title: Gjersjøen
text: # Gjersjøen
  
  Gjersjøen is a lake in the municipalities Oppegård and Ås in Akershus county, Norway. It has a surface area of 2.6 $km^2$ (1.0 sq mi), and is 40 m above sea level. The lake drains through Gjersjøelva to Bunnefjorden.
  
  