Akira-Kawamura

Tokyo Metropolitan University, Japan

 

Dr. Akira Kawamura is a Professor Emeritus at the Department of Civil and Environmental Engineering in the Graduate School of Urban Environmental Systems. He finished his Bachelor of Engineering degree at the Department of Environmental Civil Engineering in Kumamoto University, Japan in 1978. Meanwhile, he finished both his Master of Engineering and Doctor of Engineering degrees at the Department of Civil Engineering Hydraulics in Kyushu University, Japan in 1980 and 1985, respectively. Dr. Kawamura started as a Research Associate in Kyushu University in 1985 in which he would later serve as an Associate Professor from 1993 to 2004 in the same university. He then served as a Professor, from 2004 to 2021, and as a Professor Emeritus, from 2021 to the present, in Tokyo Metropolitan University. He was engaged in many professional activities which includes serving as Vice-President for the Japan Society of Hydrology and Water Resources from 2014 to 2016 and serving as Chairman for both the Committee on Global Environment and Editorial Committee on Annual Journal of Global Environment Research for the Japan Society of Civil Engineers (JSCE) from 2017 to 2019. Currently, since 2016, he is the Chairman for the Editorial Committee on Journal of Hydrological System for the Association for Rainwater Storage and Infiltration Technology. Focusing on hydrology and water resources engineering, his research contributions include 198 journal papers, in which 44 are Impact Factor (IF) papers, 11 book chapters, 125 international conference papers, 29 memoirs report papers, and 324 domestic conference papers. One of his lead authored IF paper focused on investigating the barriers to integrated flood risk management adaptation in Metro Manila, Philippines which was published in 2019.

Speech title "How did the Great East Japan Earthquake Affect the Groundwater Levels in Tokyo?"

Abstract-Not only whole Japanese Archipelago but also many Southeast Asian countries are in serious peril of severe earthquakes as witnessed in the past, because it is situated in the Circum-Pacific Seismic Zone caused by the plate tectonics. Most of the megacities in Japan as well as other Southeast Asian countries are located on the alluvial plains where the ground is very soft and especially vulnerable for groundwater related disasters like landslides and liquefactions. Since groundwater is a crucial water resource for most of the cities around the world, it is very important as the first step to understand and evaluate the impact of a massive earthquake on the groundwater levels for developing disaster risk deduction countermeasures for land subsidence and liquefaction. However, so far, almost no such studies have been carried out mainly because no densely distributed groundwater level observations were available at a short time interval when a huge earthquake occurred. In Tokyo Metropolis, the hourly groundwater levels have been observed at 42 sites sine 1952 in order to mainly monitor the land subsidence situation. When the Great East Japan Earthquake occurred on March 11, 2011, which was the strongest earthquake on record in Japan (the 4th biggest in the world) with a magnitude of 9.0 (Mw), large fluctuations of confined and unconfined groundwater levels were observed at 102 observation wells in Tokyo, although Tokyo is located around 400 km away from the epicenter. In this study, taking full advantage of the unique rare case data from the dense groundwater monitoring network in Tokyo, we identify the fluctuation patterns of groundwater levels caused by the Great East Japan Earthquake using Self-Organizing Maps (SOM). Interestingly, both abrupt rise and sharp drawdown patterns of groundwater level were identified right after the earthquake for most of the wells. After abrupt rise or drawdown, the groundwater fluctuation patterns during the month are classified as one of the three typical patterns: keeping the rise or drawdown, recovering gradually to the original level, and over recovering more than the original level. The causes of those patterns are also investigated in this study.
 

 

 

Kenichiro-Kobayashi

Saitama University, Japan

 

Prof. Kenichiro Kobayashi received his B.Eng. from Waseda University, M.Eng. from the University of Tokyo, and PhDs from Stuttgart University Germany and Kyoto University. After working at Kobe University as an Associate Professor, on April 2024 he became full Professor at graduate School of Science and Engineering, Saitama University. His main research topic has been the multiphase flow simulations in the subsurface, flood modellings, impact studies using climate/weather forecastings and high-performance computing. In Germany, he simulated the methane migration processes in the subsurface using two-phase (gas and liquid) and two-phase/three-component (gas and liquid phase, air, water and methane components) models. Likewise, he coupled an optimization model with the multiphase models and detected some optimized locations for the methane extractions. His current main research is high-performance computing on flood simulations. After moving to Saitama, he has been eager to make very high-resolution flood simulations on the Tokyo Metropolitan Area with the Radar rainfalls and a super-computer Fugaku. He is currently the chairperson of glocal climate change adaptation group of the committee on Hydroscience and Hydraulic Engineering at Japan Society for Civil Engineers (JSCE). He has been working for UNESCO, especially at South East Asia and Pacific Regions and served as the editor in Chief for Catalogue of Hydrologic Analysis. Also, he joined JST-JICA project at Ghana, Africa, then held international training course for the west African authority with World Bank. Through these activities, he received an international contribution award from JSCE.

 

 

 

Jiutian Zhang

Beijing Normal University, China

Dr. ZHANG Jiutian is professor and executive director of Green Development Institute at Beijing Normal University. Before this position, he had 12 years experience in climate, energy and sustainable development (SD) area as Director in The Administrative Centre for China’s Agenda 21 (ACCA21), Ministry of Science and Technology of China (MOST). He is now the director of committee of carbon neutrality, Chinese Society for Sustainable Development, and secretary of committee of CCUS, Chinese Society for Environmental Science. He was Chinese delegate to UNFCCC Climate Talks and the sessions of UN sustainable development events e.g. Rio+20 from 2008 to 2016.
His current research focuses on strategy and pathway of carbon peak and neutrality, with special interests in region, enterprise and value chains. Prof. Zhang is now expert member of “national carbon peak and carbon neutralization standardization general group”. Prof. Zhang led various strategic policy researches and was involved in coordinated several governmental strategy drafting, including Technology Roadmap for Carbon Capture, Utilization and Storage of China (2011), National S&T Plan for Climate Change of the 12th FYP (2011), The Specific S&T development Plan for Carbon Capture, Utilization and Storage in China (2012) and China’s 3rd and 4th National Assessment Report on Climate Change (2015,2020), National Climate Adaptation Strategy2035 (2021), Instruments for NDC implementation.