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Underground Irrigation System

Underground Irrigation System Xinjiang is known for its karez, irrigation systems composed of wells connected by a network of underground channels, which are an ingenious anti-drought invention of the local people. This system is composed of vertical wells, underground channels and surface ditches. The vertical wells measure from several meters close to the oasis to 90 meters deep in the section close to channels, and the channels stretch from several kilometers to 100 kilometers long.

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