Dredging a Qanat
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Dredging a Qanat

Persian underground supply channels: a gradient of less than 1:1000 is achieved using string and a spirit level, to supply water over distances of up to fifty miles.
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Dredging a Qanat
Next
Previous

Dredging a Qanat

Persian underground supply channels: a gradient of less than 1:1000 is achieved using string and a spirit level, to supply water over distances of up to fifty miles.
Ref:
Date:
Location:
Photographer:
Iran

Dredging a Qanat

Persian underground supply channels: a gradient of less than 1:1000 is achieved using string and a spirit level, to supply water over distances of up to fifty miles.
Ref:
Date:
Location:
Photographer: