Shoreline Electrical Resistivity Tomography (ERT) and Frequency Domain Electromagnetic (FDEM) Data along the Sinclair Inlet at the Bremerton Naval Complex, WA, June 2023

This data release contains electrical resistivity tomography (ERT) and frequency domain electromagnetic (FDEM) data collected in areas of unwalled shoreline at the Bremerton Naval Complex, WA, June 1-5, 2023. Preliminary inverse results from the FDEM data area also included. Two sites were investigated: Charleston Beach and Segment 4. Charleston Beach is a gently sloping pebble beach adjacent to the naval complex; whereas Segment 4 is a steeply sloping section of rocky shoreline on the naval complex surrounded by a pier and naval complex infrastructure. At Charleston Beach, FDEM data were collected with two different instruments with different sensitivity patterns (a DualEM-421 and a GEM-2) during negative tide (less than the mean low tide level) on June 2,2023. At Segment 4, various time-lapse ERT configurations were tested during June 3-5 over tidal cycles, while FDEM datasets (GEM-2 only) were collected during negative tides over this period. To facilitate comparison of geophysical data with tides, tide elevation predictions from NOAA station 9445958 are included in this release. A local digital elevation model was also created for Segment 4 using a real time kinematic (RTK) global positioning system.