I do not know your lay-out around your property.
I would put the ducky pool in the center, where all sections meet.
Put your fence/barrier around the ducky pool with a 3-4 feet space or more between your ducky pool and fence.
Now you could have 4 gates that lead to the 4 sections from the pool which could be opend for the section you want to be used.
This way you could have one set up with your pump and filter system without having to move things around.
Johann, would love to set up a paddock situation like that or something similar.
I'm a bit restricted on space though as I'm operating on a small residential lot of only 1/3rd of an acre and the house happens to be sitting smack in the middle of it. The "chicken coop" happens to be an old dog kennel that was already on the corner of the property and the duck pond and duck river are between that coop and the house along one edge of the property. I re-arrange my electric net fencing to give the birds access to different areas of the property at different times of the year depending on where I have my gardens and what I need to leave open for different reasons. Seems to work well enough when all I have is about 10 adult birds total (chickens and adult ducks) however when the population is up for one reason or another it gets a bit noisy and they tend to take down all the extra vegetation.