Tigris–Euphrates river system border. Since the 1960s and in the 1970s, when Turkey began the GAP project in earnest, water disputes have regularly occurred in addition to the associated dam's effects on the environment. In addition, Syrian and Iranian dam construction has also contributed to political tension within the basin, particularly during drought. The general climate of the region is subtropical, hot and arid. At the northern end of the Persian Gulf is the vast floodplain of the Euphrates, Tigris, and Karun Rivers, featuring huge permanent lakes, marshes, and forest. The aquatic vegetation includes reeds, rushes, and papyrus, which support numerous species. Areas
Euphrates Tunnel Euphrates Tunnel The Euphrates Tunnel was allegedly a tunnel which was built under the Euphrates river to connect the two halves of the city of Babylon, in the old Mesopotamia. Archaeologists believe it was built between 2180 and 2160 BCE. No other sub-aqueous pedestrian tunnel was attempted until Marc Brunel built the Thames Tunnel beginning in 1824 CE. Construction allegedly began with a temporary dam across the Euphrates river, and proceeded using a "cut and cover" technique. The tunnel allegedly spanned 12 feet high and 15 feet wide, it is presumed that it was used by pedestrians and horse driven