Efficiency comparison of ESAs and IMDPA models in evaluation and mapping of desertification status (a case study in Boushehr Province, SW Iran)
Journal Title: Scientific Journal of Environmental Sciences - Year 2014, Vol 3, Issue 6
Abstract
Desertification is the consequence of processes in which climate change and human activities are the most effective factors in arid and semi-arid regions, especially in a major part of Iran. The present study aims to quantitatively assess the desertification situation based on ESAs (Environment Sensitive Areas to Desertification) and IMDPA (Iranian Model of Desertification Potential Assessment) models in southwest of Iran. IMPDA model considers five indicators such as climate, soil, vegetation, erosion, water resources as main coefficients to evaluate the desertification situation. ESAs model takes the physical environment and land management characteristics such as soil, vegetation, climate, and land management for classification of desertification intensity. These layers were extracted and manipulated from the available topographic map data, geologic map, satellite image, and field survey data analyses. Spatial analyst function in ArcGIS software was used for matching the thematic layers and assessing the desertification index, of which the map of environmentally sensitive areas of study area is produced. Based on the results obtained from the IMDPA model, %49.11 of the study area is classified as severe desertification class, and %49.89 in moderate class, and quantitative value of desertification intensity for whole the study area was obtained as [1]DSI =1.55 that is indicative of average desertification intensity in the region. Based on the results obtained from ESAs method, %3.87 of the study area is classified as the fragile class (F2), %38.78 in the average critical (C2) and also nearly %56.42 in the severe critical class (C3). The comparison results show that the IMDPA model have better performances in evaluation current desertification status from ESAs model in Iran. By noticing the evaluated factors, it is understandable that the climate factor has the intensive effect on desertification throughout the study region that they are out of control by human being.
Authors and Affiliations
F. Bahreini, F. Fakhri
Keywords
Related Articles
- EP ID EP1310
- DOI 10.14196/ sjes.v3i6.1746
- Views 457
- Downloads 34
Efficiency comparison of ESAs and IMDPA models in evaluation and mapping of desertification status (a case study in Boushehr Province, SW Iran)
Desertification is the consequence of processes in which climate change and human activities are the most effective factors in arid and semi-arid regions, especially in a major part of Iran. The present study aims to qua...
In situ yields in primary productivity of sand mine ponds of the Otamiri River in a southeastern city of Nigeria
In situ yields inprimary productivity of sand mine ponds of the Otamiri River in Owerri,southeastern Nigeria was investigated during the wet and dry seasons of2012/2013. Eighteen sampling points designated as WC 1-WC 18...
The role of green energy systems and sustainable development
People are relying upon oil for primary energy and this will continue for a few more decades. Other conventional sources may be more enduring, but are not without serious disadvantages. The renewable energy resources are...
Survey efficiency of dairy wastewater treatment by combined chemical coagulation and fenton oxidation process
A large amount of wastewater is produced in the dairy industry. This effluents creates major environmental problems when discharged to surface water. The combined chemical coagulation and Fenton oxidation process was app...
Biosorption of acid blue 113 dyes using dried Lemna minor biomass
Industrial wastewater is one of the major environmental pollutants. Discharge of the colorful industrial waste into the receptive waters leads to eutrophication and has mutagenic and carcinogenic properties. Therefore, t...