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| Geography of Jiangsu | |
|---|---|
| Name | Jiangsu |
| Native name | 江苏省 |
| Settlement type | Province |
| Coordinates | 32°53′N 119°46′E |
| Subdivision type | Country |
| Subdivision name | People's Republic of China |
| Capital | Nanjing |
| Area total km2 | 102600 |
| Population total | 80,000,000 |
Geography of Jiangsu Jiangsu Province occupies a low-lying coastal plain on the east coast of the People's Republic of China, bordered by the Yellow Sea, the Yangtze River, and neighboring provinces such as Shandong, Anhui, and Zhejiang. Its position within the Yangtze River Delta, proximity to the Bohai Sea, and historical role in regional trade link it to cities like Shanghai, Suzhou, Wuxi, and Nanjing. Major transport corridors such as the Beijing–Shanghai Railway, the Yangtze River Economic Belt, and the Yangtze River Delta Economic Zone shape its geography and development.
Jiangsu lies on the eastern seaboard of the People's Republic of China between latitudes 30°46′–35°08′N and longitudes 116°21′–121°57′E, sharing land borders with Shandong, Anhui, and Zhejiang and a maritime boundary along the Yellow Sea and the East China Sea. The provincial capital, Nanjing, anchors the upper-Yangtze River corridor while the deltaic city cluster including Shanghai, Suzhou, and Wuxi marks the province's eastern margin along the Yangtze River Delta and the Hangzhou Bay approaches.
Jiangsu's topography transitions from the lower reaches of the Yangtze River and the Huai River floodplains in the west and center to a flat coastal plain and extensive tidal flats along the Yellow Sea and the East China Sea in the east. Notable landforms include the Yangtze River Delta, the Nantong tidal zones, the Taihu Lake basin near Suzhou and Wuxi, and relic hills such as Yushan and the Zhangjiagang low hills formed by ancient fluvial deposits. Man-made landforms from reclamation projects around Dongtai and Rudong County extend the coastline and create poldered agricultural tracts.
Jiangsu has a humid subtropical to warm temperate climate influenced by the East Asian Monsoon, with hot, humid summers under the influence of the Western Pacific Typhoon corridor and cold, damp winters affected by the Siberian High. Seasonal rainfall is concentrated during the Meiyu (plum rains) front and the summer monsoon, while extreme weather events such as Typhoon Saomai and Typhoon Lekima have impacted coastal counties and port cities like Lianyungang and Nantong. Climatic gradients from north to south produce variations between the climates of Xuzhou, Yangzhou, and Nanjing.
The province is crisscrossed by major waterways including the lower Yangtze River, the Grand Canal corridor linking Beijing to Hangzhou, and the Huai River basin, making Jiangsu central to inland navigation, flood control, and water diversion projects such as the South–North Water Transfer Project. Key hydraulic structures include sluices and levees in the Yangtze River Delta near Nanjing and Zhenjiang, the South-to-North Water Diversion Project infrastructure passing through the province, and the extensive drainage networks feeding Taihu Lake and the Xugong reclamation works. Historic floods like the 1931 China floods influenced subsequent floodplain management, while modern initiatives link provincial water policy to the Yangtze River Protection Law and national water resource planning.
Jiangsu's fertile alluvial soils support intensive rice, wheat, and rapeseed agriculture in counties such as Suqian, Huai'an, and Lianyungang, while the Taihu Plain around Suzhou and Wuxi favors horticulture and aquaculture, especially freshwater fish and shrimp that supply markets in Shanghai and Nanjing. Mineral resources are limited but include salt pans along the coast near Yancheng and industrial-grade clays in the Zhenjiang area supporting ceramics industries tied to Jiangnan craft traditions. Rapid urbanization in cities like Nanjing, Suzhou, and Changzhou has converted farmland to manufacturing zones linked to clusters such as the Yangtze River Delta Economic Zone and ports like Nantong Port and Lianyungang Port.
Coastal wetlands, tidal flats, and inland lakes such as Taihu and the Yancheng Wetlands support migratory bird species including populations of the Oriental Stork and stopover sites for birds on the East Asian–Australasian Flyway near Yancheng National Nature Reserve. Freshwater ecosystems in the Yangtze River and Huai River basins host endemic fish and invertebrates, while remnant riparian forests and Jiangnan-style gardens in Suzhou preserve pockets of biodiversity alongside urban landscapes influenced by historical sites like Ming Xiaoling Mausoleum. Conservation areas respond to pressures from invasive species, eutrophication in Taihu Lake, and habitat loss due to reclamation and industrial expansion.
Jiangsu contains one of China's most dense and industrialized population clusters centered on the Yangtze River Delta megaregion encompassing Nanjing, Suzhou, Wuxi, Changzhou, and the periphery of Shanghai, linked by high-speed railways such as the Beijing–Shanghai High-Speed Railway and expressways that underpin the Yangtze River Delta Economic Zone. Urban districts like Gulou District, Nanjing and Wuzhong District exemplify mixed residential, technological, and cultural land use patterns tied to institutions such as Nanjing University, Soochow University, and industrial parks connected to multinational firms operating in Suzhou Industrial Park and Nantong Economic and Technological Development Zone. Rural-to-urban migration, peri-urban expansion, and integrated transport corridors continue to reshape demographic distribution and spatial planning across counties such as Gaoyou and Jintan.