Hydrogeology Investigations in the Moanalua and Pearl Harbor Hydrologic Units of the Honolulu Aquife
Abstract
We propose to undertake a sequence of hydrological, geochemical, geophysical, and petrophysical surveys in the region of the Navys,Red Hill Bulk Fuel Storage Facility. The investigations include: borehole measurements of groundwater flow velocity and direction; d,esign and execution of a tracer test; detailed analysis of the distribution of naturally occurring isotope and ion tracer concentrat,ions; marine-based electrical surveys to assess groundwater discharge into Pearl Harbor downgradient of the Red Hill Facility; land-,based electrical, seismic, and gravity surveys to characterize the major geological structures (e.g. alluvial valley fill and saprol,ite, intrusive lavas, diatremes, etc.) that are likely to impact groundwater, fuel, and contaminant flow through the vadose one as w,ell as within the onshore saturated zone; petrophysical studies of the interaction between relevant hydrocarbon fuels (JP-8, Marine,Diesel) and basalt morphologies including weathered pahoehoe, aa clinker, and massive aa core lavas; we will use electrical soundi,ng methods to identify and map confined saturated zones within the vadose zone in both the basalts as well as in the alluvial and sa,prolite wedges present in the valleys flanking Red Hill Ridge. These data, along with the results of a detailed evaluation of cores,recovered from multiple wells in the region will be integrated into a more detailed conceptual site model that will, in turn, be use,d to inform the development of a numerical groundwater model that will describe groundwater flow rates and directions under both non,-pumping and pumping conditions. The ultimate goal of this effort will be to provide the Navy with a groundwater flow model that can, be used to estimate the risk of contamination posed by a release from the Red Hill Bulk Fuel Storage Facility to surrounding source,s of drinking water and to develop plans for minimizing those risks and mitigating potential impacts on the groundwater resource in,the region.APPROVEDFOR PUBLIC RELEASE
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- May 16, 2022
- Source ID
- N000142212403
Entities
People
- Vassilis Syrmos
Organizations
- Office of Naval Research
- United States Navy
- University of Hawaiʻi System