Flood Simulation and GIS Mapping in Flood-prone Region of the Philippines: Efforts and Issues in Contingency Planning

Abstract

This paper targeted the flood-prone Calumpit municipality, Bulacan province, in the Pampanga River basin, Republic of the Philippines, and prepared a resource map, inundation map, inundation probability map, and inundation chart for time-series flood contingency planning by flood simulation using the rainfall-runoff-inundation model and GIS mapping. For preparing these materials to support local evacuations, GIS data such as high-resolution digital elevation models and accumulated flood records are required. In addition, to show local inundation vulnerability, understanding landform development based on the geographical point of view as well as flood simulation is important. Simultaneously, continuous support for local people to improve their skills in thinking and acting by themselves at the time of floods will help mitigate damage