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:: Volume 17, Issue 59 (12-2017) ::
جغرافیایی 2017, 17(59): 165-185 Back to browse issues page
Estimation of variation rate of wind erosion zones based on the IRIFR model and land use and landcover extraction model by using Landsat satellite images (case study: Mazhan district, South Khorasan province)
Mahdi Saghafi * 1, Abolfazl Rahmani2
1- Payame Noor University
2- Hakim Sabzevari University
Abstract:   (6300 Views)

The estimated surface area affected by human-induced soil degradation is 24 percent of the inhabited land areas. A major impact of desertification is loss of biodiversity and loss of capacity of land is known as desertification. Desertifications permanently, but not exclusively occur in arid regions. Mazhan district of Birjand city have agriculture and livestock activities, including areas affected by severe wind erosion in the South Khorasan province. Average annual rainfall in the district during a 20 year period equal to 154 mm and are generally dry and desert climate. The aim of this study was to investigate the variability of wind erosion zones specified period using Landsat satellite images. Wind erosion models are used for a variety of purposes including estimating consequences of wind erosion, as well as for designing erosion control measures. For applying wind erosion model, one has to clearly define the objective of assessment and also to check if required data for running the model is available. In this paper, combining data from two models: the model of wind erosion IRIFR zoning and land use land cover classification using satellite images is done. Finally, multivariate statistical method of principal component analysis, the spatial and temporal variability of wind erosion zone is studied. The results indicate the highest rate of occurrence of wind erosion in areas of moderate intensity on the geomorphologically alluvial fans. The first principal component, which contains 98.89% of the variation in the areas of wind erosion is the best representative of the area during the period under consideration.

Keywords: variation Rate, Wind Erosion Zones, IRIFR model, Landuse and Landcover, LANDSAT Satalait images, Mazhan district
Full-Text [PDF 2630 kb]   (1302 Downloads)    
Type of Study: Research | Subject: Special
Received: 2015/04/10 | Accepted: 2016/01/6 | Published: 2017/12/10
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Saghafi M, Rahmani A. Estimation of variation rate of wind erosion zones based on the IRIFR model and land use and landcover extraction model by using Landsat satellite images (case study: Mazhan district, South Khorasan province). جغرافیایی 2017; 17 (59) :165-185
URL: http://geographical-space.iau-ahar.ac.ir/article-1-1607-en.html


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Volume 17, Issue 59 (12-2017) Back to browse issues page
فضای جغرافیایی Geographic Space
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