Through an iterative process, we are creating and improving hydrologic models for the Hualālai and Pearl Harbor aquifers. Beginning with simplified conceptual models, we will incorporate more details as new field information becomes available. Ultimately, models will include such factors as density dependent flow, transient conditions, preferential flow, and chemical transport processes. The models will be used in addressing research and management questions.

Geophysical modeling efforts focus on simulations of various techniques (including magnetotellurics, seismics, and electrical resistivity tomography) for different hydrogeological models of the Hualālai and Pearl Harbor aquifers. Initial modeling has guided aspects of field data acquisition, like optimizing the numbers of instrument receivers, their distribution, and the optimal frequency content for targets of interest. Geophysical simulations also improve understanding of data sensitivity to subsurface features that might be encountered. Once field data is acquired, modeling and inversion of the results should help define the actual subsurface aquifer structures.