Event Date
More than two billion people and 40% of global agricultural production depend upon unsustainable groundwater extraction. Managed aquifer recharge (MAR), the practice of strategically recharging water to replenish subsurface storage, is an important practice for managing groundwater more sustainably. However, it is not yet reaching its full potential to counterbalance growing global groundwater demand. Agricultural managed aquifer recharge (Ag-MAR) is an emerging method for spreading large volume flows on agricultural lands and has capacity for widespread global implementation. Yet, knowledge gaps, synergies, and trade-offs in Ag-MAR research still exist. In this presentation, we describe the practice and feasibility of using agricultural land as intentional spreading basins for groundwater recharge, the opportunities to address climate change with Ag-MAR, and the benefits of Ag-MAR including groundwater storage, increased environmental flows, and domestic well support. We will present the current state of research with respect to environmental impacts of Ag-MAR on water quality (e.g. nitrate), crop health and yield and the multidisciplinary approach needed for communication and coordination of Ag-MAR programs with stakeholders and the public. In groundwater-dependent agricultural regions, Ag-MAR provides an important approach for achieving groundwater sustainability, however, it provides one of many solutions to achieve groundwater sustainability and cannot offset the need for groundwater conservation.
