William, what the many water are is defined in Revelation 17:15 And he saith unto me, The waters which thou sawest, where the whore sitteth, are peoples, and multitudes, and nations, and tongues.Search internet: "Bible many waters Babylon."
Babylon was known as "city on many waters." Water supply was an issue in Biblical times, and Babylon had an ingenious canal system, hence "many waters" (17:1). This drew many people, since water is somewhat limited in the Middle East.