Yiling District, Yichang City, Hubei Province

Yiling District Yiling District, belonging to Yichang City, Hubei Province, is located in the transition zone from western Hubei mountain area to Jianghan Plain and on both sides of the Xiling Gorge of the Yangtze River. With a total area of 3438.99 square kilometers, Yiling District has jurisdiction over one street, nine towns, two townships, and two township level units. Xiaoxita sub district office is the resident of the District People's government. By the end of 2017, the total registered residence of Yiling district was 521481.

”Water here and Yi, mountain here and Ling, "hence the name" Yiling. ". On March 22, 2001, the State Council approved the abolition of Yichang county and the establishment of Yiling District of Yichang city. On July 28, Yiling District was officially established. There are 6 expressways, 3 national roads, 6 provincial roads, Jiaoliu line and Yayi railway in Yiling District. In October 2017, Yiling District of Yichang city was listed as the first batch of national agricultural sustainable development experimental demonstration areas by the Ministry of agriculture. On December 14, 2017, Yiling District was rated as one of the top 100 industrial districts in China. On October 22, 2018, it was selected into the list of pilot areas for the integrated development of rural primary, secondary and tertiary industries in 2018. On March 6, 2019, Yiling District was selected as the first batch of counties in revolutionary cultural relics protection and utilization area. In September 2019, it will be selected as one of the first batch of national global tourism demonstration zones. On November 18, 2019, Yiling District was selected as the "pilot county of agricultural green development pilot support system construction". Yiling District has three gorges people, Three Gorges Dam and other tourist attractions.

In 2018, Yiling District achieved a GDP of 57.339 billion yuan, an increase of 7.5% over the previous year at comparable prices. Among them, the added value of the primary industry was 6.167 billion yuan, an increase of 3.2%; the added value of the secondary industry was 32.544 billion yuan, an increase of 7.4%; the added value of the tertiary industry was 18.628 billion yuan, an increase of 9.2%. The structure of the three industries was adjusted from 12.09:58.52:29.39 to 10.75:56.76:32.49. Compared with the previous year, the primary industry decreased by 1.34 percentage points, the secondary industry decreased by 1.76 percentage points, and the tertiary industry increased by 3.10 percentage points.

Historical evolution

Yiling is named after "the water is here and the mountain is here and the mausoleum is there". It belonged to Jingzhou in ancient times.

In the early Zhou Dynasty, it was the place of Kui state.

In the 38th year of King Cheng of Chu (634 BC), Chu destroyed Kui, which was attributed to Chu and became an important frontier area in the western frontier. " Water here and Yi, mountain here and Ling, "hence the name" Yiling. ". In 278 BC, in the 21st year of King Qingxiang of Chu, Qin general Bai Qi "attacked Chu, pulled out Ying and burned Yi mausoleum". The name of Yi mausoleum began to appear in history.

In the first year of the first emperor of Qin Dynasty (221 BC), prefectures and counties were under the control of the whole country, and Yiling was changed to Wuxian. Yiling county was established in the Western Han Dynasty, belonging to Nanjun county.

In the Eastern Han Dynasty, in the 13th year of Jian'an (208), Yiling County belonged to Linjiang County, which was established to the west of Zhijiang in fennan County of Cao Wei; in the 15th year of Jian'an, it belonged to Yidu County, which was changed from Linjiang county to Shu county.

In the Three Kingdoms, Yiling county was changed to Xiling County in the first year of Huangwu (222).

In the Western Jin Dynasty, the first year of Taikang (280), Xiling county was rebuilt as Yiling County, belonging to Yidu county.

In the southern and Northern Dynasties, both song and Qi were named Yiling County, belonging to Yidu county. The above-mentioned prefectures were all located in Yiling County; Yizhou was changed in Liang Dynasty, tuozhou in Western Wei Dynasty, and Shanzhou in Later Zhou Dynasty.

In the Sui Dynasty, in the third year of Daye (607), Yiling county was restored and Shanzhou was changed into Yiling county.

In the Tang Dynasty, in the second year of Wude (619), Yiling county was changed from Yiling county to Shanzhou. Both the prefecture and the county were in Yiling county.

In the Song Dynasty (1078-1085), Yiling county was changed from Shanzhou to xiazhou.

In the Yuan Dynasty, in the 17th year of the Yuan Dynasty (1280), it belonged to xiazhou Road, which was promoted by xiazhou. In 1364, Zhu Yuanzhang captured the county territory, abolished Yiling County, and changed xiazhou road into xiazhou capital; xuanjiang xiazhou capital was xiazhou, Zhili Huguang province.

In the Ming Dynasty, in 1376, xiazhou was changed to Yiling.

In the Qing Dynasty, in 1648, Yiling was changed to Yiling. In 1735, Yiling Prefecture was promoted to Yichang Prefecture, and Donghu county was established as Yiling county.

In the first year of the Republic of China (1912), Yichang Prefecture was abolished and Donghu county was changed into Yichang County, which successively belonged to jingyidao, the ninth administrative supervision district of Hubei Province and the sixth administrative supervision district of Hubei Province. On July 16, 1949, the Chinese people's Liberation Army liberated the county seat. Yichang city was set up in the county seat and its suburbs. Yichang county is subordinate to Yichang special district of Hubei Province, and the county organs are still set up in the city.

In July 1970, due to the construction of Gezhouba Water Control Project, the county authorities moved Xiaoxi tower from the city to the north.

In 1975, Yichang district was renamed Yichang District, and its subordinate relationship remained unchanged.

In March 1992, Yichang Prefecture and city merged, and Yichang county is a newly established Yichang city.

