exorheic lake; open lake
A lake that drains into a river or the ocean, as opposed to a closed basin. Technical term used in geography and hydrology; the antonym is 無口湖 (endorheic lake).
See also: 無口湖
Lake Biwa is an example of an exorheic lake.
An exorheic lake is a lake whose water eventually flows out to the sea.
Compound of 有 (yū, 'having') + 口 (kō, 'mouth, outlet') + 湖 (ko, 'lake'), literally 'lake with an outlet'. The term is a technical coinage in geography.