Volume 1, Number 1 (2-2013)                   DEEJ 2013, 1(1): 59-71 | Back to browse issues page


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Abstract:  

In order to deal desertification phenomenon it is necessary to identify its producing and
increases causes. For this purpose several studies conducted inside and outside the country
that have been led to submit regional models.. Each of these models has different pattern and
use different indicators which can lead to different results. In this study, Fakhrabad plain of
Mehriz region by extent of over 39,370 hectares was selected. Whit emphasizing wind
erosion criteria, that is the dominant process of desertification in the study area, the current
status of desertification evaluated by IMDPA and MICD Iranian models and the results of
two models ware compared. The results of this evaluation showed that in both IMDPA and
MICD methods, the middle class of desertification has greatest area that is 88/3% and 81/4%
respectively. Comparison of desertification scores and different classes of land use using
regression comparison of standardized values revealed that correlation between the obtained
scores is about 33% while this correlation between the severity classes of current
desertification is 42%. Also comparison of similar values of the corresponding showed that
classes of desertification in IMDPA model is less than MICD model which can be related to
the different nature of models in using of the geometric and the arithmetic sum of the
indices. It can be concluded that MICD model is suitable for large-scale (with more
accuracy& the less area) and IMDPA model is more fitted for smaller scales (with more area,
less accuracy) of capacity.

Type of Study: Research | Subject: Special
Received: 2012/07/31 | Accepted: 2012/12/25 | Published: 2013/02/3

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