Yijun County, Tongchuan City, Shaanxi Province

Yijun County Yijun County, belonging to Tongchuan City, Shaanxi Province, is located in the middle of Shaanxi Province, the north of Tongchuan City, the junction of Guanzhong Plain and the Loess Plateau of Northern Shaanxi. The county is 120 kilometers away from the provincial capital Xi'an in the South and 27 kilometers away from Xuanyuan Huangdi mausoleum in the north, with a total area of 1531 square kilometers. 210 national highway and tonghuang first-class highway pass through the territory, known as the "Overpass from Guanzhong to northern Shaanxi".

Yijun county is not only named for Yijun water, but also named for the king's summer resort. There are Yangshao cultural sites, Pengzu's hometown, Northern Wei grottoes, Jiangnu lachrymal spring, Yunmeng Mountain Daojiao resort, and the great wall of Warring States and Wei. Among them, Yijun Great Wall of Warring States and Wei is listed as the world cultural heritage of the great wall of China.

By 2018, Yijun county has one street, six towns and one township. In 2017, the permanent resident population of Yijun county was 92100, and the GDP was 3.8047 billion yuan, including 647.1 million yuan of the added value of the primary industry, 2154 million yuan of the added value of the secondary industry, and 1003.6 million yuan of the added value of the tertiary industry. The proportion of the three industrial structure was 17:56.6:26.4.

Historical evolution

The origin of place names

Yijun county is known as "Yijun" because the emperor of the Tang dynasty built a summer palace here more than 1000 years ago.

History of construction

Yijun was a secluded place of Yongzhou in ancient times.

Internal history of Qin Dynasty.

In the second year of emperor Jing of the Western Han Dynasty (155 BC), it belonged to zuofengyi county.

In the first year of the Wei and Huang dynasties (220), the Three Kingdoms moved to Niyang County in Gansu Province. Later, the county was abandoned and renamed as Niyang County, belonging to Beidi county. Because of this, the Western Jin Dynasty.

In 358, Yijun garrison was set up in Gangu city.

In 446, the seventh year of Taiping Zhenjun in the Northern Wei Dynasty, Yijun county was established, belonging to Beidi County of Yongzhou. Because the county Xichuan Yijun water (now Yaoxian Juhe), so the name. In the first year of Yong'an (528), it was divided into Beidi county and Yijun county. In the Northern Wei Dynasty, it was divided into two parts: Shibao county (now in the west of Yijun County, in the east of Yijun County, originally in the middle of the county) and the central county of Eastern Qinzhou (renamed beihuazhou in the second year of Xiaochang). The Western Wei Dynasty and the Northern Zhou Dynasty followed the old system.

Sui kaihuang three years (583), the withdrawal of Yijun County, and Shibao County into Yijun County, belonging to Jingzhao county. In 618, Yijun County, Tongguan county and Huayuan County were divided from Jingzhao County, and Yijun county was set up to govern Huayuan County.

In 618, the county was changed into a prefecture, and Yijun county was subordinate to Yizhou. In 643, Yijun county was abolished. Zhenguan twenty years (646) and home county, is Yongzhou. In the second year of Yonghui (651), the county was abolished. In the third year of longshuo's reign (663), the central part of the country was cut off, and Yijun county was replaced by two counties with the same government. In the twelfth year of Tianbao's reign (753), Yijun county was divided into Shengping county.

In the Five Dynasties and Northern Song Dynasty, Yijun County belonged to Yan'an Fufang Prefecture. Xining first year (1068), jiangshengping County as the town, under the jurisdiction of Yijun County, under Yongxing Road Fangzhou.

In the Jin Dynasty, Yongxing Road was changed into Manyan Road, and Yijun county was under the state of Manyan road.

In the Yuan Dynasty, Manyan road was changed to Yan'an Road, and Yijun County belonged to Fangzhou. In the sixth year of Zhiyuan (1269), Fangzhou was abandoned and changed to Yan'an Luzhou.

In Ming and early Qing Dynasty, Yijun County belonged to Yan'an Prefecture, which was Zhili Province in 1726.

At the beginning of the Republic of China, Yijun County belonged to Yulin Road, Shaanxi Province. After the abolition of the road, belongs to the office of the third administrative inspector general of Shaanxi Province (in the middle also belongs to the office of the second administrative inspector general). On March 10, 1948, Yijun county was liberated and established people's political power, which was originally under the Huanglong division of the Shaanxi Gansu Ningxia border region.

In 1950, Huanglong district was abolished and changed to Yan'an District of Shaanxi Province (later renamed Yan'an District Office).

In December 1958, Yijun and Huangling merged into Huangling County.

On September 15, 1961, Yijun county system was restored.

In September 1983, Yijun county was under the jurisdiction of Tongchuan City.

On May 7, 2019, the people's Government of Shaanxi Province approved Yijun county to withdraw from the poverty county sequence.

administrative division

Division evolution

In 1966, during the socialist education movement, the county abolished the Jinpen and Baihe communes, merged the jurisdiction of the two communes into three communes, namely Yijun, Pianqiao and Wuli Town, and adjusted some brigades at the same time. So far, the county has become 14 people's communes, 170 production teams and 645 production teams. The jurisdiction of each commune is:

Yijun commune has 17 production teams and 68 production teams.

Yaosheng commune has 10 production teams and 40 production teams.

Xiankou commune has 9 production teams and 34 production teams.

Yunmeng commune has 10 production teams and 42 production teams.

Chessboard commune has 13 production teams and 51 production teams.

Xicun commune has 10 production teams and 55 production teams.

