Water resources policy and management, with focus on negotiated decision making, the role of science in policy and decisions, groundwater recharge and recovery, sustainability and growth, and climate change. Susanna collaborates on development and implementation of research and outreach programs with relevance to Arizona water resource policy and management. She manages and conducts applied research projects and dissemination of research results. She oversees development of the WRRC's regular publication and edits the quarterly newsletter, Arizona Water Resource.