The Karez Concept in Ancient Chinese Sources Myth or Reality?

中国古代文献中坎儿井的概念：神话还是现实？

Marines with Battalion 1/8 on patrol near the village of Da Karez on Oct. 13, 2010.

1/8大队的 海军陆战队员在村庄附近巡逻。 摄于2010年10月13日，达卡莱滋。

Xinjiang Karez back in the Han Dynasty two thousand years ago, there were problems of its shape.

新疆的坎儿井早在两千年前的汉代即出现其雏形。

So the local people in this particular geographical, ecological environment and created a Karez water-saving water conservation irrigation methods.

于是当地人民在这种特殊的地理生态环境下创造出了坎儿井的节水保水灌溉方法。