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.

Richard Taylor discusses linkages between rainfall extremes related to ENSO and episodic groundwater recharge, and how amplification of rainfall extremes under climate change may increase groundwater resources in Sub-Saharan Africa.

Paul Bauman discusses the use of geophysics to improve groundwater development in (semi)arid and underserviced regions in Sub-Saharan Africa. He trains communities and applies these approaches to increase access to water resources in refugee camps and villages.

Megan Konar talks about linkages between global food trade and climate extremes (droughts and floods) and groundwater over-exploitation. The future outlook for food security seems good as the global complex food trade network is inherently stable. The transcript for this episode is available on the official Water Resources Website.