It is adjacent to Alashan League in Inner Mongolia Autonomous Region in the north, Xinjiang Uygur Autonomous Region in the west, Haixi Mongolian Autonomous Prefecture and Haibei Tibetan Autonomous Prefecture in Qinghai Province in the south, and Zhangye City in the east. It is about 680 kilometers long from east to west and 550 kilometers wide from north to south, with a total area of 6.5438+0.92 million square kilometers, accounting for 42% of the area of Gansu Province.
Extended data:
The strata in Jiuquan belong to three stratigraphic divisions (Tianshan-Inner Mongolia, Tarim and North China), namely, Lower Proterozoic, Mesoproterozoic, Upper Proterozoic, Cambrian, Ordovician-Silurian, Silurian, Devonian and Carboniferous.
Climatic characteristics:
Jiuquan is a semi-desert arid climate, characterized by dry climate, less precipitation, strong evaporation, long sunshine, large temperature difference in Leng Xia in winter, cool in autumn and windy and dusty in spring. Temperature: the lowest in the whole year is -3 1.6℃, the annual average temperature is 7.9℃, and the temperature difference between day and night is large. The dominant wind direction throughout the year is southwest wind, followed by east wind and northwest wind.
The maximum wind speed is 26 m/s, the average wind speed is 2.3 m/s, the annual average rainfall is 84 mm, and the maximum rainfall is 158 mm, which is concentrated in June-10, and the annual average rainfall is 62 days. The average annual evaporation is 2 1, 4 1.4 mm, which is 27.3 times more than the rainfall. Relative humidity: the highest is 56%, with an annual average of 46%.
Snow: maximum snow depth14 mm. At the coldest time, the frozen soil depth is1.32m, and the freezing period is generally 165438+ 10 to April of the following year. The average sunshine hours in the whole year are 3056.4 hours, and the sunshine percentage is 69% on average, reaching 78% in June 5438+ 10.
Baidu Encyclopedia-Jiuquan