Zai pits and stone lines used for water Harvesting
This video in very advanced computer rendered 3D animation shows you simple concepts that will help you understand how simply a water harvesting method can be used.
(Video is an edit from doing the bush presentation in Ghana)
See how the sediment build up on the front side of the stone line helps built up water retention.
See how when stone line and zai pit works together it all makes perfect sense.
See how the water flows from a dried up creek into a stone line and passes the barrier slowly.
Now imagine planting a crop in the zai pits with the help of stone lines.