{"thcode":2,"term":{"code":1125,"name":"surface water quality","parent":1306,"scope":"Chemical, physical, and biological characteristics of water in lakes, rivers, or streams related to its fitness for use."},"uf":[],"bt":[{"code":1306,"name":"water quality","parent":1174,"scope":"The chemical, physical, and biological characteristics of water, usually in respect to its suitability for a particular purpose."},{"code":1174,"name":"topics","parent":1,"scope":"Themes, subjects, and concerns for which USGS information resources are relevant."},{"code":1,"name":"Categories","parent":null,"scope":"Thematic terms for categorizing information resources.  This thesaurus is intended to support finding and understanding scientific information."}],"nt":[],"rt":[{"code":560,"name":"hydrology","parent":291,"scope":"Branch of earth science that deals with water as it occurs in the atmosphere, on the surface of the ground, and underground."},{"code":657,"name":"limnology","parent":291,"scope":"Scientific study of the physical and biological characteristics of inland bodies of water such as lakes and ponds."},{"code":1124,"name":"surface water (non-marine)","parent":1308,"scope":"Open bodies of water, such as lakes, rivers, or streams.  All non-marine waters on the  surface of the earth, including fresh, brackish, and salt water."},{"code":1298,"name":"water chemistry","parent":437,"scope":"Branch of chemistry that deals with the elements and compounds in water."}]}