The changes in land cover in southwest Romania could affect the low frequency cycle of precipitation regime through changes in ground water stress and atmospheric circulation. Monitoring these changes using satellite images has been proved less expensive, as well as more reliable compared to conventional methods. The 50 ha of walnuts plantation, which were meant to strengthen the dunes in the area, have been deforested since 2013. This analysis to detect the deforestation was done using GIS, ENVI and ERDAS software and the method was made based on NDVI. The entire study was made with Landsat remote sensing imagery, choosing the month July. The change is quantified via spectral (image) or thematic (characterization) contrast. The percentage of vegetation losses after deforestation was 85.7%.