{"thcode":3,"term":{"code":525,"name":"hydrographic features","parent":1,"scope":"For natural bodies of water. For constructed waterways, reservoirs, and such, use 'hydrographic structures'."},"uf":[{"name":"bodies of water","usewith":false},{"name":"eddies","usewith":false},{"name":"fluvial features","usewith":false},{"name":"marine features","usewith":false},{"name":"overfalls","usewith":false},{"name":"upwellings","usewith":false},{"name":"water bodies","usewith":false},{"name":"waterholes","usewith":false},{"name":"whirlpools","usewith":false}],"bt":[{"code":1,"name":"Categories","parent":null,"scope":null}],"nt":[{"code":48,"name":"aquifers","parent":525,"scope":"Bodies of rock that contain sufficient saturated permeable material to conduct ground water and to yield significant quantities of water to  wells and springs. [Glossary of Geology, 4th ed.]"},{"code":100,"name":"bays","parent":525,"scope":"Indentations of a coastline or shoreline enclosing a part of a body of water; bodies of water partly surrounded by land. [USGS GNIS Feature Class Definitions <http:\/\/geonames.usgs.gov\/domestic\/feature_class.htm>]"},{"code":189,"name":"channels","parent":525,"scope":"(a) Relatively narrow seas or stretches of water between two close landmasses and connecting two larger bodies of water; (b) Deeper parts of a moving body of water (as bays, estuaries, or straits) through which the main current flows or which affords the best passage through an area otherwise too shallow to navigate. [Glossary of Geology, 4th ed.]"},{"code":331,"name":"drainage basins","parent":525,"scope":"Regions or areas bounded by drainage divides and occupied by drainage systems; specifically the tract of country that gathers water originating as precipitation and contributes it to a particular stream channel or system of channels, or to a lake, reservoir, or other body of water. [Glossary of Geology, 4th ed.]"},{"code":361,"name":"estuaries","parent":525,"scope":"Regions of interaction between rivers and near-shore ocean waters, where tidal action and river flow mix fresh and salt water. These brackish water ecosystems shelter and feed marine life, birds, and wildlife.. [EPA Terms of Environment < http:\/\/www.epa.gov\/OCEPAterms\/>]"},{"code":401,"name":"floodplains","parent":525,"scope":"Flat or nearly flat land along a river or stream or in a tidal area that is covered by water during a flood. [EPA Terms of Environment <http:\/\/www.epa.gov\/OCEPAterms\/>]"},{"code":473,"name":"gulfs","parent":525,"scope":"Largest of various forms of inlets of the sea; usually larger, more enclosed, and more deeply indented than bays. [Glossary of Geology, 4th ed.]"},{"code":476,"name":"guts","parent":525,"scope":"Relatively small coastal waterways connecting larger bodies of water or other waterways. [USGS Feature Class Definitions <http:\/\/geonames.usgs.gov\/domestic\/feature_class.htm>]"},{"code":529,"name":"ice masses","parent":525,"scope":"Fields of ice, formed in regions of perennial frost. [USGS Circ 1048]"},{"code":596,"name":"lakes","parent":525,"scope":"Natural inland bodies of standing water, generally of appreciable size, occupying a depression in the Earth's surface. [Adapted from Glossary of Geology, 4th ed.]"},{"code":1015,"name":"seas","parent":525,"scope":"Large bodies of salt water. [USGS Feature Class Definitions <http:\/\/geonames.usgs.gov\/domestic\/feature_class.htm>]"},{"code":1096,"name":"streams","parent":525,"scope":"Linear bodies of water flowing on the Earth's surface. [USGS Feature Class Definitions <http:\/\/geonames.usgs.gov\/domestic\/feature_class.htm>]"},{"code":1149,"name":"thermal features","parent":525,"scope":"Holes in the Earth's crust from which hot water and steam (geysers), and gases and vapors (fumaroles) are emitted. [Adapted from USGS Circ 1048 and Glossary of Geology, 4th ed.]"}],"rt":[{"code":526,"name":"hydrographic structures","parent":643,"scope":"For constructed bodies of water. For natural water bodies, use 'hydrographic features'."},{"code":747,"name":"oases","parent":112,"scope":"Fertile, vegetated areas in the midst of a desert, where the water table has come close enough to the surface for wells and springs or seepages to exist, thus making them suitable for human habitation. [Glossary of Geology, 4th ed.]"}]}