Shancha commune has 14 production teams and 34 production teams.

Gaoloudi commune has 10 production teams and 31 production teams.

Wuli Town commune has 16 production teams and 56 production teams.

Jiaoping commune has 9 production teams and 32 production teams.

Kuiquan commune has 10 production teams and 40 production teams.

The temple Tiangong society has 12 production teams and 43 production teams.

Pianqiao commune has 18 production teams and 71 production teams.

Leiyuan commune has 12 production teams and 48 production teams.

Since April 1984, the people's communes have been changed into two towns and 12 townships, with people's governments set up in the towns; 176 production teams have been changed into villagers' committees, and 642 production teams have been changed into villagers' groups.

Current situation of regionalization

By 2018, Yijun county has one street, six towns and one township. Yijun County People's Government in Yiyang street.

geographical environment

Location context

Yijun county is located in the southern margin of Northern Shaanxi, known as "the key to the north gate of Chang'an" in ancient times. It borders Luohe River in the East, Luochuan County in the south, Baishui and Tongchuan suburbs in the south, and Huangling County in Yan'an City in the West and North. It is between 108 ° 54 ′ 37 ″ - 109 ° 28 ′ 46 ″ E and 35 ° 07 ′ 34 "- 35 ° 34 ′ 58" n. It is 51.9 km long from east to west and 50.3 km wide from north to south, with a total area of 1501 square kilometers. It is 33 kilometers to Huangling County in the north, 204 kilometers to Yan'an City, 45 kilometers to Tongchuan City in the South and 173 kilometers to Xi'an City, the provincial capital.

topographic features

Yijun county is located in the Qiaoshan mountain system of Ziwuling mountain. The terrain is high in the southwest and low in the northeast. It is ladder shaped from west to East. Only the East and northeast parts are broken Loess Plateau. The lowest altitude is 622 meters, the highest is more than 1734 meters, and the relative elevation difference is 1112.9 meters.

Climatic characteristics

Yijun county is a temperate continental monsoon climate zone. In winter, it is controlled by polar continental air mass from Siberia or Mongolia, with dry and cold climate and few rain and snow. Summer is mainly affected by warm air mass in the Pacific and Mongolia low pressure, warm and humid, thunderstorm and hail. In spring and autumn, affected by the alternation of these two air masses, the temperature rises slowly and unsteadily in spring, and it is windy and frosty; in autumn, it cools quickly, and it is rainy. Because Yijun is located between Guanzhong Plain and Northern Shaanxi plateau, and there is a great difference between the East and the West in geomorphology, there are obvious regional differences in climatic factors. Its main characteristics are: long winter and short summer, cold winter and cool summer, dry winter and spring, rainy summer and autumn, four distinct seasons; low temperature, more rainfall, regional meridional differences. There are obvious characteristics of microclimate in mountainous areas in the West.

natural resources

water resource

The average annual runoff of surface water in Yijun is 77.62 million cubic meters, accounting for 7.85% of the annual precipitation of 989.37 million cubic meters. The average annual runoff depth of the whole county is 52mm, the runoff coefficient is 0.078, and the average annual runoff per square kilometer is 52000 cubic meters. The highest value is in the hilly area of Western China, with large precipitation, steep slope, small permeability coefficient, annual runoff depth of 61mm, and runoff flow difference coefficient of 0.65. The runoff depth and variation coefficient are equal to the average value of the whole county. Because of less precipitation in the eastern gully region of remnant tableland. The runoff depth is 47mm and the coefficient of variation is 0.6.

The watershed of surface runoff is Miaoshan Yunmeng Mountain, which belongs to Luohe River and Weihe River. It belongs to Luohe River Basin, accounting for 89.2% of the county area. The rivers formed are leiyuan River, wulizhen River, Qinghe River, Shancha River, dongpinggou River, lingligou River, dongshegou River, menghuanggou River and the upper reaches of Baishui River. The total annual runoff is 6857 cubic meters, accounting for 88.5% of the total annual surface water in the county. All of them flow to the East or northeast and enter the branch of Luohe River, Juhe river or directly into Luohe River. It belongs to the Weihe River system, accounting for 10.8% of the total area of the county. There are Wujia River and Tangni River (the ancient name of Goddess water), with a total annual runoff of 895 cubic meters, accounting for 11.5%. It flows southward into the Qishui River in Tongchuan. All the above rivers originate in the county and are seasonal rivers. The variation of runoff is basically consistent with the annual distribution of rainfall, most of which are concentrated in July to October, with sharp rise and fall, accounting for 56.6% of the total annual runoff. At ordinary times, the flow is very small, and there is a wide gap between the rich and the poor. In addition, the river channels and gullies are very deep, so there is a lot of water loss and a small amount of water available for irrigation. The average annual runoff of keshui Luohe River is 397 million cubic meters, which bypasses the eastern edge of the county. The terrain is at the lowest part of the county, and irrigation is difficult to use. However, the river bed gradient is large and there are many water drops, so it is better to develop small hydropower.

plant resources

Yijun county belongs to warm temperate forest steppe vegetation zone. The natural vegetation coverage rate is high, reaching 87.3%. Among them, the forest coverage rate is 27.6%. Because Yijun county is located in the transition zone between the monsoon humid area and the inland arid area in eastern China, and the climate difference between the East and the west is large, the vegetation has obvious horizontal zonal distribution. The vegetation community is complex and diverse. From vegetation to landscape

Chinese PinYin : Shan Xi Sheng Tong Chuan Shi Yi Jun1 Xian