Definition characters description and diffusion
Heaps and alignments of stone or earth, often shaped like a half moon, intercept the natural flow of water and allow it to be absorbed into the ground.
General characters description and diffusion
The technique used on a large scale in Karst landscapes or in areas subject to periodic flooding in the Shael (Mali, Niger, and Senegal) and China allows you to recover vast agricultural area, otherwise subject to erosion.
Advantages and sustainability
Recovery of land and prevention of erosion is achieved through the use of protective lunettes which allow for absorption of water into the ground.