基于InSAR技术对苏州主城区的地面沉降进行监测

Based on InSAR Technology Monitor the Land Subsidence in the Main City of Suzhou

城市地表沉降对于人类的生活影响越来越严重,因此,获取精确的地表沉降监测数据尤为重要。采用SBAS与PS 2种技术以覆盖苏州主城区的33景Sentinel-1A影像为数据,分别得到了该地区的平均沉降速率,并对典型沉降地区的沉降形成原因及特点进行分析。结果表明,该地区存在不均匀沉降,沉降主要发生在虎丘区和吴江区,年最大沉降速率为-39.1 mm/a。最后对2种技术的形变结果进行对比分析,得到2种技术结果具有高度一致性,证明了2种技术都可获得可靠的结果。

Accurate monitoring data of land subsidence is particularly important due to the increasing severity of its impact on human life.By using 33 Sentinel-1A images covering the main urban area of Suzhou as data and applying SBAS and PS technology,the average subsidence rate of this area was obtained,and the causes and characteristics of subsidence in typical subsidence areas were ana-lyzed.It was found that subsidence in this area is non-uniform,with the subsidence mainly occur-ring in Huqiu District and Wujiang District,and an annual maximum subsidence rate of-39.1 mm/a was observed.Finally,the deformation results of the two techniques were compared and analyzed,showing that reliable results can be obtained using both techniques as their deformation results were highly consistent.