{"thcode":2,"term":{"code":2275,"name":"acid-base accounting","parent":189,"scope":"An analytical procedure that provides values to help assess the acid-producing and acid-neutralizing potential of overburden rocks prior to coal mining and other large-scale excavations."},"uf":[],"bt":[{"code":189,"name":"computational methods","parent":734,"scope":"Mathematical techniques used to analyze numerical data."},{"code":734,"name":"methods","parent":1,"scope":"Techniques, methods, procedures, or strategies for research, management, collection, or analysis of scientific information in USGS."},{"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":2276,"name":"acid neutralizing potential","parent":1367,"scope":"Geochemical capacity of earth materials to affect the pH of waters flowing through them."},{"code":1724,"name":"mine drainage","parent":1723,"scope":"Introduction of harmful substances into the environment from mines and tailings."}]}