This arm is named the Haffar, and at the confluence is situated the Persian town of Muhamrah, a place most conveniently located for trade.
Of land have been formed by the silting up of the shore since the foundation of Spasinus Charax (Muhamrah) in the time of Alexander the Great, or some 115 ft.
MUHAMRAH (MOHAMMERAH), a town of Persia, in the province of Arabistan, in 30 26' N., 48° II' E., on the Hafar canal, which joins the Karun with the Shatt el Arab, and flows into the latter 40 m.
With the opening of the Karun river, as far as Ahvaz, to international navigation in 1889, Muhamrah acquired greater importance, and its customs, which until then were leased to the governor for 150o per annum, rose considerably, and paid 8000 until taken over by the central customs department under Belgian officials in 1902.
It is estimated that the value of the imports and exports into and from Muhamrah, excluding specie, is about £300,000 per annum, paying customs amounting to about £18,000.
Of the treaty of Erzerum, Muhamrah was alternately claimed and occupied by Persia and Turkey, its ruler, an Arab sheikh, helping either power as he found it convenient.
At the close of the Anglo-Persian campaign in 1857 Muhamrah was taken by a British force.
Commerce.The principal centres of commerce are Tabriz, Teheran, Resht, Meshed and Yezd; the principal, ports Bander Abbasi, Lingah, Bushire and Muhamrah on the Persian Gulf, and Astara, Enzeli, Meshed i Sar and Bander i Gez on the Caspian.
The following figures from the commercial statistics published by the Persian Customs Department show the total shipping at the four principal Persian Gulf ports, Bushire, Bander Lingah, Bander Abbasi and Muhamrah during the years 1904-1907.
On the 5th of April, at Muhamrah, Sir James Outram received the news that the treaty of peace had been signed in Paris, where Lord Cowley and Farrukh Khan had conducted the negotiations.
When the steamers were ready to do the work they had been intended for, the farmer, or farmers, of the Gulf customs raised difficulties and objected to pay the cost of maintaining the Persepolis; the governor of Muhamrah would not allow any interference with what he considered his hereditary rights of the shipping monopoly on the Karun, and the objects for which the steamers had been brought were not attained.