Project Description:
As coastal development continues, boat wakes are being introduced both in greater frequency and magnitude and into areas that would otherwise rarely experience wind-generated wave energy. Our intention is to complete development of a tool, which we are calling the Boat Wake Energy Model (BoMo), to forecast wave energy distribution arising from such wakes in order to then understand the impact or assess damage of natural resources and plan mitigative strategies. BoMo will be a sophisticated boat wake generator and wake propagator model that computes wave energy, wave height and wave period generated by the small boats and ships in a geographic format. The wave energy is a function of boat hull length, hull shape, beam, displacement, boat velocity and bathymetry. Wave energy will be computed for both planing and displacement hulls and over complex bathymetry and shoreline geometry. BoMo will be divided into two main modules, a wake generator module to generate the boat wake and wave propagator module to propagate the wake generated to the shoreline. Because these entries interface with the bathymetry and shoreline in a Geographic Information System (GIS), the user also will have an option to select the path along which boat is sailing. The wake generator module provides output as a georeferenced map of wave height, wave period and wave heading. The wave propagation module includes the shareware REFDIF1, a nonlinear, combined refraction/diffraction model. Values of wave height and wave energy will be provided as outputs at the grid nodes in form of a text file, and various georeferenced map products.
Expected Outcome:
Adapt the University of Delaware REFDIF1 (refraction-diffraction) model to accept boat wake input in a GIS format. Produce a series of hull type x speed x water depth = wave height calibration curves. Develop, test and add a neural network component to input wave characteristics to REFDIF (or its equivalent) based on vessel type, speed and size. Integrate these computations into a GUI targeting the skill levels of resource managers. Nominate this product for a technology transfer award.
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