Tigris–Euphrates river system through the central plain and combine at Al-Qurnah to form the Shatt al-Arab and discharge into the Persian Gulf. The region has historical importance as part of the Fertile Crescent region, in which civilization is believed to have first emerged. The ecoregion is characterized by two large rivers, the Tigris and Euphrates. The rivers have several small tributaries which feed into the system from shallow freshwater lakes, swamps, and marshes, all surrounded by desert. The hydrology of these vast marshes is extremely important to the ecology of the entire upper Persian Gulf. Historically, the area is known as Mesopotamia. As
Watching the River Flow reviews; Dylan's next album that year, "New Morning", was viewed much more favorably by critics, and Ralph Gleason declared "We've got Dylan back again!" For Heylin, Dylan's assertion in the song that he does not have any particular message to express, is an attempt to subvert critics like Gleason. Heylin wrote that both "Watching the River Flow" and "When I Paint My Masterpiece" discuss Dylan's professed lack of inspiration at the time in an honest and satisfying way. Pointing to the fact that Dylan made no attempt to record either a single or an album in the following year of