Christopher Tapnio

Christopher Tapnio in his #UPRI Knowledge Sharing lecture entitled “Ecosystems-based Adaptation and Resilience” | Photo courtesy: UP Resilience Institute YouTube Channel

Title of Master Project: Village Level Green-Gray Management Strategies for Coastal Protection: The Case of Polillo, Philippines


The Philippines as an archipelagic country ranks among the top 5 countries vulnerable to the effects of climate-induced hazards. It also is one of the countries where sea level rise (SLR) – an inevitable consequence of climate change, has already occurred and is being felt. Small island communities bear the brunt of these hazards including typhoons, storm surges, intense monsoon season, flooding, and rainfall-induced landslides. Libjo, Polillo, Quezon is an island village located along the eastern seaboard facing Burdeos Bay and the Philippine Sea. These vulnerabilities were measured using quantitative, qualitative, community-based participatory research methods supplemented by coastal multi-hazard maps. Results show that the coastal communities are at risk from typhoons, intense monsoon, storm surge, and coastal flooding. Consequent hazards based on the coastal maps produced indicate high hazard levels in ecosystem disruption, erosion, flooding, salt water intrusion, and gradual inundation. Green infrastructure such as mangrove forests need to be restored and rehabilitated to provide the needed coastal protection. Thus, it is recommended that Green-Gray management strategies be incorporated and mainstreamed in the development plans of the community aimed at improving the existing coastal protection and upscaling resilience in these coastal communities at risk.

Watch his #UPRI Knowledge Sharing lecture at