It's something that happens from time to time ...... and then the sand comes back. Watch your own stretch of beach for a year and make the big decisions on management afterwards. Each area has different currents so what works for one area might be the wrong thing for another. A very gentle (and often effective) effort that can be tried now (and tweaked over time) is to get medium size rocks (6"-8" across) and place them parallel to the beach, about 5-10 feet out from the shorline. I've seen it work wonders in several areas - it takes a couple of months, but the sand that is loosened tends to get caught and doesn't travel elsewhere. another suggestion is a 5-10 foot line of rocks (doesn't have to be more than one course high) perpendicular to the shoreline down-current from the waves.