Sand dunes movement

I took specific sample of landscape which I found near the city of Timbuktu. This city suffers as much as other sub-saharan city from desertification. Wind is moving masses of sand from the north east toward the city. I found satellite images showing this area between years 2003 and 2013. Based on this images I analyzed the movement of sand in my chosen area.

Overlaid map is showing the movement of dunes within 10 years. Arrows are dominant wind courses. White areas represent previous dune positions, yellow lines show direction of movement.

Section through the overlaid landscape