Author(s): Imee Bren Villalba
Linked Author(s):
Keywords: Cagayan coast; Storm tide; ADCIRC; Typhoon Mangkhut
Abstract: The northern coast of Cagayan in the Philippines is considered prone to storm surges because it receives the highest frequency of typhoons traversing the country and has a gentle sloping nearshore bathymetry. This study aims to simulate the storm tides produced by historical typhoons along the northern coast of Cagayan in order to assess and describe the water levels during the passage of strong typhoons. Four (4) recent strong historical typhoons are selected and simulated in this study, namely, Typhoon Nu ri 2008, Typhoon Nanmadol 2011, Typhoon Noul 2015, and Typhoon Mangkhut 2018. The Advanced Circulation (ADCIRC) model is used to numerically simulate the historical storm tides along the northern coast of Cagayan and the typhoon wind and pressure fields are simulated using the Holland 1980 Typhoon Model. The hydrodynamic model is calibrated using the water level data from NAMRIA station at Port Irene, Cagayan. Results show that the maximum simulated storm tide level is below 2 meters along the northern coast of Cagayan with the maximum storm tide height occurring at the towns of Buguey and Gonzaga. The results of this study will be helpful in storm surge awareness and in the preliminary design of storm surge disaster prevention and mitigating measures in Cag ayan, Philippines.
Year: 2020