When we mention the above ground pool, most people will think about the swimming pool. Ok, the answer is yes, but not exactly correct.
The above ground pool is an open top tank, mostly for water storage(water stock), the shape can be circle or square. Not only for swimming, also for fish faring, wastewater treatment storage, rainwater collection, firefighting water supply, and emergency water storage.
Actually, this type of tank pool uses in any sites when you need it for the water storage and the tank opens top.