What happens in halakha when a border moves: can artificially redirecting the Jordan change the sanctity of the land?

This source-based Torah study examines: What happens in halakha when a border moves: can artificially redirecting the Jordan change the sanctity of the land? It follows the canonical Hebrew discussion and the classical sources cited there, preserving the distinctions and review status of the original. This localized layer is for study and discovery only; it is not practical halakhic, legal, medical, safety or pastoral advice.