Charles has more than 20 years’ experience in water resource management issues. His research focuses on the application of numerical models for analysis of reservoir operations, rainfall-runoff processes, plant growth, and groundwater flow.

Recent projects have included the development of a computer simulation model to study the effects of climate change on crop water use and yield, a combined rainfall-runoff and reservoir operations model of the western slope of the Sierra Nevada in California for analysis of climate change scenarios, and a detailed cottonwood growth model for use in study of California’s Central Valley Project operations to enhance riparian forest regeneration.

His expertise includes model development for river basin planning using the Water Evaluation and Planning (WEAP) system, groundwater modeling, and the ArcGIS geographic information systems software, as well as Visual Basic, Fortran, and Java programming.

He received his Ph.D. in biological and agricultural engineering from the University of California–Davis in 2004.