سال انتشار: ۱۳۸۶

محل انتشار: سمینار بین المللی تاریخ آبیاری و زهکشی

تعداد صفحات: ۸

نویسنده(ها):

Navid Basseri – Faculty of Iranian Research Organization of Science and Technology, Tehran
Kaveh Bijad – A.K.S. Consulting Engineer
Farid Ghassemlou – History of Science Dept. Encyclopedia Islamic Foundation ,Tehran

چکیده:

During the short period of Ghazan khan’s government, the seventh king of Ilkhanid Empire (1293-1303 A.C.). There were some efforts to improve economic and social condition under Ilkhanid’s government. These adjustments and revision actions were in the follow of slump, declining economy and decadence which happened after Mongol attack to Iran. After the destruction of economic infrastructure and massacre of Iranians
and during the first wave of attacks, in trace with that menace society by starvation and epidemic disease. In this time Ghazan khan begun his adjustments and correction of tax flow. For this purpose he started to lease the land for long time period. This method named Siorghal. He tried to equalize unit and weight measuring system. It is also amazing that in this time, paper money issued this happen for first time in the world
after publishing in china. Another infrastructure task of Ghazan khan was improvement of agriculture condition. He ordered to repair irrigation channels. This channels ruin after attack of Mongol to Iran and set aside because of poor maintenance and bad management. In category of repair and development of channels, one set is Parchi channels and their network. These channel located in Azarbaijan in North West of Iran
at Ghotur River. The length of Parchi is about 30 kilometers and their duty are convey and provide water for irrigated land under these channels that estimated to be about 3500 hectares. In compare with today scales, design and build and maintain such a long channel is important by any way structure and maintain. This set is a great task in view point of engineering. In this article, after a short report from Ghazan khandjustments
in repairing and managing of channel and Qanats, authors will introduce Parchi channel and present the hydraulic characteristics of it. There will be also a glance to Khoy and its history.