Gley method
The gley method can be used to line ponds and canals. By adding organic materials like banana leaves, grass and manure to the bottom soil of the pond and treating it with cardboard and/or soil, an impermeable layer will be formed as the result of anaerobic decay. This layer prevents leaking and hence results in a higher irrigation efficiency. Especially for farmers without access to groundwater, this technique could be used to retain rainfall and runoff water at the surface. Note that the impermeable layer results in a hampered aquifer recharge.
