A variety of windborne debris flight studies have been completed including:

1. Aggregate removal from rooftops (Karimpour & Kaye 2012, Karimpour & Kaye 2013). 
2. Flight modeling of compact debris (Karimpour & Kaye 2012, Kaye 2015) 
3. Rod like debris flight.

We are currently revisiting the problem of gravel flight. Gravel is typically treated as compact debris which implies that its flight will be two-dimensional. However, gravel is irregularly shaped which can lead to lift forces and rotational moments. We are developing a stochastic model for this flight. We have also recently completed full scale gravel removal tests at the FIU Wall of Wind. This data will be used to develop a particle scale motion initiation model for roof gravel blow-off.