Hydrogeologists currently have a variety of methods for subsurface characterization at their disposal, each providing a different type of information at a different support scale. The growing diversity and availability of site characterization data has prompted research on the joint inversion of these data and their incorporation into aquifer models. This session invites presentations on the use of multiple methods of subsurface characterization, their joint inversion, and their incorporation into numerical and analytical models of groundwater flow and transport. Presentation topics may include (1) field or laboratory experiments collecting multiple data types; (2) optimization of experimental designs for multi-method testing; (3) joint inversion / interpretation of multiple tests and data types while accounting for their support scale; and (4) methods for incorporating multiple types of site characterization data into subsequent flow and transport models. This session welcomes papers that touch on all aspects of the joint use of multiple types of site characterization data in the inference, upscaling, and modeling of aquifers, including case studies.