Investigating and evaluating the spatial changes of wind erosion in the southwestern margin of Ptergan playa (Zirkouh city, South Khorasan province)
Subject Areas : landusemaryam rabiei gask 1 , mahdi saghafi 2 , Mohamad Motamedirad 3
1 - Assistant Professor, Department of Geography Education, Farhangian University, Tehran, Iran. *(Corresponding Author)
2 - Associate Professor, department of Geography Education, payame Noor university, Tehran, Iran.
3 - Assistant Professor, Department of Geography Education, Farhangian University, Tehran, Iran.
Keywords: assessment, spatial changes, wind erosion, Ptergan playa. ,
Abstract :
Background and Objectives: Wind erosion is one of the major environmental issues Currently, the lands affected by wind erosion reach more than 5.05 million square kilometers. Although wind erosion is not a new challenge. But it has recently been recognized as one of the main sources of environmental threats worldwide.in Iran More than one million square kilometers, equivalent to 64.66% of the country's area, are covered by arid and semi-arid areas. Of these sand dunes in approxIt covers 130,000 square kilometers of the country's desert basin, of which more than 50,000 square kilometers include active and inactive sand dunes.in this It covers 130,000 square kilometers of the country's desert basin, of which more than 50,000 square kilometers include active and inactive sand dunes.
Material and Methodology: in this A study using the Erifer intensity method of different areas of the region. The study is in the area of the eastern border of the country and in the outer slopes of the mountains of the eastern border. The country that is located under the territory of one of the most important playas of Iran (Petergan playa) has been investigated.
Findings: The purpose of this review is also to check efficiency Erifer's method is used to estimate wind erosion potential in this part of our country. Based on the results of high and very high erosion classes including about 55 percent, they have allocated the most area. The medium and low erosion class is ranked second with 38.2% of the region. The average amount of wind erosion in the region was calculated to be 25.17 tons per hectare per year.
Discussion and Conclusion: According to the field data and its compliance with the results of the model It was observed that the results of the model had a high compliance with the real data and provided acceptable results.
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