Dr. Gates specializes in hydraulic and water resources systems engineering. He has taught academic courses in open-channel flow, fluid mechanics, hydraulic engineering, hydraulic structures/systems, hydrology, groundwater engineering, and solid dynamics. His research has focused on analysis, design and operation of open-channel flow systems; stochastic simulation and optimization of water resources systems; modeling and analysis of shallow groundwater systems; management of water quality (especially salt and selenium); drainage of salinity-affected regions; river water quality modeling; multi-objective river basin planning; and monitoring and evaluation of irrigation and drainage systems.