1980s girl children's movie
Hi.. I used to rent this cartoon movie when I was very young over and over again.. but can't remember much.. There is a main girl who has some sort of powers.. there may be other girls or boys who have powers too but I mainly remember her.. and the main thing I remember is for some reason she has to either damn up a river so the people can have water or un-damn a river so they can have water.. I'm not sure. I think she can fly.. I don't know.. If anyone can help that would be great. :D I would also like to hear of any good movies from the late 70s early 80s.. ones like The last unicorn.. I love older movies. Thanks!