Jiading District, Shanghai Municipality

Jiading District Jiading District, belonging to Shanghai, is located in the northwest of Shanghai. Its center is 121 ° 26 'e and 31 ° 39' n. It borders Baoshan and Putuo districts in the East, Kunshan City in Jiangsu Province in the west, Wusong River in the south, Minhang, Changning and Qingpu districts, and Liuhe River in the north, Taicang City in Jiangsu Province. The total area is 463.55 square kilometers.

Jiading District is flat, slightly higher in the northeast and slightly lower in the southwest. Wenzaobang River, Lianqi River and Loutang river lie in the East and West, and flow eastward through Baoshan District to reach the Yangtze River and Huangpu River; yantietang River, Hengli River and xinchapu River (Luowen River) run through the north and south, and connect with Wusong River and Liuhe river. 71%. The total length of the river is more than 1800 kilometers, and the average river network density is 4.12 kilometers per square kilometer.

In 2018, Jiading District has three streets, seven towns, a management committee and an industrial zone, with a permanent resident population of 1.5889 million, and a GDP of 236.27 billion yuan, including 160.95 billion yuan in the secondary industry, with a comparable growth of 4.5%, 75 billion yuan in the tertiary industry, and 0.1:68.1:31.8 in the tertiary industrial structure. The second batch of national agricultural product quality and safety counties. On October 20, 2020, it will be included in the list of national double support model cities (counties).

Historical evolution

In the Tang Dynasty, there was an urban and rural area of Kunshan County in Jiading, so Jiading was also called "Wancheng" or "Wancheng". Jiading District was formerly known as Jiading County.

In the Qin Dynasty, it belonged to Lou County of Kuaiji County, and in the Sui and Tang Dynasties, it belonged to Kunshan County of Suzhou. Jiading County was set up in 1217, the tenth year of ningzong in Southern Song Dynasty. The county office was set up in Lianqi city (now Jiading town).

When the county was established, Chunshen Township received 6 capitals, Linjiang Township received 8 capitals, Anting Township received 6 capitals, Pingle Township received 4 capitals, and Xitang Township received 3 capitals, a total of 27 capitals. Duling district (distinguish the main and auxiliary fan and the upper and lower part of the middle), district collar map, map collar polder. Chunyou years, Chunshen Township changed its name to trustworthy, Linjiang Township changed its name to Yiren, Anting Township changed its name to Fuli, Pingle Township changed its name to Xuyi, and Xitang Township changed its name to Lezhi.

In the Yuan Dynasty, the state was established in the second year of Yuanzhen (1296).

In the Ming Dynasty, the county was rebuilt in 1369. In the tenth year of Hongzhi (1497), the northwest of the county was subordinate to Taicang Prefecture, with 24 capitals and 668 maps.

In the first year of Hongguang (1645) of the Southern Ming Dynasty, after the Qing army conquered Jiading, Li Chengdong, the general of the Qing army, ordered three massacres of civilians in the city. At least 20000 people died, which is known as "Jiading three massacres".

In 1724, Baoshan county was set up in the East. There are 349 pictures in 15 cities. In the tenth year of Kangxi (1671), Zhao Xin, the county magistrate, provided disaster relief and set up porridge factories in four townships. In the 11th year of Jiaqing (1806), Wuhuan county magistrate set up 31 congee factories for disaster relief. After that, the local administrative affairs were managed by factories instead of townships. At the end of the reign of Emperor Guangxu (1908), the county was divided into one district and 33 factories. In the first year of Xuantong (1909), in order to hold local autonomy, the factory was renamed Township, and the Wuxing factory was renamed Wuxiang township.

On August 13, 1937, the Japanese army provoked a war of aggression in Shanghai, and the Chinese Army rose up to resist. The August 13 war broke out.

In 1958, Jiading was transferred from Jiangsu Province to Shanghai.

In 1992, the county was divided into districts.

administrative division

By 2018, Jiading District has three streets, seven towns, one management committee and one industrial zone. Jiading District People's Government in Xincheng Road street.

geographical environment

Location context

Jiading District is located in the northwest of Shanghai, with its center at 31 ° 23 ′ N and 121 ° 15 ′ E. It borders Baoshan and Putuo districts in the East, Kunshan City in Jiangsu Province in the west, Wusong River (Suzhou River) in the south, Minhang, Changning and Qingpu districts, and Liuhe River in the north, Taicang City in Jiangsu Province. The total area is 458.8 square kilometers. The total length of administrative boundary is 167.8461 km.

topographic features

In Jiading District, there are accumulation landforms. According to its genesis and development age, it can be divided into three units and five geomorphic types.

1、 Lacustrine plain

It is distributed in the west of the area, with a width of 4 km in the northwest direction, covering an area of 29.34 square kilometers, accounting for 6.01% of the total area of the county. It is mainly composed of fluvial and lacustrine sediments, which are brown gray muddy clay, abundant in terrestrial microfossils, ostracods and freshwater molluscs, and rich in plant debris. The thickness is about 3 meters, the terrain is low and flat, and the altitude is 3.4-3.6 meters.

2、 Coastal plain

It can be divided into early coastal plain and late coastal plain. It covers an area of 394.44 square kilometers. Accounting for 80.84% of the total area.

