GIS-Based Approach: A Flood Hazard Map Development of Brgy. Aldavoc, Tagkawayan, Quezon

Completed2024

Abstract

People widely recognize flooding as one of the most dangerous natural disasters, causing significant economic damage and environmental destruction. The research integrated geospatial analysis, shapefile data, QGIS, and ArcMap tools to analyze the flood risk index and create a comprehensive flood hazard map of Brgy. Aldavoc, Tagkawayan, Quezon Province, which is known for its vulnerability to flooding and can serve as a reference for disaster emergency planning. A traverse, relocation, and topographic survey were performed, which verified the political barangay boundary and obtained elevation data for the location area. The study revealed that Brgy. Aldavoc's highest elevation is approximately 103.500 meters, located at the coordinates 20398.886 N, 19633.218 E, and its lowest elevation is 100.345 meters, situated at the coordinates 20081.404 N, 19687.649 E. The data collected was generated and rendered in AutoCAD Civil 3D with GE Survey software through formulate a topographic plan. Through the application of QGIS 3.0 and ArcMap, multiple maps were generated, including DEM (Digital Elevation Model), slope, river/stream, and precipitation, facilitating the development of a flood hazard map. Analysis of the flood hazard map revealed areas at varying risk levels— areas with low elevation, near bodies of water, and a record of previous flooding incidence—are prone to flooding and range from very high risk to moderate risk of flooding. Local residents, LGUs, and MDRRMO of the Municipality ofMANUEL S. ENVERGA UNIVERSITY FOUNDATION Lucena City An Autonomous University DR. CESAR A. VILLARIBA RESEARCH AND KNOWLEDGE MANAGEMENT INSTITUTE QUALITY FORM Document Code: DCAVRKMI-F-PSFR Tagkawayan, Quezon evaluated the effectiveness of the flood hazard map, indicating its potential significance for disaster mitigation planning.

Keywords

Flood Hazard Map
Flood Risk Assessment
Geographic Information System
Geospatial Analysis
Topographic Survey
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