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采用PS-DInSAR技术对覆盖盐城市的10幅ENVISAT ASAR数据进行处理,得到盐城市2003—2007年地面沉降分布图。通过对沉降结果的时空分析,指出盐城市地面沉降以串场河为界分为盐都区和盐城市区两个局部沉降区。相对于盐城市区,盐都区在沉降,且沉降速率在加大,初步分析认为这是由盐都区城市建设加快,大量抽取地下水导致的。
The 10 ENVISAT ASAR data covering Yancheng City were processed by using PS-DInSAR technology, and the land subsidence distribution map of Yancheng from 2003 to 2007 was obtained. Through the spatial and temporal analysis of the settlement results, it is pointed out that the land subsidence in Yancheng City is divided into two subsidence areas of Yandu District and Yancheng City by using the Changchang River as a boundary. Compared with Yancheng, Yandu area is settling down and settlement rate is increasing. Preliminary analysis shows that it is caused by the urban construction in Yandu District being accelerated and large amount of groundwater being drained.