Generating Policy Recommendations for Sustainable Water Use in Complex Scenarios: An Agent-Based Model Addressing Temporal and Spatial Interaction, Heterogeneity, and Uncertainty in Monroe County, Michigan Moira Zellner Urban Planning Water is an essential resource for all human activities, from the basic physiological needs to industrial and agricultural production. As populations have grown, however, water allocation has become increasingly problematic. Controversies have arisen due to the uncertainty in the dynamics of surface and groundwater systems, the difficulty restricting access to the systems, the associated land use processes, and the multiple layers of decision-making and scales of interest. Generating appropriate policies for water management is elusive in such scenarios, but policy-making may be improved through the use of analytical frameworks that explicitly address the complexities of water systems. This dissertation will develop a model that will serve as such a framework to better understand the causes of conflict in water allocation and to test the effectiveness of various policies in securing long-term water availability in Monroe County, Michigan, whose dropping groundwater levels have raised considerable concern.