Two-dimensional flood hazard mapping in Gingoog River, Mindanao

Seminar paper from the year 2016 in the subject Geography / Earth Science - Meteorology, Aeronomy, Climatology, grade: 2, Central Mindanao University, language: English, abstract: This paper presents the application of Hydrologic Engineering Center - River Analysis System (HEC-RAS) version 5.0, the beta version of the program, in the floodplains of Gingoog River, Mindanao by producing flood hazard maps integrated with the high resolution terrain data of Light Detection and Ranging (LiDAR). Aside from its ability to perform two-dimensional (2D) unsteady flow modeling and 2D unsteady flow routing, HEC-RAS has expanded capabilities in topographic processing of terrains used in model geometry development and additional post-processing model features such as 2D animations in flood mapping. Utilizing this application, the integration of LIDAR data presents detailed hydraulic table properties for computational cells and cell faces for 2D flood simulation. Resulting generated 2D flood maps shows more enhanced representation and precise quantification of flood extents helpful in identifying the priority areas for immediate responses especially during flood disaster scenarios. Development of these maps answers the dire need of the Local Government Units including the Disaster Risk Reduction Management Council (DRRMC) of Gingoog City to have more accurate and reliable flood maps to a more enhanced disaster strategies as well as to be used as basis for future policy implementation (i.e. land use zoning, construction of establishments).