Lower Mesopotamia Lower Mesopotamia Lower Mesopotamia is a historical region of Iraq. Also known as the Sawad and al-'Irāq al-'Arabi ("Arabian Irāq") in the Middle Ages. Lower Mesopotamia was home to ancient Sumerian and Babylonian civilisations. An alluvial plain begins north of Baghdad and extends to the Persian Gulf. Here the Tigris and Euphrates rivers lie above the level of the plain in many places, and the whole area is a river delta interlaced by the channels of the two rivers and by irrigation canals. Intermittent lakes, fed by the rivers in flood, also characterize southeastern Iraq. A fairly large area ()
Early Dynastic Period (Mesopotamia) as local exchange and production centres but do not seem to have been capitals of larger political entities. The further development of maritime trade in the Persian Gulf led to increased contacts between Lower Mesopotamia and other regions. Starting in the previous period, the area of modern-day Oman—known in ancient texts as Magan—had seen the development of the oasis settlement system. This system relied on irrigation agriculture in areas with perennial springs. Magan owed its good position in the trade network to its copper deposits. These deposits were located in the mountains, notably near Hili, where copper workshops and monumental