1. The early coastal plain is distributed in the "Gangshen" area, with a width of 3.6 kilometers and an area of 208.64 square kilometers, accounting for 42.76% of the total area. In addition to the sand bank, the main sediments are brown yellow loam or loam mixed with silt, containing more marine microfauna. Foraminifera, ostracods of transitional facies between sea and land, mollusk fossils, etc. The thickness is 2.5-5 meters, and the altitude is 3.6-4.1 meters.

The western boundary is consistent with the Huangdu sand belt and the coastline 6500 years ago; the eastern boundary is consistent with the Shigang sand dike and the coastline 4000 years ago. There are also Waigang Fangtai sand dike and Qinggang sand dike. The sand dykes are NW trending, buried 0.5m deep, intermittently distributed, about 10 km long and varying in width and thickness.

2. The late coastal plain is mainly composed of the sediment carried into the sea by the Yangtze River and deposited by sea tide. It is distributed to the east of the early coastal plain, about 10 km wide in the north and 5 km wide in the south. It covers an area of 185.80 square kilometers, accounting for 38.08% of the total area. The sediments are mainly brown yellow loam, containing more marine foraminifera and Ostracoda fossils in the transitional facies between sea and land. It is 2.5-5m thick. The altitude is 3.8-4.2 meters.

3、 Alluvial plain

It is divided into Liuhe alluvial plain and Wusong River alluvial plain. It covers an area of 64.15 square kilometers. 15% of the total area.

Liuhe alluvial plain

It is distributed in the South Bank of Liuhe River in the north of Jiading, with a 1.4 km wide ne belt. The sediments are mainly brown yellow sub sand mixed with silty fine sand. The altitude is 3.3-3.8m.

Wusong River alluvial plain

It is distributed in the North Bank of Wusong River in the south of Jiading, with a width of 2 km and nearly east-west direction. The sediments are mainly brown yellow sandy loam mixed with silty fine sand. The altitude is 3.5-4.2m.

climatic conditions

Jiading District is located in the northern edge of the north subtropical zone, where the southeast monsoon prevails. It is hot in the same season, with abundant precipitation, warm and humid climate, moderate light and temperature, and sufficient sunshine. According to the meteorological data of Jiading County meteorological station from 1959 to 1987, the average annual temperature is 15.4 ℃; the average annual rainfall is 1077.6 mm, the rainy days are 130.2 days; the average annual sunshine is 2114.8 hours, the average annual total solar radiation is 114.5 kcal / cm2; the average annual frost free days are 223 days.

General situation of hydrology

Jiading District belongs to Huangpu River system of Taihu district. Wusong River in the South and Liuhe River in the north are the discharge channels formed by natural erosion in the process of land formation inside and outside the "Gangshen" in Jiading. They both inherit the water system of Taihu Lake and flow eastward through Baoshan county to Huangpu River or Yangtze River. According to the flow direction of the river, it is basically divided into east-west direction and south-north direction. The main rivers in the east-west direction are wenzaobang River, Lianqi River and Loutang River, and the main rivers in the north-south direction are Yantie River, Hengli River and xinchapu River, all connecting Wusong River and Liuhe river.

Jiading District is a tidal area of plain river network, with an average River density of 6.75 km per square kilometer. In the northeast of the county, the density is relatively high; in the south, the density is relatively sparse from the south of wenzaobang. In addition to Wusong River and Liuhe river, there are 15 artificial rivers. Among them, 6 main rivers, with a total length of 138.43 km, and 9 main rivers, with a total length of 93.92 km, are located between the main rivers. There are 92 main rivers in rural areas, with a total length of 370.62 km. There are more than 100 Rural tributaries besides the rural trunk river. The main and branch rivers are connected to form a network. There are sluices at both ends of the main river to resist the flood and the invasion of the sea tide.

natural resources

water resource

The surface runoff of Jiading is 188 million cubic meters in wet year and 46 million cubic meters in dry year. The surface runoff from June to September is more abundant than that in other months.

From top to bottom, Jiading groundwater can be divided into one phreatic aquifer and five confined aquifers with different depths.

Phreatic aquifer is widely distributed in Jiading, with a total amount of about 13600 cubic meters per year. The buried depth is 1-3m and the thickness is 4-12m. The buried depth of diving level is 0.5-1.5m. The first confined aquifer is only developed in the west of the county. The top buried depth is 20-40 meters, the bottom buried depth is 27-50 meters, and the thickness is 4-15 meters. The water quantity is small, the water quality is poor (salt water), and the distribution is unstable. The water temperature is about 20 ℃. The total water content of the second confined aquifer is 9.822 million cubic meters per year. The buried depth of the roof is 55-75m, the buried depth of the floor is 95-115m, and the layer thickness is 25-50m. It is rich in water. The water temperature is 19 ℃ - 20 ℃. The total water content of the third confined aquifer is 6.251 million cubic meters per year. The buried depth of roof is 110-125m, the buried depth of floor is 130-150m, and the layer thickness is 6-35m. The water temperature is 20 ℃ - 22 ℃. The total water content of the fourth confined aquifer is 10.015 million cubic meters per year. There are two aquifers: the upper roof is 155-184m deep, the bottom is 165-206 m deep, and the layer thickness is 8-22 m; the lower roof is 219-233 m deep, the bottom is 227-247 m deep, and the layer thickness is 8-14 M. The water temperature is 22 ℃ - 25 ℃. The total water content of the fifth confined aquifer is 52