The Dynamics of Sand Dunes and Their Impact on the Capability of Soil in El-Qasr Village, El-Dakhla Depression: A Study in Applied Geomorphology

El-Qasr Village is considered one of the villages of El-Dakhla Depression that are most affected by sand dunes, which are characterized by continuous dynamic activity, particularly with the increase in human intervention represented, in turn, in the increase in the areas of cultivated lands. This change has a significant role in affecting its soil mechanically and chemically. This has been tracked by studying the movement rates of sand dunes, and their morphometric and morphological characteristics, as well as the factors affecting them, whether physical or human, which led to a decrease in their numbers and area. Furthermore, the study monitors the agricultural expansion along with the correlation between the dynamics of sand dunes and cultivated lands, which was reflected on their characteristics and capability, using the Land Evaluation program. Accordingly, suitable means were identified so as to increase its capability, and choose the best crops that are suitable for cultivation and that have a significant economic return in the region.