{"id":"https://openalex.org/keywords/tracer-testing","display_name":"tracer tests","description":"Hydrogeological tests that introduce or monitor a detectable substance to investigate groundwater flow paths, transport, and aquifer properties.","display_name_alternatives":["groundwater tracer tests","hydrogeological tracer tests","groundwater tracer testing","tracer test","tracer testing"],"ids":{"openalex":"https://openalex.org/keywords/tracer-testing","wikidata":null},"primary_topic":{"id":"https://openalex.org/T10894","display_name":"Groundwater flow and contamination studies","score":0.2877,"subfield":{"id":"https://openalex.org/subfields/2305","display_name":"Environmental Engineering"},"field":{"id":"https://openalex.org/fields/23","display_name":"Environmental Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},"topics":[{"id":"https://openalex.org/T10894","display_name":"Groundwater flow and contamination studies","score":0.2877,"subfield":{"id":"https://openalex.org/subfields/2305","display_name":"Environmental Engineering"},"field":{"id":"https://openalex.org/fields/23","display_name":"Environmental Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T12083","display_name":"Karst Systems and Hydrogeology","score":0.0854,"subfield":{"id":"https://openalex.org/subfields/1904","display_name":"Earth-Surface Processes"},"field":{"id":"https://openalex.org/fields/19","display_name":"Earth and Planetary Sciences"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"works_count":6332,"cited_by_count":82528,"works_api_url":"https://api.openalex.org/works?filter=keywords.id:keywords/tracer-testing","updated_date":"2026-10-22T04:07:25","created_date":"2026-09-30T00:00:00"}
