宁波地面沉降的短基线集监测与分析

针对传统地面沉降监测手段精度高,但监测周期长、空间分辨率低、人力物力耗费大等问题,该文基于短基线集时序分析技术提取了宁波地区的地表形变信息。首先根据短基线集技术监测结果分析了宁波地区地面沉降分布特征,然后对宁波东部新城的沉降进行了精细化分析,并给出了其沉降原因。结果表明:宁波地区地面沉降整体呈现弱发育特征,部分地区存在轻微地面隆起现象,东部新城地面沉降呈现中度发育特征,并存在不均匀沉降现象,快速的城市化建设是东部新城地面沉降的主要原因。

Monitoring and analysis of land subsidence in Ningbo based on small baseline subset

Aiming at the problem that the precision of traditional monitoring method of land subsidence is higher,but there are many defects such as long monitoring period,low spatial resolution and costing more human and material resources,the surface deformation information of Ningbo area was extracted based on small baseline subset(SBAS)time series analysis technique in this paper.Firstly,according to the monitoring result of small baseline subset technique,the distribution characteristics of land subsidence was analyzed in Ningbo area,then refinement analysis of the land subsidence in the eastern new town of Ningbo was made,and reasons for land subsidence were given.The results showed that the land subsidence in Ningbo area was weakly developed,some areas had slight land uplift phenomenon,the land subsidence in the eastern new town of Ningbo presented moderate developmentand uneven subsidence.The rapid urbanization is the main cause of land subsidence in the eastern new town of Ningbo.