- or more properly the canal feeding karezes (wells)
millennia ago the high level of traffic on the Silk Road meant Turpan
needed good water supply for humans, animals and agriculture.
Water from the Tienshan rivers was brought through a complex network of
underground canals which linked karezes where water was drawn.
Today much of the network is still operational with 1,100 wells and
about 3,000 miles of channels in use for general and irrigation
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