Geography of Huanglong county

Huanglong County is located in the north-central part of Shaanxi Province, southeast of Yan 'an City, an old revolutionary base area.

It is adjacent to Luochuan in the west, Baishui, Chengcheng and Heyang in the south, Hancheng in the east and Yichuan in the north. It is a transitional zone between Weibei dry plateau in Shaanxi and Loess Plateau in northern Shaanxi, and belongs to a rare semi-humid warm temperate climate zone north of Qinling Mountains in Shaanxi.

Huanglong County is located at east longitude109 38' 49 "~1016' 49" and north latitude 35 24' 09 "~ 36 02'11". It belongs to continental semi-humid monsoon climate. In winter, Mongolia is cold, high pressure and polar.

The weather is cold and dry, and precipitation is scarce. In spring, the influence of heating mass increases, the temperature rises rapidly, there are many strong winds, and the precipitation increases relatively. In summer, affected by Mongolian cyclone and Pacific subtropical ocean air mass, the weather is warm and rainy, precipitation is concentrated, and there are many showers, and the precipitation ranks first in the whole year. Cold and warm air appears alternately in autumn, and the temperature drops slowly in early autumn, with rainy weather.

Due to the terrain, the temperature difference between east, west, north and south is very large, and the annual average temperature is 7.6- 10.2℃. Among them, Fanjiazhuozi Township and Bai Matan Town are the hottest, and Baxian Township is the coldest. The average temperature in the hottest month is 265,438 0.5℃, and the extreme maximum temperature is 36.7℃. The average temperature in Leng Yue is -5.7℃, the extreme minimum temperature is -23.7℃, and the annual average temperature is 27.2℃. The frost-free period is 126- 186 days, with a difference of 60 days between north and south. The annual precipitation is about 600 mm, and the precipitation in the northwest is greater than that in the southeast. Disastrous weather mainly includes frost, drought, hail, continuous rain and so on. The annual average temperature in Huanglong County is 9.5℃, which is fresh water and has no industrial pollution. Huanglong county has sedimentary minerals, among which oil tribute rock, coal, humic acid fertilizer coal, iron and so on have not been officially explored and calculated, and they are mine points and mineralization points; Other mineralization phenomena include oil seedling display, building stone, brick clay, limestone and so on.