I reckon water would hit a sandbank with more force on the ocean side so...
I've done a bit of needle pleating to create a band of turbulence.
Then the new band of water asked for some holes like the leeward side.
I refused the holes but...
decided on stitching buttonhole circles to apply over the ripples.
As I wrapped circles of thread around fingers and buttonholed for a few hours,
I thought it might be something like tatting...what do you think Deanne?
Anyhooo, the holey water or sandbar piece is beginning to look like this.