Semicircular ditches
The aim is to dig small, semi-circular pits that retain water. Because of their shape, they are called “earth smiles.” Rainwater that would have previously washed away, eroded and further hardened the surface is retained, water balance is restored and vegetation grows back. Restoring vegetation restores the water cycle. When this is done over a large area, it helps generate clouds, increasing rainfall in the area. This rain benefits vegetation, which continues to improve water tables and desertified lands are transformed into lush, green areas.
The aim is to dig small, semi-circular pits that retain water. Because of their shape, they are called “earth smiles.” Rainwater that would have previously washed away, eroded and further hardened the surface is retained, water balance is restored and vegetation grows back. Restoring vegetation restores the water cycle. When this is done over a large area, it helps generate clouds, increasing rainfall in the area. This rain benefits vegetation, which continues to improve water tables and desertified lands are transformed into lush, green areas.
Water use efficiency
Main theme:
African
Region:
100 - 300
Precipitation (mm):
Low
Application difficulty:
6, 11, 12, 13 and 16
SDGs impacted:
Gravity
Energy used:
50 - 70
Efficiency (%):
Rural
Sector:
Water conservation and vegetation cover
Expected environmental impact:
$100 - $300/ha
Estimated value:
Links of interest: