Journal of Range and Watershed Managment

Study of desertification status using IMDPA model with emphasis on water and soil criteria (Case study: Khezr Abad - Elah Abad of Yazd - plain)

Document Type : Research Paper

Authors

E. S. Shokoohi 1
Gh. R. Zehtabian 2
A. Tavili 3

1 M.Sc.Graduate, Faculty of Natural Resources, University of Tehran, Karaj, I.R. Iran.

2 Professor, Faculty of Natural Resources, University of Tehran, Karaj, I.R. Iran.

3 Associate Professor, Faculty of Natural Resources, University of Tehran, Karaj, I.R. Iran.

https://doi.org/10.22059/jrwm.2012.32050
Abstract
More than 80% of Iran’s area has arid and semi arid climate. Therefore, Iran is exposed to desertification process. Practical activities in controlling desertification must be based on current desertification situation and its severity. Based on this theory, evaluating desertification rate indices in Khezrabad region was done based on IMDPA model. In this research two factors with 10 indices were investigated. Each of the investigated indices was analyzed and scored based on work units. Data layers of each index were made by Arc GIS software. By compiling data layers and calculating geometric mean of indices, desertification rate map of the region was then prepared. According to the selected indices, final desertification map shows the mean rate of desertification. Soil index by 2.21 scoring value was classified in median class while water index by 1.46 scoring value was classified in poor class. Soil depth had the biggest influence while SAR and Cl of water had the least influence on desertification. Based on the assessments, geometrical mean of desertification rate quantity value for the entire region was 1.76, thus the entire region was classified in median class.

Keywords

Criterion
index
Desertification
IMPDA
Khezrabad-Elah Abad
Journal of Range and Watershed Managment
Volume 65, Issue 4 - Serial Number 4
Winter 2013
Pages 517-528

  • Receive Date 08 June 2011
  • Revise Date 14 July 2013
  • Accept Date 20 February 2013
  • Publish Date 21 December 2012

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