PhD Oral Defense of Janneli Lea Soria: Geomorphic and Sedimentologic Imprints of Typhoons Durian and Haiyan Storm Surges on the Philippine Coasts
- Oral Defense
About the Event:
Typhoon Haiyan tragically highlighted our limited and patchy knowledge on how storm surges immediately impact Philippine coastal communities, despite the events’ repeated occurrence. Meanwhile, Typhoon Haiyan gained global interest because of its sustained high intensity even after landfall, the extensive damage, and the high casualty rate resulting from the extremely high-velocity flow comparable to a tsunami. In the presentation, the impact of Typhoon Haiyan (locally termed Yolanda) will be compared with the impact of the 2006 Typhoon Durian (locally termed Reming), focusing on the geomorphic and sedimentologic imprints of storm surges and the resulting coastal overwash. While this work primarily built upon a geological framework of storm surge inundation, it has benefited considerably from integrating inputs from multiple disciplines including meteorology, oceanography, coastal engineering, and history. Overall, the multi-disciplinary approach led to (1) local understanding of storm surge dynamics and the factors affecting the spatial variation of amplification leading to inundation overland; (2) characterization of the onshore geomorphic and sediment imprints within the bounds of hydrodynamic conditions and sediment transport processes; and (3) historically oriented investigation of storm surge heights and the geologic impacts to the coasts near typhoon landfalls.
Members of the Examination Committee:
- Associate Professor Robert Weiss (External Examiner), Department of Geosciences, Virginia Tech, USA
- Associate Professor Brian Jones (External Examiner), School of Earth and Environmental Sciences, University of Wollongong, Australia
- Assistant Professor Emma Hill (Internal Examiner), Earth Observatory of Singapore and Asian School of the Environment, Singapore
- Associate Professor Nathalie Goodkin (Chair), Earth Observatory of Singapore and Asian School of the Environment, Singapore
- Associate Professor Adam Switzer, Earth Observatory of Singapore and Asian School of the Environment, Singapore
About the Speaker:
Janneli Lea Soria is a PhD candidate whose expertise lies in coastal geomorphology and sedimentology, and their application to coastal hazards. She received her Bachelor’s and Master’s degrees in Geology from the University of the Philippines (Diliman, Quezon City). While pursuing her Master’s degree, Lea held concurrent positions as a Researcher at the National Institute of Geological Sciences and at the Marine Science Institute, both at the University of the Philippines. In August 2011, she joined the PhD program at NTU with the then Division of Earth Sciences (now the Asian School of the Environment). In her PhD research, she investigates storm surges in the Philippines at different timescales – from prehistoric events archived in coastal sediment sequences to recent events (e.g., 2013 Typhoon Haiyan, 2006 Typhoon Durian). During her PhD, she has worked closely with her advisor, Associate Professor Adam Switzer, and collaborated with geologists, physical oceanographers, and engineers from Philippine, US and German universities.