Dixiedreg,
Wouldn't it be better to say you are working on a documentary of Negril's Beach? Many factors have contributed to the ever changing appearance of this famous, well loved beach. Is it a foregone conclusion that the beach has eroded, or continues to erode, or is increasingly eroding? This may or may not be the case, but your research should quantify what has been happening over the last two or three decades. Good luck with your project! It will be of great interest to many.