The entire course of the Dizful stream to this point is probably not less than 380 miles.

Below Bandi-kir, the Kuran, now become "a noble river, exceeding in size the Tigris and Euphrates," meanders across the plain in a general direction of S.S.
W., past the towns of Uris, Ahwaz, and Ismaili, to Sablah, when it turns more to the west, and passing Mohammerah, empties itself into the Shat-el-Arab, about 22 miles below Busra.

The entire course of the Kuran from its most remote source, exclusive of the lesser windings, is not less than 430 miles.
The Kerkhah (anciently the Choaspes) is formed by three streams of almost equal magnitude, all of them rising in the most eastern portion of the Zagros range.

The central of the three flows from the southern flank of Mount Elwand (Orontes), the mountain behind Hamadan (Ecbatana), and receives on the right, after a course of about thirty miles, the northern or Singur branch, and ten miles further on the southern or Guran branch, which is known by the name of the Gamas-ab.

The river thus formed flows westward to Behistun, after which it bonds to the south-west, and then to the south, receiving tributaries on both hands, and winding among the mountains as far as the ruined city of Rudbar.
Here it bursts through the outer barrier of the great range, and, receiving the large stream of the Kirrind from the north-west, flows S.S.E.and S.E.along the foot of the range, between it and the Kebir Kuh, till it meets the stream of the Abi-Zal, when it finally leaves the hills and flows through the plain, pursuing a S.S.E.direction to the ruins of Susa, which lie upon its left bank, and then turning to the S.S.