FLOODMAP: FLOOD LOCATION AND OVERLAY-ORIENTED DIGITAL MAPPING FOR HIGHLIGHTING AT-RISK BARANGAYS IN TANJAY CITY THROUGH GIS-BASED HAZARD ASSESSMENT
Keywords:
Flooding, FloodMap, GIS based tool, Disaster Risk Reduction and ManagementAbstract
Flooding is a common hazard in the Philippines, particularly in Tanjay City, where low-lying areas, rivers, and tidal flow create dangerous conditions within the municipality. In response to these risks, this study aims to strengthen local disaster readiness by developing a GIS based tool for identifying susceptible flood areas using spatial, hydrological and historical flood data. Data were gathered from Provincial Disaster Risk Reduction and Management Office and Planning and Development Office and these various data types from .csv files whereby attributes of datasets were tailored to closely align with their appropriate field within the shapefiles from igismap.com and were utilized within QGIS and then streamed as layered maps with risk scores based on municipal barangays. Barangays that were designated as high risk were Luca, Manipis, Polo and San Jose. Azagra. Bahian, Pal-ew, Sta. Cruz Nuevo and Sto. Niño were considered low risk. Novallas, Obogon, barangay 1, barangay 2, barangay 8, San Jose, and Sta, Cruz Viejo was at a moderate risk level. There was a close match between historical flood incidents and the GIS-generated flood risk scores. The maps generated were validated with barangay officials and DRR personnel to ensure its accuracy and validity. FLOODMAP is a fact-based and trustworthy decision-support tool for disaster preparedness and public awareness. Ethical standards were upheld throughout the project's research process, securing reliability, accurate records, good practice, and avoiding misconduct such as fraudulent misrepresentation or plagiarism, thus ensuring FLOODMAP as a reliable tool to enhance flood resilience within Tanjay City.
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Copyright (c) 2026 Lady Heart D. Egarote, Nathalie Mae S. Lado, John Carl M. Manaban (Author)
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