Shanghai is a part of the alluvial plain in the Yangtze River Delta, with an average elevation of about 2. 19 meters. The highest altitude is Dajinshan Island in Hangzhou Bay, Jinshan District, with an altitude of 103.70 meters.

There are relics of tianmashan, Xue Shan and Phoenix Mountain in the west, and tianmashan is the highest point on the land, with an altitude of 99.8 meters. There is a stone tablet "the top of Sheshan". There are rock islands such as Dajinshan, Xiaojinshan, Fushan (Guishan), Sheshan Island and Xiaoyangshan Island in the sea area.

Extended data

Shanghai is located in the south of the Yangtze River, at the mouth of the Yangtze River, and not in the main earthquake zone, so earthquakes, floods and geological disasters rarely occur, but it is vulnerable to the threat of tsunami because of its proximity to the sea and low altitude.

There are many rivers in Shanghai, which used to be a land of plenty. The islands on the east side of the mainland have large areas of wetlands and tidal flats, which are important habitats for migratory birds and important ecological barriers in Shanghai. Because it is located on the southeast coast and on the path of typhoons in the western Pacific, tropical cyclones (typhoons) from the Pacific often pass through or affect it every summer and early autumn, causing strong winds, high tides and heavy rains.

In addition, Shanghai is located in the alluvial plain of the Yangtze River estuary and belongs to soft soil foundation. Over-exploitation of groundwater and construction of high-rise buildings and underground facilities lead to land subsidence.

Baidu Encyclopedia-Shanghai