" something is fishy in the state of universal . " 
about ten years back , with the unexpected success of mad max and the road warrior , post-apocalypse nitty-gritty survival yarns became popular at the movies . 
we've always had movies of this nature ; on the beach , the end of the world , damnation alley , the ultimate warrior , and so on . 
to date , the most smoothly done were straightforward " haircuts " of the classic western plot , like the lone gunman who comes to town and protects the widow and the son against an evil organization , usually one in possession of some critical resource , like water , feed range , or a mining claim . 
most of these grew out of venerable , but solid hero yarns like the virginian and shane . 
 ( my personal favorite is a patrick swayze movie called steel dawn , which was fairly well made on a small budget . ) 
now we have waterworld , which again brings the traditional lone gunman to town to rescue the young widow and her daughter . 
 ( well , she's not a widow , and the kid isn't her daughter , but you get the idea . ) 
the lady is helen , played by the stunning jean tripplehorn , who isn't given a chance to be stunning , or even interesting , by the mediocre and unimaginative script . 
the child enola , played by tina majorino , is living proof that a child actor need not be a bad thing to have in a movie ; she outshines her material all the way through . 
in simple , the scene is earth , hundreds of years from now . 
the polar ice caps have melted , and somehow produced enough water to inundate the entire planet . 
the few remaining people live in boats and floating colonies , and survive by trade , theft , or piracy . 
somehow an oil tanker has survived the centuries , and its inhabitants , called " smokers , " are able to keep gasoline engines running despite the dearth of replacement parts and raw materials , so the bad guys have outboard engines , and fast-moving boats , airplanes , and jet skis . 
enola , found at sea as a young girl , has a mysterious map no one can read tattooed on her back . 
we suspect early on that it is the way to the mythical " dryland , " the place where trees , crops , and animals grow , and what plot there is hinges on who has enola . 
the psycho ruler of the smokers , the " deacon , " is trying to get her and find his way to dryland . 
played with typical self-lampooning , rug-chewing histrionics by dennis hopper , " deacon " is the only thing in the movie that's close to amusing . 
his performance is * almost * laughable , but there just isn't enough there to be funny . 
the star ( and a co-producer ) is kevin costner . 
he's playing an un-named lone denizen of the sea , a man called the " mariner , " who turns out to be a gilled , water-breathing mutant with webbed feet . 
very little is done with this . 
the script ignores the ineffectuality of gills in supplying enough oxygen to support a human metabolism ; it ignores the fact that even with both ice caps completely melted , much of the earth's surface would still be above water ; and it ignores the blatant impossibility of the cultures and technology shown . 
 ( canned meat does * not * last for centuries ; ammunition does * not * fire after it's more than a few decades old ; and so on , and so on . . . ) 
i'm quite fond of tina majorino's previous work , very impressed by jean tripplehorn's past accomplishments , and still speechless over costner's dances with wolves . 
but this movie could destroy the careers of anyone associated with it ! 
this movie cost one hundred and eighty-two million dollars , and there's * nothing * in it we haven't seen before , done better on only a few percent of the cost of this turkey . 
at 125 minutes of material , this movie cost over one point four million dollars per minute to make . 
the budget of this movie * could * have given us over thirty movies ; it could have paid for six years of a prime-time sf tv series with expensive fx work , or ten years of an sf tv series with good digital fx . 
in sum , this movie is beneath contempt . 
it has nothing new to offer , it has a script that could easily have been bettered by the people who write comic books for dc , and it spent more money than the national budget of a small nation . 
if you * have * to go see it , see it on a four-dollar matinee . 
otherwise you'll find yourself sneering at you every time you pass a reflective surface , for weeks .