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Drought mapping using geoinformation technology for some sites in the Iraqi Kurdistan region

International Journal of Digital Earth 2011年第3期4卷 239-257页

作者： Ayad Mohammed Fadhil Soil and Water Science Department Agriculture CollegeSalahaddin University-HawlerKurdistan RegionIraq

Iraq has suffered severely from drought in recent years and the year 2008 was the driest,particularly in the Iraqi Kurdistan *** study incorporated geoinformation technology into mapping the drought that severely affected the Kurdistan region in the years 2007*** technology provides support in the theories,methods and techniques for building,and development of Digital Earth *** vegetation,soil,water,and land surface temperature(LST)indices were applied to two Landsat 7 ETMimageries of June 2007 and June 2008,to assess the drought impacts in Erbil governorate Kurdistan during the study *** indices that were employed in this study were Normalized Difference Vegetation Index,Bare Soil Index,Normalized Differential Water Index,Tasseled Cap Transformation Wetness,and *** results revealed a significant decrease in the vegetative cover(56.7%)and a decline in soil/vegetation wetness(29.9%)of the total study ***,there was a significant reduction in the water bodies surface area in the region such as Dokan Lake,which lost 32.5%of its surface area in comparison with the previous year,*** study results showed that the soil moisture content was the most effective actor on the vegetative cover,LST,and drought status in the study area.

关键词： geoinformation technology Digital Earth Landsat-7 ETM+ drought Iraqi Kurdistan region

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