That cove is a living spreadsheet in disguise. The sand lines shift like rows of data, each crest and trough a tiny entry. If you capture the timing, the depth and the color of the grains, you can fit a curve and predict erosion like a weather model. Tourists add a noise factor—more footsteps, more sand, more disturbance. I’d set up a small camera rig, log every wave and footstep, then run a simple regression. It won’t be perfect, but it’ll give you a baseline and show where the numbers drift. Just remember: the tide’s a bit of a trickster; don’t let the data lull you into complacency.