Monitoring the Movement of Sand Dunes in Thi Qar Governorate Using Some Spectral Indices

As purpose of monitoring the dunes changes in Thi Qar Governorate, using remote sensing and geographic information systemsIt has been selected to install the dunes station in Al-Fajr, The study area is located between longitudes 45 ? 49'30 "and 45 ? 53'30" east and latitudes 31 ? 41'00 "and 31 ? 44'30" north of the study area, and an area of 1693.08 hectares, for the purpose of the follow-up to the temporal variation dunes.Three satellite visuals for continued US-made Land Sat been selected for different kinds of sensors TM, ETM + and OLI and the years 1993.2002, and 2015. Respectively. Satellite image processing was visually and digitally conducted by radiation and spatial enhancements also removed distortions and deducted the study area. Some of the indices used as indicators to determine the spectral variation in three years selected, The NDVI and the soil bare index BSI and land degradation indexLDI were identified, the proportion of variation in the index between different years were also measured to determine the percentage of variation between each year and to see the dunes movement during the study period, and to outputs the final maps required.The study showed an increase in the bare land compared with vegetation, Sand dunes movement was observed by 45 m / year.