How about making a safer place from which to jump? Build three platforms of different jumping heights, one for the novice, one for the intermediate and one for the more daring.
Place them around the pool so nobody’s jumping on top of another and with a safe access way for each spot.
Then people can have their fun or challenge or for whatever reason they want to jump and others can enjoy watching them.
Sure there will be need for some supervision and a lot of young people are going to want to go because they love to jump.
And why should we stop them?