_:b1218448 . _:b1218448 "A polymictic lake is a holomictic lake which is too shallow to allow thermal stratification and which can mix from top to bottom through the ice-free period of the year."^^ . _:b1218448 "DOI:10.1139/f83-207"^^ . _:b1218448 . _:b1218448 . _:b1218448 "Wikipedia:Polymictic"^^ .