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一、前言上海位于东海之滨,长江三角洲南缘,是我国最大的工业城市。四季气温变化显著,冬夏温差30℃左右。地势平坦,地面高程不满四米。黄浦江自南而北纵贯市区,全长113公里,至吴淞入长江,苏州河源自江苏,东流至上海入黄浦江。 1921年开始发现上海地面有下沉现象。1938年在静安、黄浦两区测量,发现年平均
I. Introduction Shanghai is located in the East China Sea coast, the southern margin of the Yangtze River Delta, China’s largest industrial city. Four seasons temperature changes significantly, temperature difference between winter and summer about 30 ℃. Flat terrain, the ground elevation of less than four meters. The Huangpu River runs through the urban area from south to north with a total length of 113 kilometers and flows into Wusong into the Yangtze River. The Suzhou River originates from Jiangsu and flows eastward into Shanghai into the Huangpu River. 1921 began to find the ground in Shanghai sinking phenomenon. In 1938 in Jing’an, Huangpu two districts measured and found that the average