The lowest temperature in winter in Ganquan.

The annual average minimum temperature is-10℃. The extreme minimum temperature over the years is -26. 1℃.

Ganquan county belongs to the semi-humid climate of continental monsoon on the plateau, with four distinct seasons: cold, warm, dry and wet. Warm and windy in spring, hot and rainy in summer, cool and humid in autumn, cold and rainy in winter, short in summer and long in winter.

In spring, affected by the denatured polar continental air mass, the temperature is wet, cool, dry and rising, with an average daily increase of 0.265438 0℃. The daily temperature difference is large, which is prone to cold wave, frost, strong wind and other weather, and often spring drought. From April 6th to July 20th, it lasted about 106 days, and the average temperature was 10 ~ 20℃.

In summer, the temperature is high, with a lot of precipitation, thunderstorms and hail. Affected by cold air activities and topography, rainfall distribution is uneven, and there are also summer droughts. Sunshine for more than 7 hours, mild at night, short-term high temperature in the afternoon, and occasional extreme high temperature. The extreme maximum temperature over the years is 36.8℃ (1June 974 16). The annual average temperature is 20.8℃; The ten-day average temperature is 22.6℃, from July 2/kloc-0 to August 5, about 16 days (seasonal waiting method).

Autumn is cool, humid, rainy and fast, and the average daily cooling value in early autumn is four times that in late summer. The weather is sunny in late autumn, and there is a drought in autumn once every few years. August 6th to1October 10, about 66 days, with an average temperature of 8.4℃.

Winter is controlled by Mongolian cold air mass, and the climate is cold and dry. The sunshine percentage is 58, and the weather is fine. The average seasonal temperature is -5.0℃, which varies greatly during the year, with an average range of 1. The annual average minimum temperature is-10℃. The extreme minimum temperature over the years is -26. 1℃(0984 65438+ 18 February 65438). From June 65438+1October 1 1 to April 5 of the following year, the average 177 days.

Ganquan County belongs to the hilly and gully region of the Loess Plateau in northern Shaanxi, located in the middle of Yan 'an City, Shaanxi Province, with a semi-humid inland monsoon climate. The total area is 2,284.7 square kilometers, the total cultivated land area of the county is 609,000 mu, and the forest coverage rate is 78.4%, of which the forest coverage rate is 50.5%.

Ganquan is named after the spring water located at the foot of the deep forest mountain, 5 kilometers southwest of the city, and is called "the beautiful hometown of water". There is a history in the Western Zhou Dynasty. Diaoyin County was established in the Qin Dynasty, Linzhen County was established in the early Northern Wei Dynasty, Fulu County was established in the first year of Tang Wude, and Ganquan County was established in the first year of Tianbao. Places of interest include the site of Qin Zhidao, Shuimeiquan named by Yang Di, Bailu Temple in Tang Dynasty, the Millennium Ginkgo Tree and the ancient tomb in Song Dynasty.

Located in the middle of Yan 'an area. It is located at10845' 34 "east longitude ~10933' 46" north latitude 366' 57 "~ 3637' 33". Yan 'an City is adjacent to the east, Zhidan County to the west, Ansai County to the north and Pi Fu County to the south. The county seat is 333 kilometers from Tongchuan to the provincial capital Xi in the south and 40 kilometers from Yan 'an in the north. The county is about 80 kilometers long from east to west and 50 kilometers wide from east to west.

topography

Ganquan belongs to the hilly and gully region of the Loess Plateau in northern Shaanxi, and its landform is long from southeast to northwest and narrow from northeast to southwest. Luohe runs through Ganquan County from northwest to southeast. The terrain inclines from northwest to southeast, with an altitude of 950 ~1625m. Dunliang in the west is the highest point in Ganquan County, with an altitude of 1 625m, and Lanjiachuan River bed in the south is the lowest point, with an altitude of 950m. The Luohe river basin is relatively flat, with a width of 500 ~ 1000m, accounting for about 10% of the total area of Ganquan county. In the rest of the vast areas, the hills and gullies on the loess beam are staggered, and the relative height difference is below 200 meters.

climate

Ganquan county belongs to the semi-humid climate of continental monsoon on the plateau, with four distinct seasons: cold, warm, dry and wet. Warm and windy in spring, hot and rainy in summer, cool and humid in autumn, cold and rainy in winter, short in summer and long in winter. The annual average temperature is 8.6 years. The average sunshine hours are 2478.7 hours and 6.8 hours. The temperature difference between day and night is large. The annual average frost-free period is 148 days, and the annual rainfall is126.3mm. ..

