{"thcode":3,"term":{"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.]"},"uf":[{"name":"chutes (hydrographic)","usewith":false},{"name":"cutoffs (hydrographic)","usewith":false},{"name":"inlets","usewith":false},{"name":"lake channels","usewith":false},{"name":"marine channels","usewith":false},{"name":"narrows (hydrographic)","usewith":false},{"name":"navigation channels","usewith":false},{"name":"reaches (hydrographic)","usewith":false},{"name":"sounds (bodies of water)","usewith":false},{"name":"straits","usewith":false}],"bt":[{"code":525,"name":"hydrographic features","parent":1,"scope":"For natural bodies of water. For constructed waterways, reservoirs, and such, use 'hydrographic structures'."},{"code":1,"name":"Categories","parent":null,"scope":null}],"nt":[],"rt":[{"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":164,"name":"canals","parent":526,"scope":"Artificial waterways with no flow or a controlled flow used for navigation (canal), or for draining or irrigating land (ditch). [USGS Circ 1048]"},{"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":960,"name":"rivers","parent":1096,"scope":"Natural freshwater surface streams of considerable volume and a permanent or seasonal flow, moving in a definite channel toward a sea, lake, or another river; any large streams, or ones larger than brooks or creeks, such as the trunk stream and larger branches of a drainage system.  [Glossary of Geology, 4th ed.]"}]}