De qué está hecho qanat
An underground channel that collects groundwater by gravity.
- Mother well shaft — tiene como parte. A vertical shaft down to the aquifer.
- Underground water tunnel — tiene como parte. A gently sloping tunnel through which water flows to the fields.
- Row of vertical access shafts — tiene como parte. A chain of shafts for digging and ventilation.
- Flujo por gravedad — utiliza. Water flows by gravity.
- Arcilla — está hecho de. Weak sections of a qanat were reinforced with clay rings.