Three-dimensional hydraulic tomography analyses to investigate commingling issues of reproducibility, data density, and geological prior models

•HT surveys in 2019 and 2020 to test the reproducibility of estimated K and Ss.•3D K and Ss fields are reproducible even when boundary conditions are varied.•Improved reproducibility observed when inverting with higher data density.•Accurate geological information included as initial guess improved reproducibility.•HT has the potential for mapping changes in K and Ss heterogeneity over time.