Assessment of Land Degradation and Droughts in an Arid Area Using Drought Indices, Modified Soil-Adjusted Vegetation Index and Landsat Remote Sensing Data

Ain Sefra is part of the Ksour Mountains and it's situated in southwestern Algeria, where climate arid. The study area progressively facing regression degradation exacerbated by change. These trends point to a significant acceleration desertification drought loss production systems that play critical social, ecological, economic role region. To better understand natural hazard dryness impact change, we used various indices remote sensing data. Hence, analyzing precipitation records from 1965 2021, through several indices, droughts were identified as recurring phenomenon. Moreover, frequency successive dry years relatively high. There three most extended continuous periods. first phase lasted seven 1980 1987, second twelve 1994 2006, third nine 2012 2021. Calculation Modified Soil-Adjusted Vegetation Index (MSAVI) for five multidate satellite images allowed us follow evolution land use elements this region 1977 2017. Indeed, these multi-temporal reveals considerable growth sands, moving towards north northeast zone during last decades. combination seems be promising; whose results are valuable tools guidance decision support local regional authorities.