The system consists of square shaped embankments. On three sides there are nine inch walls and one side is left open to allow rainwater to fill the structure. As one structure fills, then the overflow fills the next chauka and so on. Retaining the rainwater in this way helps prevent soil erosion and recharges the surface water enabling various grasses to thrive. This has the effect of holding the soil together and, as the chauka system is used mostly on common land, provides grazing areas for cow and goat herds. For this to be effective it is combined with the planting of grass seeds and trees.
