Desertification vulnerability in Varamin Plain (Central of Iran)

Desertification vulnerability in Varamin Plain, Central of Iran

Results and Discussion
The results have been showed in 1 to 3 figures, and fig 4 shows the ESA map.

Figure 1. Map of GroundWater Index

Figure 2. Map of Land Use Index

Figure 3.Map of Soil Quality Index

Figure 4. Map of ESA Index
The map of ESA index shows that in the central part of plain and along the northeastern it, there isn't any risk of desertification. But in the south western and in the limited area in southeastern the risk of desertification is high. And the others part of plain the risk of desertification is low to high. The results shows that from the total area of plain about 58 134 ha is in the Absent class, 33 578 ha is in the low class, 31 665 ha is in the medium class and about 7 812 ha is in the high class and about 2859 ha is not classified, because these places are city, Village or water body.

With attention to the above results, although in 1 class the risk of desertification is low but the management in these lands are very necessary and important because these lands are generally of rangeland and also agricultural (the fallow is the most) and may be in affect of mismanagement, change to medium class. And in the south of plain that are medium to high classes, generally have drainage problems and also salinization; therefore we should be restrain of desertification speed with the soil improvement and others planning in these lands.

References

Basso F.,Belloti A., Faretta S., Ferrara A., Mancino G., Pisante M., Quaranta G., Tabemer M. (1999). The Agri Basin. In: the MEDALUS Project- Mediterranean Desertification and Land Use. Manual on Key indicators of desertification and mapping Environmentally Sensitive Areas to desertification. C. Kosmas, M. Kirkby and N. Geeson (eds) EUR 18882.
Giordano L., F. Giordano., S.Grauso, M. Iannetta, M. Sciortino, G. Bonnati, F. Borfecchia,L.De Cecco, F. Felici,S.Martini, G. Schino. Desertification Vulnerability in Sicily (Southern Italy). Proc. Of the 2nd Int. Conf. On New Trend in Water and Environmental Engineering for Safety and Life: Eco-compatible solutions for Aquatic Environments, Capri, Italy, June 24-28, 2002.
Ldisa G., M.Todorovic, G. Trisorio-liuzzi. Characterization of Areas Sensitive to Desertification in Southern Italy, Proc. Of the 2nd Int. Conf. On New Trend in Water and Environmental Engineering for Safety and Life: Eco-compatible solutions for Aquatic Environments, Capri, Italy, June 24-28, 2002.
Rafiei Emam A., Investigation of Varamin plain desertification with attention of soil and water. M.Sc thesis, University of Tehran, Iran, 2002.
Rafiei Emam A., Assessment of Groundwater and its Relation to Desertification. Proc. Of the 2nd Int. Conf. On Environmentally Sustainable Agriculture for Dry Areas, Shijiazhang City, P.R.China. Sept. 15-19, 2002.

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