讲座简介：

Hydrology in the 20th century had long been described as the “forgotten earth science,” yet in the Anthropocene in the 21st century, it has emerged as a critical discipline for understanding the coupled dynamics of climate, water, and society. This seminar traces the evolution of global hydrology over the past four decades, from early atmospheric water balance studies and river-routing models to today‘s integrated simulations of the global terrestrial water cycle that explicitly account for human activities. Drawing on pioneering work that links scientific discovery with policy and practice, the talk highlights the advances in large-scale hydrological modelling, the inclusion of reservoirs and water withdrawals, and the development of social–ecological system approaches to water resources. It also examines how satellite observations, global data sharing, and community-driven “big data” hydrology have transformed our capacity to monitor, predict, and adapt to climate-driven changes in floods, droughts, and water scarcity. The seminar argues that current hydrology cycle is no longer about a "pristine" natural cycle; rather, it must be understood as an integrated human–earth system science essential for sustainable development. By reflecting on these milestones and ongoing challenges, the presentation underscores the urgent need for collaborative, interdisciplinary approaches to secure water and resilience in the Anthropocene.

主讲人简介：

Professor Taikan Oki, from the University of Tokyo (UoT), is a leading global expert in hydrology and the sustainability of world water resources, and currently serves as a Special Advisor to the President and Professor at the Graduate School of Engineering at UoT.

He received his PhD in Civil Engineering at The University of Tokyo in 1993. His areas of expertise are global hydrology, world water resources, climate change, and sustainable development including the virtual water trade and water footprint, and to date he has published over 600 international articles with H-index 90. He was one of the coordinating lead authors for “Freshwater Resources” of the IPCC WGII AR5, and a review editor for “Poverty, Livelihoods and Sustainable Development” of IPCC WGII AR6. He is the first Japanese AGU Fellow in its Hydrology Section “For interdisciplinary research and leadership bridging hydrology, climate, and sustainability through numerical modelling and scientific analysis.” He became a full member of the Club of Rome and the Science Council of Japan since October 2020, and he was the President of the Japan Society for Hydrology and Water Resources (2022-24). He has been the recipient of several esteemed awards such as the Japan Academy Medal in 2008, the Biwako Prize for Ecology in 2011, the International Hydrology Prize (Dooge medal) in 2021, John Dalton Medal (EGU) in 2023, Medal with Purple Ribbon from the government of Japan in 2024, and the Stockholm Water Prize in 2024. He was also affiliated as the Senior Vice-Rector, United Nations University, and an Assistant Secretary-General, United Nations for 2016-2021.

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