limnology

The scientific study of the life and phenomena of fresh water, especially lakes and ponds.

The scientific study of lakes and ponds, with especial reference to the organisms which live in them.

the scientific study of bodies of fresh water for their biological and physical and geological properties.

The science concerning the biological, physical and geological properties of fresh water bodies, especially lakes and ponds.

the scientific study of bodies of fresh water for their biological and physical and geological properties