Invited SpeakerS

 

 

 

Associate Professor Edmond Yat-Man LO

Deputy Director, Institute of Catastrophe Risk Management (ICRM)
Nanyang Technological University, Singapore

 

Biography

 

A/P Edmond Lo is currently the Deputy Director of the Institute of Catastrophe Risk Management (ICRM) at NTU, Singapore. He joined NTU in 1996 where he was Head of the Division of Environmental and Water Resources Engineering (2005-08) and Chair of the School of Civil and Environmental Engineering (2008-2011). A/P Lo’s current research work is in flood risk management for S.E. Asian cities with a particular view of how flood resiliency evolves as cities develop under the influence of growing urbanization and climate change. He co-leading ICRM’s efforts in the CREATE Future Resilient Systems program, a multi-university effort led by ETH Zurich. He is also co-PI in ICRM’s flagship Natural Catastrophe and Data Analysis Exchange project wherein high resolution satellite imaging is being applied to develop building exposure models for risk assessment in major Southeast Asian cities.

 

 

 

Speech Title "Thermal and Flow Structures in Tropical Shallow Lakes"

 

Shallow lakes are important water bodies as sources of raw water in many tropical countries. Tropical shallow lakes or reservoirs are also susceptible to algal blooms due to high light levels, warm temperatures and abundant ambient nutrient supply. A long term sustainable approach for maintaining water quality requires a strong scientific understanding of the thermal and flow dynamics in these water bodies as interlinked with algal dynamics.
How shallow tropical lakes or reservoirs behave hydrodynamically have important consequences in their biological response. Towards such understandings, a series of earlier field data collection was conducted for Kranji Reservoir, a shallow tropical reservoir in Singapore. Both short term and long term data were collected with the short term data being intensively sampled data over July 2012, during Singapore’s Southwest Monsoon season. The short term data comprised meteorological and temperature data, along with microstructure turbulence data. This underpinned analysis for an improved understanding of the thermal and flow structures, particularly on the Surface Mixed Layer (SML) dynamics. The diurnal evolution of the SML showed a daytime layer affected by turbulence billows and winds, and a thicker nighttime layer as deepened by the penetrative cooling. The strength of vertical mixing was important for the vertical shaping of temperature as well as phytoplankton.
The longer term ADCP velocity and thermister chain data indicated a three-layer flow and thermal structure during the daytime, and a two-layer structure during the nighttime. Numerical simulations using the Estuary and Lake COmputer Model (ELCOM) also showed this diurnal pattern of flow and thermal structure as mainly driven by upwelling generated by southerly July monsoonal winds and horizontal temperature gradient induced by the differential cooling. The ELCOM results further revealed the existence of mean flow circulation patterns which changed for daytime and nightime periods. This has implications for the spatial distribution of chlorophyll concentration during the Southwest Monsoon (as represented by the July period), which was then investigated based on the circulation pattern deduced from ELCOM simulations. Results and implications from both the SML dynamics and mean flow circulations will be further elaborated in the talk.

 

 

 

 

 

 

Associate Professor Su Yean Teh
 

Universiti Sains Malaysia

 

Biography

 

Su Yean Teh received her Bachelor of Mathematics, Master of Science and Doctor of Philosophy in Mathematical Modelling in 2004, 2005 and 2008 respectively, all from Universiti Sains Malaysia (USM). In 2006, she was awarded the UNESCO/Keizo Obuchi Research Fellowship to undertake research on “Management Modelling of Everglades Wetlands Hydrology and Ecosystems” at University of Miami, Florida, USA. Presently, she is an Associate Professor at the School of Mathematical Sciences, USM. Her research interests revolve around mathematical modelling with particular focus on computational simulation of real-life problems to provide insights and to suggest possible solutions. She works on various topics in ecosystem and environmental modelling, many of which were initiated and driven by the needs of the country or industry. She was invited on various occasions to visit University of Miami and Nanjing Forestry University under U. S. Geological Survey grants. She was also sponsored by ICTP to attend four workshops at Abdus Salam International Centre for Theoretical Physics (ICTP) at Trieste, Italy and by Brown International Advanced Research Institutes (BIARI) at Brown University to participate in Climate Change and Its Impacts: Connecting Local Variability and Knowledge in a Global System. She was awarded the prestigious L’Oréal-UNESCO for Women in Science Malaysia Fellowship 2017 for her research on unifying STEM towards sustainable management of our coastal resources. She is currently an Associate Editor of Springer’s Hydrogeology Journal. She has published numerous articles, most notably in Journal of Asian Earth Sciences, Ecosystems, Ecological Modelling, Landscape Ecology, Agricultural and Forest Meteorology, Hydrogeology Journal, Environmental Science and Pollution Research, Theoretical and Applied Mechanics Letters and Journal of Marine Science and Engineering.

https://math.usm.my/index.php/academic-profile/186-teh-su-yean
https://sites.google.com/view/tehsuyean
http://orcid.org/0000-0003-4404-661X

 

 

 

 

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