Took me a while (and a number of reads) to decipher what you had to say there Buster.
I have been trying to source some satellite images of the area with regards to sand movement in that area over the last 30 or so years (without luck). Even in the time that I have been associated with the area (the last 18 years), it has been amazing how much change has occurred to the pond and surrounding land.
From what I understand, at one stage that spit of land was a small sand island and the water flowed between it and the sailing club, plus the sailing club was a lot closer to the water.
I would love to know where it is going to end up (or is it) as it morphs. There is the adjacent sand bar that sits below the water (obviously tide dependent) at around the 1-2 foot mark underwater that the current sand bar is moving towards. Maybe there is some sand movement prediction algorithm out there that has mapped what is going to happen.
Having SUP paddled that area the other day, it has that boat harbour feel to it, in that the water doesn't seem to flush that well from within the pond, it probably also doesn't help that there is the large pipe that feeds road run-off and the like into it.
It is certainly is an interesting "living" land mass, in comparison to other Perth beach areas that seem to be a lot more stable with regards to sand movement.