Similar to a sieve, the willows allow water to flow through but trap the sediment back. Within a year, these structures can trap up to 10cm of sediment. Over time, this increases as the willows become more established and more sediment can be kept back. After 20 to 30 years, the vegetation will have complete cover and sediment erosion is almost completely stopped.
When the rains fail: how this young family is learning to be climate-smart
#Farming in Kitui, Kenya can be difficult. When the rains fail and #drought hits, Peter's soils run through his hands like dust. That's why Farm Africa is training farmers in soil conservation techniques.