water clarity
41Onondaga Lake — Location Onondaga County, New York, USA Coordinates …
42Chilika Lake — Chilka Lake Fishermen pushing against the tide Coordinates …
43Chesapeake Bay — Coordinates: 36°59′45″N 75°57′34″W / 36.99583°N 75.95944°W / 36.99583; 75.95944 …
44Underwater — is a term describing the realm below the surface of water where the water exists in a natural feature (called a body of water) such as an ocean, sea, lake, pond, or river. Three quarters of the planet Earth is covered by water. A majority of the… …
45Outline of hydrology — The following outline is provided as an overview of and topical guide to hydrology: Hydrology – study of the movement, distribution, and quality of water on Earth and other planets, including the hydrologic cycle, water resources and… …
46Murray cod — Conservation status Critically Endangered  …
47Otter Tail Lake — Otter Tail Lake, at the Otter Tail River inlet Location Otter Tail County, Minnesota, USA Coordinates …
48Lake Apopka — Infobox lake lake name = Lake Apopka image lake = caption lake = image bathymetry = caption bathymetry = location = Florida coords = coord|28|37|14|N|81|37|19|W|region:US FL type:waterbody|display=inline,title type = inflow = outflow = catchment …
49Ultraviolet germicidal irradiation — (UVGI) is a sterilization method that uses ultraviolet (UV) light at sufficiently short wavelength to break down micro organisms. [National Institute for Occupational Safety and Health. (2008, April). NIOSH eNews, 5(12). Retrieved September 10,… …
50Spring creek — This article is about the hydrological feature. See Spring Creek for specific places named Spring Creek. A spring creek is a type of free flowing river whose name derives from its origin: an underground spring or set of springs which produces… …
