Calibration of IMDPA model with regarding to land criteria to present regional model for desertification intensity (Case study: Abuzaidabad, Kashan)

Document Type : Research Paper

Authors

1 Assistant Professor, Faculty of Natural Resources, University of Tehran, Tehran, Iran

2 Professor, Science and Research Branch, Islamic Azad University, Tehran, Iran

3 Professor of Natural Resources, University of Tehran, Tehran, Iran

4 Professor, Faculty of Soil Science, University of Tehran, Tehran, Iran

5 Graduated in Rangeland Silences, Faculty of Natural Resources, University of Tehran, Tehran, Iran

Abstract

Desertification is specific phenomenon of arid, semi-arid, dry sub humid regions. This phenomenon has a high rate in developing countries such as Iran. The main objective of this research was calibration of IMDPA model in Abuzeidabad (Kashan) region with emphasis on land criteria. IMDPA model, introduced by Iranian researchers to assess desertification intensity in Iran. Before application, the criteria and indices applied in model were re-defined For this study. Regarding to region conditions three criteria were defined as key criteria for desertification which were: Geology-geomorphology, soil and wind erosion criteria. Then each criterion was assessed based on selected criteria, which resulted in qualitative mapping of each criterion based on selected criteria. Finally, by mean of all the indices and criteria desertification mapping was provided and these results obtained. Regarding the studied criteria, Geology– Geomorphology benchmark has the highest effect on desertification. Among the total studying are (16161 hectars), the medium class is about (4792 hectars), and the high class is about (11369 hectars). Among indicators, slop index with 3.9 and lithology sensitivity to erosion and wind erosion with the value of 3.5 and 3.4 are the main indexes of increase in desertification intensity in the study area. According to map of desertification statue 70.3% of study area have a high intensity and 29.7% have a medium intensity.

Keywords


Volume 66, Issue 3 - Serial Number 3
November 2013
Pages 469-476
  • Receive Date: 13 December 2008
  • Revise Date: 12 November 2013
  • Accept Date: 26 April 2010
  • First Publish Date: 23 October 2013