Kamp, Norbert-Riberolle, Nys, Van Anrooij new world champions in junior and U23 races.
Van der Poel rode clear in opening minute of the race to defend rainbow jersey, Pidcock took second, Aerts third.
Alvarado tops an all-Dutch podium to take emotional win, Compton finishes fourth after long solo chase.
Munro takes third while teammate Gonsalus places eighth in strong performance from the U.S. team.
Bill Schieken of CXHAIRS Media previews the course for this weekend's UCI Cyclocross World Championships in Dübendorf, Switzerland.
With van der Poel back on top form after a late start to the 'cross season, van Aert feels the world championships may come down to a race for second-place.
Alvarado lost her World Cup lead in final-lap crash, Aerts secures overall with second-place in the race.
Fayetteville, Arkansas to host 2020 Pan-American 'cross championships on the site of the 2022 World Championships
Van Aert optimistic about return to form after five months out of racing, plans further 'cross races to sharpen legs for spring classics.
Athletes to compete in February's event in Switzerland include national champions Gage Hecht, Clara Honsinger and favorite for the inaugural junior women's event, Madigan Munro.