Assessment for the Design Elevation of the Calumpang Bridge in Batangas, Philippines at Different Rainfall Return Periods and the Typhoon Rammasun Flood Event with the Introduction of LiDAR Data
A.F. Gorospe1, E.A. Barez2, J.K. Coloso3, J.C. Enzon4, F. J. Tan5, F.A.A Uy6
1F. J. Tan, School of Civil, Environmental, & Geological Engineering, Mapúa University, Muralla St., Intramuros, Manila, Philippines.
2A.F. Gorospe, School of Civil, Environmental, & Geological Engineering, Mapúa University, Muralla St., Intramuros, Manila, Philippines.
3E.A. Barez, School of Civil, Environmental, & Geological Engineering, Mapúa University, Muralla St., Intramuros, Manila, Philippines.
4J.K. Coloso, School of Civil, Environmental, & Geological Engineering, Mapúa University, Muralla St., Intramuros, Manila, Philippines.
5J.C. Enzon, School of Civil, Environmental, & Geological Engineering, Mapúa University, Muralla St., Intramuros, Manila, Philippines.
6F.A.A Uy, School of Civil, Environmental, & Geological Engineering, Mapúa University, Muralla St., Intramuros, Manila, Philippines.
Manuscript received on 14 December 2018 | Revised Manuscript received on 26 December 2018 | Manuscript Published on 24 January 2019 | PP: 178-181 | Volume-7 Issue-4S2 December 2018 | Retrieval Number: ES20101017519/19©BEIESP
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© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC-BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: On July 2014, Typhoon Rammasun destroyed the Calumpang Bridge over the Calumpang River in Batangas, Philippines. While re-habilitation efforts for the bridge have finished, the validity of its elevation still needs to be studied. In order to create an elevation design that prevents flooding from reaching the bridge, a study was conducted using HEC-RAS, HEC-HMS, GIS software, and LiDAR data to model the hydraulic response and generate indundation maps of the Calumpang River during different rainfall return periods. It was found that: (1) only the downstream areas of the floodplain are significantly affected by flooding events from Typhoon Rammasun and at 15, 25, 50, and 100 year return periods, (2) water surface elevation only reached up to 4.45 meters during the typhoon, and (3) the 9-meter high deck of the rehabilitated Calumpang Bridge is safe from water reaching over the deck.
Keywords: Bridge, Elevation, Hydrologic Modelling, Lidar, Inundation Maps.
Scope of the Article: Design Optimization of Structures