{"thcode":2,"term":{"code":353,"name":"erosion","parent":451,"scope":"The process whereby materials of the earth's crust are loosened, dissolved, or worn away and simultaneously moved from one place to another."},"uf":[{"name":"beach erosion","usewith":{"code":1799,"name":"coastal processes","parent":101,"scope":"Processes unique to coastal areas including longshore transport, beach erosion, storm surge, shoreline change, delta formation, barrier island migration, beach stabilization by vegetation"}},{"name":"coastal erosion","usewith":{"code":1799,"name":"coastal processes","parent":101,"scope":"Processes unique to coastal areas including longshore transport, beach erosion, storm surge, shoreline change, delta formation, barrier island migration, beach stabilization by vegetation"}},{"name":"dissolution","usewith":false},{"name":"shoreline erosion","usewith":{"code":1799,"name":"coastal processes","parent":101,"scope":"Processes unique to coastal areas including longshore transport, beach erosion, storm surge, shoreline change, delta formation, barrier island migration, beach stabilization by vegetation"}},{"name":"shoreline retreat","usewith":{"code":1799,"name":"coastal processes","parent":101,"scope":"Processes unique to coastal areas including longshore transport, beach erosion, storm surge, shoreline change, delta formation, barrier island migration, beach stabilization by vegetation"}},{"name":"wind erosion","usewith":{"code":1690,"name":"wind","parent":63,"scope":"Local air movements."}}],"bt":[{"code":451,"name":"geologic processes","parent":101,"scope":"All types of processes involving geological structures."},{"code":101,"name":"biological and physical processes","parent":1174,"scope":"All continuing activities, functions, and phenomena associated with organisms and non-living matter."},{"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":[{"code":1750,"name":"sinkhole formation","parent":353,"scope":"Localized collapse of the land surface usually due to erosion of the underlying materials.  Most commonly occurring in karst areas, but similar effects occur due to physical erosion in other terranes."}],"rt":[{"code":468,"name":"geomorphology","parent":464,"scope":"Branch of geology dealing with surface land features and the processes that create and change them."},{"code":484,"name":"glaciology","parent":291,"scope":"Science dealing with the features, origins, processes, and properties of snow, ice, glaciers, and ice sheets."},{"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":1687,"name":"scour","parent":1667,"scope":"Erosion of sediment in a stream bed, often occurring at manmade structures such as bridge supports."},{"code":1037,"name":"sedimentology","parent":464,"scope":"Branch of earth sciences concerned with the study of the origin, composition, transport, and changes of materials deposited by water, wind, or ice."},{"code":1318,"name":"watershed management","parent":776,"scope":"Controlling and directing the resources and activities associated with the land and streams of a drainage basin to maintain the supply and quality of water and prevent floods, erosions, and other destructive conditions."}]}