Risk assessment of the selected tropical cyclone severe winds in Bulacan, Philippines
Loading...
Date
2023
Authors
Jaymee Lhyn M. Coronel
Journal Title
Journal ISSN
Volume Title
Publisher
Abstract
The geographical feature of Bulacan (uplands, low-lying and coastal areas) belongs to the identified factors prone to the impact of severe winds. However, no study has been conducted focusing on the risk of the province to Tropical Cyclone Severe Winds (TCWS). In this study, Typhoon Ulysses, Severe Tropical Storm Paeng, and Super Typhoon Karding, the three (3) severely wind-damaging tropical cyclone (TCs) events that made landfall in the vicinity of Bulacan from 1998-2022 are selected using the Systematic Observational Method and analyzed in determining the risk of each city municipality of the province with respect to the exposure and vulnerability of the population and the residential real property units (RPUs) or the houses.
The peaking wind gust of the selected TC events on their entire TC duration are produced by the Tropical Cyclone Risk Model (TCRM) and by using the zonal statistics, the municipal mean wind speeds (MMWSs) mare produced. the vulnerability analysis is done by utilizing the vulnerability ratio of each building type, adapted from UP-ICE, to certain wind intensity by which the vulnerable houses are quantified with the associated number of vulnerable populations inhabiting the affected houses. Standardization of data is done by obtaining the weighted values of the variables to be easily processed. In the assessment of risk, the variables hazard, vulnerability and exposure were used and employed in the conventional risk equation R= H x V. The hazard and vulnerability scales of Wang, et al (2021) are utilized to effectively qualify the risk of the ICSW to Bulacan.