Abstract
The coupled Delft3D-object model has been developed to predict the mobility and burial of objects on sandy seafloors. The Delft3D model is used to predict seabed environmental factors such as currents, waves (peak wave period, significant wave height, wave direction), water level, sediment transport, and seabed change, which are taken as the forcing term to the object model consisting of three components: (a) physical parameters such as diameter, length, mass, and rolling moment; (b) dynamics of the rolling cylinder around its major axis; (c) an empirical sediment scour model with re-exposure parameterization. The model is compared with the observational data collected from a field experiment from 21 April to 13 May 2013 off the coast of Panama City, Florida. The experimental data contain both object mobility using sector scanning sonars and maintenance divers as well as simultaneous environmental time series data of the boundary layer hydrodynamics and sediment transport conditions. Comparison between modeled and observed data clearly shows the model’s capabilities and limitations.
Highlights
The red boxes denote the objects that were not recovered from the shallow quadpod site
After the storm event on 5–6 May 2013, a maintenance dive was performed in the morning of 8 May 2013 and found that the surrogates and replicas may have been cording to relative bulk density
The Delft3D output data with 1-h resolution are used as input for the object model
Summary
Publisher’s Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations. The object model requires localized environmental parameters such as waves, currents, and sediment transport in order to accurately predict the location, mobility, and burial of underwater munitions. ); (c) an object’s parameters such as diameter (D), relative water (θ opb); (b) a sediment scour model with the sediment Shields parameter density (So ), mass (M), and rolling moment about its symmetric axis (Io ); (d) environmental (θvariables sed); (c) an object’s physical parameters such as diameter (D), relative density versus wasuch as near seabed ocean currents, bottom wave orbital velocity (Ubr ), water ter density (So), mass and moment about its symmetric axis (Io); (d) environdepth (h), wave peak(M), period (a) east-west componentwind and (b)component north-south wind for the study area from the NOAA buoyNOAA (blue curves). 0.25 resolution from the European Centre for Medium-Range Weather Forecasts (ECMWF) (red curves) [19]
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
