![](https://web.archive.org/web/20091118155042im_/http://upload.wikimedia.org/wikipedia/commons/thumb/6/67/Shanghai_121.45796E_31.22234N.jpg/180px-Shanghai_121.45796E_31.22234N.jpg)
There are several islands of Shanghai governed by Shanghai city, including three larger inhabited ones and a number of uninhabited. They are alluvial islands in the Yangtze River Delta in China.
Chongming Island lies against the northern shore of the Yangtze River and is an alluvial island formed by silt carried along the river. It gives the name to Chongming County, the only county of Shanghai. It is the third largest island in greater China at 1,041.21 km2 (402.01 sq mi). The other two inhabited Shanghai islands are Changxing Island at 88.54 km2 (34.19 sq mi), and Hengsha Island at 55.74 km2 (21.52 sq mi).[1]. The 25.5 km (15.8 mi) Chongming Island Bridge-tunnel joining the island to Shanghai opened on 2009-10-31[2]
Jiuduansha Island (31º03'N~-31º17'N; 121º46'E-122º15'E, area: 423.2 sq. km above -6 m, 114.6 sq. km at the elevation of the sea level) has the national nature reserve, Jiuduansha Wetland. [3] It is an intertidal wetland which consists of three parts, Shangsha, Zhongsha and Xiasha.[4]
Dajinshan Island (Big Jinshan Island), Xiaojinshan Island (Small Jinshan Island), and Fushan Island in Jinshan District are nature reserves under city jurisdiction.[5] Dajinshan has the highest point in Shanghai with an altitude of 103.4 m.
Some alluvial islands are relatively young and the number varies over time. For example, Jiuduansha emerged in the 1950s. In 2006, the city had 19 uninhabited islands covering 226.27 square kilometers, with a total coastline length of 309 kilometers.[5]
References
Coordinates: 31°39′43″N 121°28′41″E / 31.66194°N 121.47806°E