Re: Do you want brown sand dumped on the beach?
Over time (weeks, months) the darker sand will mix in with the whiter sand and the overall color will become darker. That's an unavoidable effect when you bring darker sand anywhere near whiter sand.
Over even more time (years)--if no additional dark sand is brought in--the dark sand will continue mixing and dispersing, it will lighten in color somewhat (not completely) due to sun and tide interaction, and more white sand will be brought in by the tides. Eventually it will not be noticeable, but it will take a very long time.
I'm not particularly happy about using the dark sand. But I'm even less happy about the way the beaches look now.
Over time (weeks, months) the darker sand will mix in with the whiter sand and the overall color will become darker. That's an unavoidable effect when you bring darker sand anywhere near whiter sand.
Over even more time (years)--if no additional dark sand is brought in--the dark sand will continue mixing and dispersing, it will lighten in color somewhat (not completely) due to sun and tide interaction, and more white sand will be brought in by the tides. Eventually it will not be noticeable, but it will take a very long time.
I'm not particularly happy about using the dark sand. But I'm even less happy about the way the beaches look now.