Frederick D Day-Lewis

Fred Day-Lewis is the Acting Chief and a Research Hydrologist with the Hydrogeophysics Branch of the USGS Water Resources Mission Area Earth System Processes Division. Fred provides leadership to USGS hydrologists nationally on hydrogeophysical methods, and conducts researach on groundwater/surface-water interaction and fractured-rock hydrology. 

Biography

Fed Day-Lewis, Ph.D., is Research Hydrologist with the Hydrogeophysics Branch of the USGS Water Resources Mission Area Earth System Processes Division. Fred provides leadership to USGS hydrologists nationally on development and application of hydrogeophysical methods to USGS groundwater studies through applied research, training, and technology transfer.  

Fred is also currently Acting Chief of the Hydrogeophysics Branch, providing oversight and guidance on the Branch’s applied research, technical support, and technology transfer programs utilizing borehole, surface, waterborne, and airborne geophysical methods for USGS groundwater studies. 

Fred conducts applied research on characterization, monitoring, and understanding of hydrologic processes, with current emphases on groundwater/surface-water interactions and fractured rock. Recent activities include studies to improve understanding of hyporheic zone processes and measurement of properties controlling contaminant storage in geologic materials through the application of electrical resistivity and distributed temperature sensing methods. As part of this work, Fred also develops software for improved analysis and visualization of related data (1DTempPro, DTSGUI, FLASH-R). 

As part of his technology transfer work, Fred collaborates with state and federal partners including SERDP, ESTCP, DOE, EPA, and others to support informed decision making on the selection and application of hydrogeophysical tools and methods. Fred also develops decision support tools (SEER, FRGT-MST) to help practitioners and environmental site managers identify near-surface geophysical methods appropriate for a given project’s goals and site conditions.