural capacity to absorb water. This degradation contributes to rapid flood runoff and massive volumes of siltation that clog vital river channels and irrigation networks, decreasing their water conveyance capacity.
• Weakened Coastal Barriers. Coastal resources are also suffering such as depleted mangroves, sea grasses, and coral reefs are weakening the natural defense barriers against strong storm surges.

The Staggering Cost of Inaction: Threat to Iloilo’s Food Security

Iloilo’s prosperity faces a continuous and escalating threat from water-related disasters, which routinely submerge thousands of hectares of prime agricultural land and fishponds. The economic costs are staggering. Provincial confirm that recent flood events from Typhoons Uwan and Tino this November alone resulted in a massive ₱438.25 Million loss in the farm and fishery sectors, impacting over 15,000 individuals and causing volatile market prices. This instability is compounded by the persistent ecological damage caused by sediment runoff and pollution from degraded watersheds, which destroy fish spawning grounds and coastal habitats, leading to a consistent 25 percent reduction in local fish catch over recent seasons. Immediate action to protect these resources is not merely an environmental concern, but a critical investment to guarantee long-term food security and economic stability for Iloilo province.

Nature-Based Solutions: The Smart, Sustainable Path to Resilience

Nature-Based Solutions (NbS), which Iloilo province is already doing, offer a smart, enduring, and proven strategy for effective water management and flood control by utilizing and enhancing natural ecological processes. Specifically, restoring forest cover and establishing protective vegetation buffers along major rivers like the Tigum-Aganan, Jalaur, and Suage enables the land to act as a natural sponge, significantly increasing soil permeability to absorb enormous volumes of rainwater. This approach critically reduces the speed and volume of water reaching low-lying areas during peak rain events, while also providing multiple benefits like natural water filtration. Moreover, the integration of Green-Gray Infrastructure, combining traditional engineering with NbS like mangrove restoration, riparian planting and agroforestry, delivers a powerful combination that stabilizes uplands, shorelines, reduces disaster risk, and simultaneously supports local livelihoods, marking a crucial shift toward building holistic ecological and climate resilience.

Implementing Ridge-to-Reef as Integrated Strategy for Iloilo

Adopting the Ridge-to-Reef (R2R) framework provides Iloilo Province with the only truly comprehensive strategy for protection, recognizing the vital interconnectedness of all its ecosystems, from mountain to sea. This powerful approach begins at the ridge component with upland reforestation and assisted natural regeneration, which aggressively mitigates soil erosion and captures rainfall at the source to protect watershed headwaters. It continues through mid-and lower level interventions focused on agroforestry, sustainable farming and riverbank stabilization, before culminating at the reef component through the essential restoration of coastal ecosystems like mangroves and seagrass beds. This fully integrated approach ensures that every effort, from planting a tree in the uplands to restoring a mangrove along the coast, complements and dramatically reinforces protection across the entire landscape, delivering maximum defense against climate threats.

Strategic Focus for Safeguarding Iloilo’s Lifelines

For maximum impact, the project’s strategic focus must decisively target the three critical river systems: the Tigum-Aganan, Jalaur, and Suage Watersheds. These aren’t just rivers, they are the lifelines of Iloilo, supplying water to thousands of farm families and providing essential drinking water to major centers. Protection of the Tigum-Aganan Watershed is paramount as it serves as the primary source of potable water for Iloilo City, directly ensuring long-term urban water security. Meanwhile, the Jalaur River’s upstream environmental integrity is crucial for the efficiency and operational longevity of the major dam project located in Calinog, and the Suage River supports vast agricultural production constantly threatened by seasonal floods. By concentrating NbS interventions in these high-priority watersheds, the province can yield the greatest benefits in water supply stability and flood reduction.

Blue-Green Growth: Securing Iloilo’s Food Future through Nature

Promoting Sustainable Agriculture and Aquaculture through NbS is not just an environmental choice.  It’s the key to boosting Iloilo Province’s economic resilience and food security. By implementing techniques like assisted natural regeneration, agroforestry, and conservation farming (such as contour farming and cover cropping) in upland and agricultural areas, topsoil loss is directly minimize, effectively acting as a nutrient bank for crops and halting the disastrous siltation that chokes rivers and irrigation systems. Simultaneously, the restoration of coastal mangroves and healthy river flows is vital for local fisheries, as these ecosystems function as critical nursery and feeding grounds for aquatic life. By integrating sustainable aquaculture with mangrove rehabilitation and empowering local farmers and fisherfolk as active environmental stewards, Iloilo can secure long-term food output and cultivate a genuinely profitable, resilient agricultural economy.

