Climatic conditions in Dingxi county

Dingxi city is notoriously poor both inside and outside the province. As early as the end of the Qing Dynasty, Governor Zuo of Shaanxi and Gansu led his troops through Dingxi and saw the tragic scene of "a thousand miles of land, ten rooms and nine empty spaces". In his memorial to Emperor Tongzhi, he said that "the middle of Gansu is miserable in the world". Dingxi City is located in the middle of Gansu Province and the north of Dingxi area, with a total area of 3,638.7 square kilometers. It has jurisdiction over 24 townships, 2 towns, 30 1 administrative village, 9 residents' committees, 2,286 production cooperatives and 402,000 people, including 357,300 agricultural people. There are eight fraternal nationalities, including Han, Hui, Manchu, Zhuang, Tibetan and Dongxiang, among which Han accounts for 97.25% and Hui accounts for 2.73%. Dingxi County is located at the western edge of the Loess Plateau and the end of the West Qinling Mountains, belonging to the hilly and gully region of the Loess Plateau. The terrain is high in the south and low in the north, with many mountains and few rivers, criss-crossing gullies and broken terrain. Altitude 1700m-2580m. Rivers in the territory are seasonal rivers, with scarce groundwater and mostly salty and bitter. Loess has deep overburden, serious soil erosion, poor soil fertility, poor water retention and sparse vegetation. Due to the fact that Liupanshan and West Qinling blocked the inflow of humid air from the southeast, and influenced by the dry and cold air in Inner Mongolia, there is more light energy in the territory, but the potential is insufficient, the rainfall is small and the variability is large. The climate characteristics of continental monsoon are obvious. The annual average precipitation is 425mm, the evaporation is as high as 1526mm, the sunshine lasts for 2500 hours, and the annual average temperature is 6.3 degrees. Drought, cold, low temperature and hail are the biggest threats to agricultural production. Grain output is low and unstable.