Browsing by Author "Bellong, Hermond D."

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    Flood susceptibility of coastal Municipalities in the Province of La Union using Geographic Information System (GIS) and analytic hierarchy process (AHP) techniques
    (Don Mariano Marcos Memorial State University - North La Union Campus, 2025-05) Bellong, Hermond D.
    In response to the 2023 data release, it has become evident that a new and comprehensive flood susceptibility map for the Province of La Union is critically needed. Hence, this research examines flood susceptibility trends in La Union's coastal municipalities and explores how Geographic Information Systems (GIS) and the Analytic Hierarchy Process (AHP)—a tool recently introduced to all Provincial and Municipal Disaster Risk Reduction and Management Officers (MDRRMOs) in the province—can be effectively applied to model and map flood-risk areas. The most important physico-climatic factors considered in this study include land use/land cover (LULC), elevation, slope, rainfall, and flow length. Using a quantitative approach, the MDRRMOs completed AHP checklists to assign weights to each parameter. The results revealed that the most flood-prone areas are the City of San Fernando, Bauang, Luna, Bangar, and Agoo, primarily due to their low elevations, proximity to the coast, and highly intensive land use. The generated flood susceptibility map provides valuable information for local authorities to support land-use planning, infrastructure development, and disaster preparedness. The study demonstrates the potential of integrating GIS and AHP in assessing flood risk, thereby facilitating sustainable and science-based disaster management in coastal communities prone to flooding.