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Paper Information

Journal:   IRANIAN JOURNAL OF RANGE AND DESERT RESEARCH   2005 , Volume 12 , Number 1 (18); Page(s) 21 To 39.
 
Paper: 

STUDY ON THE FEASIBILITY OF EROSIVE WIND DIRECTIONS DETERMINATION USING STORM TRACING ON SATELLITE IMAGES

 
 
Author(s):  ARAB KHEDRI M.*, IRANMANESH FAZEL
 
* SOIL CONSERVATION AND WATERSHED MANAGEMENT RESEARCH CENTER, TEHRAN, IRAN
 
Abstract: 
Systan plain is located in the east of Iran and has the fastest dust storms in the world. Existence of suitable water resources has caused dense population in comparing with other regions in Iran with high wind erosion features; so more investigation was needed in this area. Distinguishing the erosive wind directions is the first step in wind erosion control projects, which usually determined by wind data analysis, field work and aerial photo interpretation. In recent years progression in remote sensing technology raised new possibility to use especially high resolution Satellite images like aerial photos for this purpose. But multiplicity of MODIS images could be used as an advantage for storm tracing. So in this research we have used 4 MODIS images from June to August in 2001 for determining the average storm direction in 18 locations and compared with 17 observations on sand dunes and also wind direction in Zabol synoptic station. The results show that there are good agreements among storm directions on images with other observations. Nevertheless we showed 10-31 degrees deviation among these two groups of data near villages and agricultural fields, which demonstrate the effect of buildings, wind breaks and other barriers on deviation of general wind direction. We also showed 5-23 degrees differences range among storm direction in different images which assert wind direction change by time. So it is necessary to use more than one image for getting an average.
 
Keyword(s): WIND DIRECTION, WIND DATA, FIELD OBSERVATIONS, STORM TRACING, MODIS SATELLITE IMAGES
 
References: 
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