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Paper Information

Journal:   GEOGRAPHICAL RESEARCH   Spring 2003 , Volume 18 , Number 1 (68); Page(s) 101 To 113.


Author(s):  Rezai p.*
* Rasht Islamic Azad University

Sefidrood valley has made the air changes possible between northern part of the country and the plateau of Iran. In this valley Manjil wind blowing from the north to the south in a year long period affects other regions. Using the statistical data drawn from the Manjil Meteorological station, wide fluctuations of such a current can be detected regarding the speed of the wind. In other words, throughout the year, even in the hot season,significantly various speed range can be observed. It means that in the hot weather period of the year (from April till the end of September) the speed of the wind is increasing to some extent and consequently it has a remarkable effect on the residents, comfort in the region, plant cover, apparent changes on the earth, and specially on the sediment behind the Manjil dam, etc. In comparison, the direction of the wind that blows from the north to the south has a meaningfully stable process.

At first, the author tried to survey the changes that occurred in the blowing area and then analyzes the periods of blowing.

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