Petra Döll discusses the evolution of global hydrologic modeling, especially WaterGAP, as well as transdisciplinary knowledge integration in participatory processes in water and risk management.

Francois Bertone and Lucy Lytton discuss the recent World Bank report on The Hidden Wealth of Nations, The Economics of Groundwater in Times of Climate Change.

Laurence Gill assesses the importance of groundwater in rural Ireland, fingerprinting pollution sources from agriculture and humans, and using music to translate water flow in karst systems

Michelle van Vliet discusses regional and global surface water quality, how water quality affects water scarcity, and potential solutions based on wastewater reuse and seawater desalination.

Robert Mace discusses groundwater sustainability issues, considering long-term evolution of different aquifers (Ogallala, Edwards, Trinity) with implications for future management.

Günter Blöschl discusses recent flooding in Europe, causes of flooding, including climate change and land use change, engineering and nature-based solutions to reduce flood risk, and social hydrology aspects.

Mike Dettinger discusses the origin and evolution of atmospheric rivers and their importance in managing reservoir storage in the Southwest US.

Bill Alley discusses groundwater scarcity issues in Arizona and California, evolving approaches to groundwater governance, and proposed solutions through conjunctive management of surface water and groundwater, managed aquifer recharge, wastewater reuse and desalination.

Mohammad Shamsudduha (Shams) discusses the Bengal Water Machine, where seasonal groundwater depletion from irrigation creates space for increased recharge during summer monsoons in Bangladesh, capturing up to 90 km3 over 30 years.

Karen Villholth discusses importance of groundwater in achieving the United Nations Sustainable Development Goals related to water and food security with particular emphasis in Sub-Saharan Africa.