Turpan Depression is the third lowest point around the Earth's surface

  Turpan Depression is the third lowest point around the Earth's surface. A 33765 km2 area from the Turpan Depression has been examined by using a number of image processing methods with Idrisi Taiga program within this project. The geographical place produced the depression extremely dry and hot. The excellent wind condition of the region enables the setting of Dabancheng Wind Farm. NDVI is sensible to identify vegetation covering and water bodies. The reduce in water bodies and improve in vegetation inside of the depression from 1998 to 2010 may have resulted from the irrigation system or other factors within the region. By clasification and area calculation tools in Idrisi, the precise area of vegetation covering can be calculated, and 0.1% decrease in vegetation covering from 1998 to 2010 was concluded. The composite image by combining bands two, NDVI and five corresponded with blue, green and red show dramastic color contrast. Water bodies are obviously shown in the NDVI composite images, and also the water in Aydingkol Lake decreased from 1998 to 2010. TM bands 345 and 147 composites are effective to detect sand dunes.

  Turpan has a wealthy ancient previous. Numerous civilizations, cultures, and religions put down roots here. Under the strong Tang Dynasty ruled each China and Tarim Basin, Turfan enjoyed its golden age. Following the fall of Tang in 790 A.D., it was invaded by Tibetans from the south. By the middle of the ninth century, a nomadic individuals from the Altai Mountains, the Uygurs ruled Turpan for subsequent couple of centuries. They managed to survive the Mongol terror by cooperating using the conquerors during the 13th century. At the time of 20 BC to 200 AD, The Turpan oasis was a crucial point along the Northern Silk Road, and the cities of Ediqut, and later Astana had been important and wealthy centers of energy. From the ninth to the thirteenth century, a rich intellectual and artistic culture developed in Astana, resulting from a fusion in between the original Indo-European inhabitants and also the (pre-Islamic) Uygur. It was not till the fourteenth century that the Uygur of Turpan converted to Islam. It was known as Gushi in ancient occasions and will be the place exactly where the State of South Cheshi and also the South Cheshi Court had been set up throughout the Han dynasty. It was established as Gaochang Prefecture where Tiandi County was set up during Liang dynasty. Founded as the State of Gaochang during the Northern Wei dynasty; renamed Xichang prefecture during the Tang dynasty until 1913, Turpan County was established.