Where does “antitrasvase” come from?

antitrasvase (Spanish) comes from Spanish trasvase, from Spanish trasvasar, from Spanish tras-, from Latin trāns, from Latin Padus, from Lepontic Bodincus, from Proto-Indo-European bʰudʰmḗn, from Proto-Indo-European dʰewbʰ- — smoke; mist, haze.

antitrasvase (Spanish): opposing the creation of a transbasin diversion