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 chariots and connected a major temple with the royal palace on the other shore of the river, it was supposedly lined with brick and waterproofed with asphalt. A description of the tunnel as being built and used by Queen Semiramis is given by Diodorus (fl. 50 BCE) in the "Bibliotheca Historica": Philostratus (d. 250 CE) also describes the tunnel's construction in the "Life of Apollonius of Tyana": 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