On March 22, 2001, the State Council approved the abolition of Yichang county and the establishment of Yiling District of Yichang city. On July 28, Yiling District was officially established.

geographical environment

Location context

Yiling District is located in the transition zone from western Hubei mountain to Jianghan Plain, on both sides of the Xiling Gorge of the Yangtze River, between 110 ° 51 '～ 111 ° 39', 30 ° 32 '～ 31 ° 28' n, with a maximum transverse distance of 71 km from east to west and 78 km from north to south, covering a total area of 3424 square kilometers. It is adjacent to Yuan'an county and Dangyang city in the East, Zhijiang City, Xiling District, Yidu city and Changyang Tujia Autonomous County in the south, Zigui County and Xingshan County in the West and Baokang County in the north.

details

geology

Yiling area is the composite part of the southern part of the third uplift belt of the first-order structure of Xinhua Xia system and the huaiyangshan type structural system. Huangling anticline is the core of the strata, from the inside to the outside, forming a multi-layer arc belt. Among them, the pre Sinian system is distributed in the west of Liantuo, Taipingxi, dengcun, xiabaoping and wuduhe areas; the Sinian system is distributed in the east of Liantuo, the southwest of sandauping, the East and south of xiabaoping, Jiushan, niuping, qingjiangping and zhanyingya areas; the Cambrian system is distributed from sandauping and Liantuo in the south to Xiaofeng, wuduhe and Zhangcunping in the north; the Ordovician system is distributed in the east of Liantuo and wuduhe The Silurian system is distributed in Jieling, Wangjiawan, luozhaping and Huanghua of Fenxiang; the Devonian system is distributed in dawangyan, dayankou, mayangshan, Gaochang, biejiadashan, beimashan and fengfenghe of the eastern part of the county; the Carboniferous system is distributed in Dashigou, xiaoshuichong, qiaozigou and gongjiachong of the eastern part of the county; the Permian system is distributed in Tianma, xiaoshuichong and mayangshan of the eastern part of the county It is distributed in the east of datiankeng, bailihuang and baijiaping; Triassic in the northeast of the county at the junction of Dangyang and Yuan'an; Jurassic in Chazhuang and meizuo in muduping; Cretaceous in yaqueling, Longquan and xiaoxita; Tertiary in Sanhe, Tongfan and duanjiazui of yaqueling; Quaternary in all the layers, it is the present The Holocene formation is the first terrace and floodplain on both sides of Lingxia and its tributaries in Jiangxi Province, and the late Pleistocene formation is the first and second terrace on both sides of the Yangtze River and its tributaries. The Cambrian and Sinian stratigraphic sections in the eastern part of Xiling Gorge, stretching about 5 kilometers from Liantuo and Shipai, are one of the three typical sections of Cambrian strata discovered and named by Li Siguang in 1920s, attracting the attention of the world geological circles; the geological investigation points of Ordovician and Silurian stratigraphic boundaries in Huanghua, Lianghekou, Fenxiang, Wangjiawan, pengjiayuan, etc., are also known as Li Siguang Discovered in 1920s, it is one of the three standard points in the world.

topographic features

The terrain of Yiling District is high in the northwest and low in the southeast, surrounded by mountains in the west, North and East, and facing the plain in the southeast. The highest point is 1962 meters above sea level, and the lowest point is 49.4 meters above sea level, with an elevation difference of 1912.6 meters. The formation of mountains, hills, valleys and other landforms. The terrain of the Northwest Mountainous area is highly incised, with dense hills and streams, which are mainly composed of Zhangcunping, wuduhe, xiabaoping, dengcun, Sandouping and other mountainous areas. The southeast hilly region is located in the transition zone between mountain and plain, mainly composed of yaqueling, Longquan, xiaoxita and other hilly land, with an altitude of less than 500 meters.

climate

Yiling District is a subtropical monsoon climate zone with four distinct seasons, mild climate and moderate rainfall. In spring, the temperature changes greatly, the alternation of cold and warm is frequent, and there is often cold weather in late spring; in summer, the climate changes greatly, hot at noon, cool in the morning and evening, and does not return to cool day and night in severe drought, with moderate rainfall and hot and rainy seasons, and there are often disastrous weather such as drought, waterlogging, wind and hail; in autumn, affected by the cold air in the north, the alternation of cold and warm occurs again, with fast cooling, less rain, more sunny days and crisp air; in winter, the temperature is high It falls fast, dry and has less rain and snow. The annual average temperature in the Three Gorges Valley is higher than that in other areas, followed by the low mountains and hills in the south, and the average temperature drops by 0.6 ℃ every 100 meters in the high and semi high mountains in the north; it is coldest in January and hottest in July, and the extreme maximum temperature in Xiaoxi tower is 41.4 ℃. The sunshine is more in summer and less in winter, with the spring and autumn in the middle. The annual rainfall ranges from 977 mm to 1370 mm. The Northwest Mountainous Area, the Three Gorges Valley and the south of the Yangtze River are the areas with the most rainfall, while yaqueling and Longquan are the areas with the least rainfall; the rainfall is the most in summer and the least in winter; the rainfall peak is in July. Most of them are southerly, the next is northeasterly, and the least is westerly. The annual average frost free period is 271.9 days. The first frost day is December 3 in xiaoxita, December 1 in Three Gorges area and November 15 in Zhangcunping. The last frost day is March 5 in xiaoxita, March 2 in Three Gorges area and April 5 in Zhangcunping. The average snowfall day is 8 days and snow cover day is 4.9 days. The earliest snowfall day of Xiaoxi tower is November 12 and the latest final snowfall day is April 7.

soil

The soil in Yiling area can be divided into 7 categories, 19

Chinese PinYin : Hu Bei Sheng Yi Chang Shi Yi Ling Qu