The latter part of the string likely refers to the , one of the world's largest underground water reservoirs.
The song was written by Walter Malgoni (whose name seems to be hybridized in your query as "elgosmalgoni"). guarda_che_luna_elgosmalgoni_aguas_argentinas
While "Aguas Argentinas" was a specific private company that formerly managed water services in Buenos Aires, the broader term refers to the vital water resources shared between Argentina, Brazil, Paraguay, and Uruguay. The latter part of the string likely refers