Alluvion is a noun that refers to the flow of water against a shore. 

Our word of the day comes from the Latin word luere (lou WEAR ay) which means ‘to wash.’ Arriving at our shores in the mid16th century, alluvion soon came to refer specifically to water washing against the shores. Here’s an example:

The alluvion at the beach is a truly breathtaking sight. I could sit back and watch the tide crash into the sand all day long.