坎儿井（Karez）.doc

坎儿井（Karez） Karez Fellow friends: Good morning. Believe that yesterdays experience has let everyone to experience known as Fire Island in Turpan, much of it. Turpan is a world famous Huozhou, mean annual precipitation, its only about 16 mm, while the average annual evaporation is as high as 3000 mm. It is the driest place in china. But in the driest part of the country, there are about 500000 people. In particular the construction of a grape in the flame mountain of the world known to the world, thanks to the life of Karez oasis. I will take you to visit this world famous underground water - karez. A total of more than 1600 Xinjiang Karez, mainly distributed in the Turpan basin, Hami basin, southern Kuche and Northern Qitai, Pishan, Mulei, bukang etc.. In the area of Turpan is more than 1200, the total length of 5000 kilometers, which is equivalent to the length of the famous the Great Wall, known as the underground the Great Wall, and the Great Wall, Beijing Hangzhou the Grande Canale and known as the three ancient Chinese engineering. Karez is known as the underground the Great Wall, as the name implies, Karez is a huge underground engineering. Since everyone on the Karez construction method so curious, Ill introduce you in detail. Karez consists of shafts, beam and channel and flood ridge of four parts. In the mountain snow slush site, choose a suitable site excavation. On the ground, every few meters or tens of meters dug a shaft dug, connecting shaft from the bottom to the side, on the formation of the culvert. The role is to dig out from the culvert in sand take to the surface, and the ventilation and lighting effects, in order to prevent the human or animal after accidentally fall into the ground, to prevent sand blown away by the wind into the blocked culverts, wellhead each shaft are covered, so that not only can prevent groundwater evaporate, also can keep the water from pollution. The culvert is the function of the underground water in the water into it. C