In the Qajar period, as in today's Karoon River, the port of Mohamra (Khorramshahr) connected to Shushtar at the mouth of the Persian Gulf. There, it was connected to other areas through land routes, which was closer to Bushehr-Shiraz-Isfahan to reach the central and northern regions of Iran. Since the 1840s The commercial way of Karoon was taken into consideration by the British in the context of the proper access to the western cities of Iran, especially the Indian and British commercial routes, by the writings of Sir Henry Laayard and Lieberman. Though she was in close proximity to Mohammad Taqi Khan Bakhtiari, he sought to provide the necessary grounds for expanding commerce from Karoun (Lihard, 1376: 55-154), but arresting Khan Bakhtiari in 1258 AH. / 1842 m. Prevented this from happening
Digging the Suez Canal in 1286 AH. / 1869 m. Consideration was given to sea and river routes for the connection between Europe and India and Iran. Local governors of Iran also paid attention to this issue. In 1295 AH. / 1878 m. Hossein Kelli Khan, the first and largest Ilkhani Bakhtiari, co-operated with McKenzie, a partner of Gary, Paul and Partners, who was based in Bushehr, to expand the commercial offer, and the company was ready to launch shipping on this river (Garethwit, 1375: 107 ).
But the arbitrary action and excessive power of Ilkhani Bakhtiari eventually ended in 1299 AH. / 1882 m. He murdered him and prevented the progress of work.
At the same time, the French were able to obtain the exclusive rights of the Karoon shipping and the exploitation of its neighboring land. This award was twice awarded twice between 1293 and 1295 AH. / 1876 and 1878 It was canceled by the influence of Dr Toulousan, the French doctor of the king and the help of the Russians in Tehran, and was set up to rebuild the dam of Ahvaz with valves, irrigate the surrounding land and even exploit forests and mines. (Karzan, 2001: 403; Nategh, 1373: 21-20).
However, the expansion of ties between the Persian Gulf and India, as well as the efforts of British Foreign Minister Darmand Wolf, led Nasser-al-Din Shah to a decree of 24 zero-1306 AH. / October 30, 1888 Express shipping in the southern part of the Karoun River for free to all countries (Karzan, 2001: 404). In this way, Ahwaz was considered by Iranian and foreign businessmen. Under such circumstances, Hossein-gulli Khan-i-al-Saltanah was also appointed to the Khuzestan and Bakhtiari government (the Mafi Saltanaha, 1362: 376/2) to carry out the necessary reforms there.
After gaining this privilege, Brother Lynch, a partner of the Euphrates and Tigris shipping company, who had long been operating the British company Tigris shipping, assigned one of its ships to the Karun River service, and then two weeks The load was launched from Mohamra to Ahwaz (Karzan, 2001: 405). But according to the decree and its related contract, the construction of any building, coal warehouse and goods, shops, caravanserai or workshops and factories in the two banks of the Karun River was banned by this company (Shamim, 2008: 230). In fact, the Karoon River, which had several cliffs in Ahwaz, was divided into two upstream and downstream areas. The Upper or Upper Karun Branch covered Shushtar to Ahwaz and the southern or downstream of Ahwaz to the Persian Gulf. Therefore, the ships that were moving from the Persian Gulf at the site of Ahwaz would inevitably shift their ship to another ship on the north side of the cliff. Since the activities of foreigners were banned in the northern Karun, these were the responsibility of the Iranians; in such a way that Hajj Aqa Muhammad Moin al-Tajar of Bushehr, who enjoyed so much power and influence in the Nasir al-Din Shah's apparatus, could use this position. At 7 th Ramadan 1307 AH. / April 28, 1890 Take the "Nasseri Company" advantage from Nasser-al-Din Shah and "seemingly" at the Karoon Shipping Score (Nategh, 1993: 47).