S14

Groundwater sustainability in a changing climate: modeling and experimental analyses from urban, agricultural and ecological contexts
Convener: Daniele Pedretti | Co-Conveners: Michelle Newcomer, Barry Croke, Amir AghaKouchak

Groundwater is arguably the most strategic freshwater resource for humans and the biosphere. If properly managed, groundwater can be resilient to climate change, making it a valuable resource to protect and optimize for climate change mitigation plans. Yet, groundwater can be also vulnerable to antropic contamination and naturally a poorly renewable resource, requiring our efforts to ensure its long-term sustainability. This session gathers theoretical and applied studies focusing on groundwater sustainability. The session welcomes experimental and modeling tools and analyses performed from the shallow soils and vadose zone to deeper environmental studies, including fossil aquifers. Among the topics, the session addresses:
• the development and use of modern techniques, such as managed aquifer recharge (MAR);
• the optimization of pumping wells and draining systems;
• the optimization of groundwater-driver irrigation and other agricultural applications;
• the sustainable use of groundwater to save groundwater-dependent ecosystems; including rivers and streams endangered by aquifer overexploitation, and;
• the disturbance of external factors, such as wildfires.
The results and discussions emerging from this session will help disentangling some of the "23 Unsolved Problems in Hydrology", in particular climate-change-driven time variability (questions 1-4), the role of different interfaces in hydrology to control the management of groundwater (questions 12-15) and the impact of groundwater sustainability on the society (questions 21-23).