GEO-HAZARD MAP

This Flooding Map of Barangay Ayahag in the Municipality of Saint Bernard, Southern Leyte illustrates the terrain and key features related to flood risk based on its legend. Contour lines represent elevation and land slope, helping identify areas prone to water accumulation. The Lawigan River (blue line) shows the main waterway influencing flood behavior, while barangay roads (red lines) indicate access routes that may be affected during flooding. Culvert P-III and Culvert P-I areas (gray shaded zones) mark drainage structures important for water flow management. The perimeter boundary outlines the mapped area, supporting planning, monitoring, and flood risk management.

This Erosion Map of Barangay Ayahag in Saint Bernard, Southern Leyte, illustrates a total land area of approximately 375.49 hectares defined by a bold black perimeter. The map uses dense contour lines to show the local topography, highlighting Mount Kaabag as a significant elevated feature covering 45.33 hectares (shaded in yellow) in the western portion of the village. Most critically, the legend identifies a specific area of 6.25 hectares (shaded in orange) along the eastern side that is subject to Lawigan River Erosion, marking it as a key zone for environmental monitoring and disaster risk management.

The Flood Map of Barangay Ayahag Relocation site in Saint Bernard, Southern Leyte, identifies key hydrological and geological features that influence the area’s safety profile. According to the legend, the map tracks the path of three primary water bodies—Cuaton Creek, Magbagacay Creek, and Malibago Creek—which are represented by blue dashed lines and grey shaded areas to indicate their flow and surrounding flood-prone zones. Additionally, a distinct dark red area on the right side of the map marks zones vulnerable to Mountain Erosion, while thin black Contour Lines provide elevation context to show how water naturally drains across the terrain. All these features are contained within the site’s official Perimeter, providing a clear overview of environmental risks for the relocation area.

The Erosion Map identifies a total perimeter of 3.44 hectares, highlighting two primary risk zones: a 461 sq.m. area prone to Mountain Erosion (dark red) and a ~204 sq.m. zone affected by Creek Erosion (grey shading with blue dashed lines). Complementing this, the Flood Map outlines the specific hydrological risks within that same perimeter, tracking the flow of Cuaton, Magbagacay, and Malibago Creeks. Together with the elevation data provided by the Contour Lines, these maps serve as a guide for identifying safe buildable zones versus areas susceptible to soil loss and water overflow.