【正文】
s total area of square kilometers, of which the oasis area of 1400 square kilometers, accounted for only % of the total area, and surrounded by a desert gobi, reason has gobi oasis. Dunhuang is located in the interior, obvious is characterized by dry climate, large temperature difference between day and night, less rainfall, evaporation, sunshine time is long, clear four seasons. Due to the lack of rain, the annual average rainfall of millimeters, evaporation is 2486 mm, so has the obvious desert climate characteristics, belongs to the typical continental arid climate. Oasis by DangHe tonic, originated in qilian mountain north flow DangHe, total length of 390 km, the basin area of square kilometers, the annual runoff is 328 million cubic meters, is an important water conservancy lifeblood of dunhuang, except DangHe in surface water east and west ditch, ditch, south lake springs, spring always overflow volume of cubic meters per second, annual runoff is million cubic meters. The development and utilization of groundwater, dunhuang has bee the main source of people39。 The world famous cultural heritage, talented people... Beauty of dunhuang, was a productive land, magic and attractive. , big also。 West out of the sunlight, western region south road, connected with the ruoqiang county of xinjiang along the silk road。 Northwest line yumenguan, along the west, north to hami and lop nur were systematically stud Ed Dunhuang south through thoroughly kazak autonomous county, more than the altun, direct the golmud in qinghai province. Dunhuang grottoes, also known as the mogao grottoes, thousandbuddha grottoes, located 25 kilometers southeast of dunhuang the singing of the cliffs, is one of the world famous four grottoes, also represents China39。 bright, also. Grand glory of dunhuang has a long history, splendid culture! As early as the late primitive society, the central plains tribes are migrating to the defeat of hexi three miao people thrive here. Is given priority to with hunting, they are beginning to grasp the original agricultural production technology. Dunhuang area had excavated neolithic flint knives, stone axes and pottery, bronze. Xia, shang and zhou, dunhuang belong to th