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Woods Hole Coastal and Marine Science Center > Coastal Model Applications and Field Measurements > Research Activities > Assistance to National Park Service Submerged Resources Center

Coastal Model Applications and Field Measurements

Assistance to National Park Service Submerged Resources Center

We have provided technical advice to marine archaeologists at the NPS Submerged Resources Center as they develop a plan to protect and preserve the wreck of the HMS Fowey in Key Biscayne National Park. We analyzed near-bottom current measurements recorded by NPS staff and analyzed hindcast wave model runs to estimate the frequency of sediment movement at the site. The results are contained in a National Park Service internal report (Keller et al., 2014).

Keller, J. A. 2014. Biscayne National Park HMS Fowey Pre-Stabilization Report. Submerged Resources Center Technical Report No. 33. National Park Service, U. S. Dept. of Interior, Lakewood, CO. 67 pp.

 

Graph of bottom stress estimates

Cumulative distribution of wave-current combined bottom stress (blue dots) estimated from acoustic Doppler current-meter measurements at the wreck site, plotted in log-probability coordinates. The dashed red line represents a Gaussian distribution. The inset table lists the (approximate) frequency of exceedence (percent with smaller diameters) for grain diameters (mm) and associated critical shear stresses (τcrit). The data indicate that bottom stresses are below the critical shear stress (τcrit) for mobilizing carbonate fine sands with diameters of 0.15 mm about 84% of the time, and are below the critical shear stress for mobilizing the median grain size (1-mm granules) 99.5% of the time. No stresses were calculated that were capable of moving the coarsest 35% of bottom sediment.

Underwater photo of divers

NPS archaeologists survey the wreck of the HMS Fowey.
Photo credit: National Park Service.

 

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