resources

water resource

The total storage capacity of river crossing in Ganquan County is 314.2 million cubic meters, and the self-produced water is 612.2 million cubic meters. The total surface runoff is 0.610.29 billion cubic meters, accounting for 4.7% of the total precipitation; The total amount of shallow groundwater is 0.39 1 100 million cubic meters, accounting for 2.3% of the total precipitation. Evaporation through soil, plants, water surface, etc. The average evaporation depth is 523 mm, and the transpiration amount is11990,000 cubic meters, accounting for 92.9% of the total precipitation. The total water resources in Ganquan are 60.83 million cubic meters, of which the channel runoff is 0.6129 million cubic meters, the per capita water consumption is 1. 1.74 cubic meters, and the water consumption per mu is 1.98 cubic meters. The water reserves are large, the 50% guarantee rate is 25 m3/s, and the exploitable capacity is1.377W in terms of flow.

plant resources

Ganquan county is rich in plant resources, with a wide area and many species, with forest resources of 1742800 mu and coverage rate of 50.1%; Forage resources 1007298 mu, with 365 species ***7 1 family; Planting crops of 465,524.73 mu. Ganquan is a zonal vegetation, belonging to the northern deciduous oak forest belt in the warm temperate deciduous broad-leaved forest belt. The coverage rate of trees and shrubs in Ganquan County is 50.69%. The forest is dominated by juvenile miscellaneous forests. In the age structure, secondary forests account for about four fifths. The total volume of standing trees is 425.3 1 m3, the annual gross length rate is 5.3%, and the gross length is 225,000 m3. The net growth rate is 2. 15%, and the net growth rate is 9 1000m3.

Animal resources

Fish are carp, grass carp, red fish, herring and bighead carp. There are many kinds of amphibians, most of which belong to Anura, Bufonidae and Ranidae. There are mainly toads and frogs. Reptiles include soft-shelled turtle, gecko, cobra, viper, bamboo leaf green, and occasionally silver ring snake and red snake.

Birds include ducks, geese, eagles, chickens, pheasants, pheasants, pigeons, turtledoves, cuckoos, sparrows, owls, owls, owls, Dai Sheng, woodpeckers, swallows, magpies, grey magpies, crows, crows, western Western jackdaw, larks, orioles and Ye Ying.

Animals are mole, bat, pika, sable, squirrel, chipmunk, vole, hamster, wolf, fox, jackal, German shepherd, poodle, weasel, ferret, badger, otter, leopard cat, cat, leopard, horse, mule and donkey.

Human population

The peak of China's population was in Tianshun, Jiajing and Qin Long periods of the Ming Dynasty. There are about 2530 households in Ganquan County, with 2707 1 person. In the second year of Tongzhi in Qing Dynasty (1863), more than half of the people fled because of the shortage of soldiers, diseases and wolves. By the year of Xuantongyuan (1909), there were 1280 households and 3,740 people in Ganquan.

During the Republic of China, refugees from other provinces flooded into Ganquan, and victims in Yulin area moved to Ganquan County one after another. Due to wars, disasters and frequent wars, the population development of Ganquan in past dynasties fluctuated.

After the founding of People's Republic of China (PRC), with the development of production and the improvement of people's life, the total population has increased year by year. In 1949, the population of Ganquan County was 17867 and 1979, respectively, reaching 54 104 and 1989, respectively, with 64,684 people, accounting for 3.5% of the population of 1949.

In the fifth census in 2000, the total population of Ganquan County was 76,705. 20 1 1 year, the self-growth rate of population in Ganquan county is controlled within 5‰.

The nationalities in Ganquan County are Han, Mongolian, Hui, Tibetan, Miao, Yi, Buyi, Manchu and Tujia.

economy

agriculture

Grain planting in Ganquan County has always been dominated by late autumn crops (millet, millet, corn, beans, sorghum, buckwheat, etc.). ). 1949 Grain sown area 188600 mu, yield per mu of 20.5 kg, total output 1933000 kg. From 1950 to 1960, the sown area of broomcorn millet was the largest, reaching 37,000 mu (67.5 kg per mu), accounting for 22. 1% of the total sown area. Followed by millet 35,200 mu (60 kg per mu), accounting for 2 1% of the total sown area. 27,400 mu of corn (42.5 kg per mu), accounting for 13% of the total sown area. Wheat 1.464 million mu (26.5 kg per mu), accounting for 8.7% of the total sown area. 8800 mu of beans (34 kg per mu), accounting for 5.3% of the total sown area. Rice is 0.10.3 million mu, accounting for 0.8% of the total sown area, and the yield per mu is10.06 kg.