qanat

With a POD before 600 AD, the earlier the better, how could a significant number of Persians (not just nobles, but farmers, merchants, and soldiers) settle in Anatolia and assimilate it into the Persian sphere? What would change in the ultimate development of Anatolia if Persian agriculture...

The qanat was an ancient Persian technology to collect subterranean water by building a sequence of channels starting (underground) in the mountains and sloping down into irrigated farmland. It is actually still used today in Iran. This technology spread to Armenia and Kurdistan, but as far as...