Transboundary Water Management: Unifying Iloilo’s Water Governance

Effective water management and flood control in Iloilo Province critically demand Transboundary Water Management, recognizing that water flow and flood impacts disregard political boundaries, affecting multiple municipalities along river basins. The crucial next step is to establish a formal inter-LGU framework to foster strong collaboration among all LGUs, which facilitates coordinated planning for flood preparedness and ensures the equitable sharing of water resources during dry periods. Ultimately, strong leadership from the Provincial Government is essential to unite municipal and barangay efforts under a single, unified water governance plan.  It is a systemic integration that is a key to maximizing the long-term effectiveness of the NbS approach across the entire province.

Maximizing Value: Biodiversity, Ecosystem Services, and Fiscal Prudence

The NbS project serves as a powerful twin strategy for both environmental protection and economic stability, safeguarding Iloilo Province’s rich biodiversity while ensuring fiscal prudence. By restoring native forests in the uplands and protecting unique riverine and coastal ecosystems, the province not only creates vital habitat for threatened species and increases overall climate resilience, but also ensures the continued, cost-free flow of essential ecosystem services, from clean air and water to natural pest control. Simultaneously, NbS consistently demonstrate superior cost-effectiveness compared to purely gray infrastructure.  For example, mangrove restoration can provide storm protection at a fraction of the cost (up to 60% savings) while actively supporting local fisheries. The World Bank (2022) revealed that the coastal protection benefits from mangroves can exceed $10,000 USD per hectare annually in highly developed areas.  Crucially, a restored ecosystem is a self-sustaining investment that naturally increases in value and effectiveness over time. This approach fundamentally promotes an economically sound model where environmental health directly underpins the long-term health and prosperity of all Ilonggos.

Local Ownership: Fueling Scalable Success for Nature

The visions and unwavering support from Iloilo’s local government leaders is the essential catalyst guaranteeing this project’s success, providing the crucial personnel, resources, and aligned policy directives needed for implementation. The strategy begins with an initial pilot phase in critical sub-watersheds.  Documented success here will rapidly establish a scalable model for province-wide expansion. This strong local ownership is not just administrative.  It is foundational ensuring vital policies on land use, waste management, and zoning are perfectly integrated with the NbS framework. This transformation effectively transitions the NbS initiative from a concept to a fully embedded, self-sustaining provincial program that secures long-term environmental and economic resilience for all of Iloilo.

Transforming Governance: The Shift to Unified Climate Resilience

The escalating challenges of climate change demand a fundamental overhaul of the LGU planning process, compelling a decisive move away from the traditional, isolated departmental silos that cripple effective coordination. Addressing complex issues like flood control and water security requires a truly comprehensive approach. It is achieved by transforming LGU planning into a fundamentally inclusive mechanism. This forces a vital institutional shift where departments including Engineering, Agriculture, Environment, and Social Welfare plus the Disaster Risk Reduction Office (DRRO) fully integrate their strategies. The DRRO’s role is critical in disaster.  It manages preparedness, response, and risk assessment, and should actively participate in environmental planning by providing adaptation plans to vulnerable communities. This structured, inter-departmental process ensures that all NbS interventions are supported by coherent policies and dedicated budget allocations, thus building the genuine, sustained capacity required to future-proof the province.

Call to Action: Securing Iloilo’s Future with Nature-Based Solutions

Iloilo Province stands at a decisive moment to protect its future from the escalating threat of water-related disasters, which traditional infrastructure has proven insufficient to combat. This critical urgency, underscored by recent devastating regional floods, is the impetus behind the proposed NbS Project, championed by the author and former DA Regional Executive Larry Nacionales, offering a clear, proven, and sustainable roadmap to stability. The project’s immediate focus is to equip LGUs with the crucial capacity to effectively plan, cost, and budget for NbS, enabling the rapid implementation of Ridge-to-Reef protection across the vital Tigum-Aganan, Jalaur, Suage watersheds and aquaculture municipalities. This essential investment will not only control floods and promote water security but also significantly strengthen the local economy and preserve Iloilo’s invaluable natural heritage for generations.

Victor “Touch” Prodigo is an advisor specializing in NbS and the Ridge-to-Reef Strategy, with diverse and outstanding experience in agriculture, upland and coastal/marine environmental projects financed by international organizations.