{"thcode":3,"term":{"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]"},"uf":[{"name":"canal bends","usewith":false},{"name":"canalized streams","usewith":false},{"name":"ditch mouths","usewith":false},{"name":"ditches","usewith":false},{"name":"drainage canals","usewith":false},{"name":"drainage ditches","usewith":false},{"name":"drains (channels)","usewith":false},{"name":"flumes (manmade)","usewith":false},{"name":"irrigation canals","usewith":false},{"name":"irrigation ditches","usewith":false},{"name":"irrigation systems","usewith":false},{"name":"laterals","usewith":false},{"name":"navigation canals","usewith":false},{"name":"underground irrigation canals","usewith":false}],"bt":[{"code":526,"name":"hydrographic structures","parent":643,"scope":"For constructed bodies of water. For natural water bodies, use 'hydrographic features'."},{"code":643,"name":"manmade features","parent":1,"scope":null},{"code":1,"name":"Categories","parent":null,"scope":null}],"nt":[],"rt":[{"code":47,"name":"aqueducts","parent":1174,"scope":"Structures designed to transport water from a remote source, usually by gravity. [USGS Circ 1048]"},{"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":630,"name":"locks","parent":1174,"scope":"Stretches of water in canals, streams, or docks, enclosed by gates at each end, and used in raising and lowering boats as they pass from one water level to another. [Glossary of Geology, 4th ed.]"},{"code":1174,"name":"transportation features","parent":643,"scope":null},{"code":1185,"name":"tunnels","parent":1174,"scope":"Underground or underwater passages. [USGS Circ 1048]"}]}