mohsen hosseinkhani; akbar fakhire; alireza shahriari; ahmad pahlavanravi; soheila noori
Abstract
In this research using GIS effect of land management and soil criteria with eight indicators to study the sensitivity to the desert lands of the region of Sistan jazinak creation is evaluated. Vote based on the model parameters wilderness - the latest creation ESAs evaluation method wilderness creation ...
Read More
In this research using GIS effect of land management and soil criteria with eight indicators to study the sensitivity to the desert lands of the region of Sistan jazinak creation is evaluated. Vote based on the model parameters wilderness - the latest creation ESAs evaluation method wilderness creation and in most European countries and the Middle East is used, took place. Using the above method each of the indicators studied work unit was evaluated for each index layer was prepared by the information obtained data compiled GIS environment and desired criteria for each layer made of information was. Ultimately determine the geometric mean combining and intelligence layer criteria examined in the study area based on the model (ESAs), the intensity map obtained desert region creation. Based on the results obtained from the map 8/15 percent low fragile Brigade were part of the 20/08 percent Brigade fragile among moderate, 26/80 percent high-intensity part of the fragile type and 39/45 percent of the area Critical moderate intensity is too much Measure of the numerical value of the soil with 1/22 and the least impact with the numerical value of land management measures 1/72 greatest impact in the desert region has creation. Among the indicators two indicators, respectively, slope and soil texture with a numerical value, and 1/03 and the two lowest impact indicator pebbles and operations management, respectively, with the numerical value of 1/91 and 1/84 Desert greatest impact on morbidity region are considered.
s.h Parvari Asl1; ahmad Pahlavanravi; ali reza Moghaddam Nia
Volume 63, Issue 2 , September 2010, , Pages 149-16
Abstract
Desertification is the consequence of series of processes in which climate change and human activities are more important factors than others. Arid and semi-arid areas have occupied most parts of Iran. Sistan region is one of arid areas of Iran where wind erosion is an important factor of land degradation ...
Read More
Desertification is the consequence of series of processes in which climate change and human activities are more important factors than others. Arid and semi-arid areas have occupied most parts of Iran. Sistan region is one of arid areas of Iran where wind erosion is an important factor of land degradation and soil deterioration. For classification of desertification intensity, several methods have been proposed so far. ESAs Model is on of the best and recent methodologies introduced by the European Commission in 1999 and evaluated by most of European as well as Middle Eastern countries. ESAs has more advantageous than other methods because of its accuracy, particular weighing of layers, use of geographical information systems in overlaying of maps, use of geometric mean over arithmetic one or sum in computing indices and final desertification map. The method was chosen to monitor desertification in the study area. The factors which affect on desertification were evaluated based on the related tables. According to the conditions of the study area, it was found that four factors including vegetation cover, soil, climate and land use management are the most important desertification factors. The results showed that climate play vital role in land degradation and desertification. Based on the results of it is found that the study area has critical conditions. It includes high critical (C3), moderate critical (C2) and low critical (C1) classes of desertification which cover 68%, less than 1% and 31% of the region, respectively.
