Allocating transmissivities from constant head tests for the development of DFN models

Constant head tests are commonly used for field measurements of fracture transmissivity. As a bulk transmissivity is measured each test section, it frequently unclear how this relates to the hydraulic properties individual fractures. The goal study determine if constant conducted at scales larger than average spacing can be generate discrete network (DFN) models that describe transport. methodology involved generating DFNs using from lengths both above and below site in Ontario, Canada. Transport predictions produced different were compared method proportioning larger-scale results obtain DFN representative smaller-scale could established. indicate choice apportion transmissivities has significant impact on transport simulations, with difference mass arrival over factor two travel distances less 50 m. While most appropriate case specific, error resulting needs considered when models.