The Sunnah in Musaqah

Your Eminence! In the hadith of al-Zubayr regarding the story of the irrigation channels of al-Harra: it is mentioned that he and a man from the Ansar disputed over musaqah, so the Prophet (peace and blessings be upon him) ruled in favor of al-Zubayr that he should water until the land is saturated and the water rises to the walls. However, what we have here, Your Eminence, in the waters of the Barada River in Damascus, is that they are not divided according to this system. Rather, a person who wants to water his land subscribes to a specific number of qirats of land, then he waters it, and it is not required that the land be saturated or not saturated until it is divided among others. Is this division that they follow valid?
By Allah! My brother! I am not a scholar in Syria to clarify whether it is valid and remains, or defective and is annulled. This is referred back to the scholars there. You have now learned the Sunnah, so ask the scholars whether this conforms to the Sunnah or contradicts it?