基于InSAR技术的盘锦地区地面沉降研究

Monitoring land subsidence in Panjin area based on In SAR method

为掌握盘锦地区地面沉降现状,包括沉降中心位置、沉降区面积、沉降量、沉降速率等,选取2013-2016年覆盖研究区的19期C波段Radasat-2数据,采用SBAS-InSAR技术提取盘锦地区地面沉降速率和累积地面沉降量。结果表明,研究区内存在两个沉降区:曙四联沉降区,面积约为43.6km^2,最大沉降速率为-151.49mm/a;龙王村沉降区,面积约为33.28km^2,最大沉降速率为-119.55mm/a。与2007-2009年的3期ASAR数据得到的结果进行对比后发现,两者得到的沉降区基本一致。通过地面沉降监测数据的时序分析,累积沉降量和沉降区范围均随着时间不断增大。

To grasp the current situation of land subsidence in Panjin area (including the land subsidence center, settlement area, cumulative settlement and settlement rate and so on), the 19 Radasat- 2 data of C band covering the study area during 2013- 2016 was selected, the land subsidence rate and cumulative amount of land subsidence in Panjin area were extracted using SBAS- InSAR method. The results show that there are two land subsidence centers in the study area, one is Shusilian subsidence area, with an area of about 43.6 km^2, the highest settlement rate of which is -151.49 mm/a. The other is Longwang village subsidence area, with an area of about 33.28 km^2, the highest settlement rate of which is -119.55 mm/a. Comparing these results with the results of three ASAR data during 2007 to 2009, it is found that the subsidence area are basically the same. Through the time series analysis of ground subsidence, the cumulative settlement and the range of settlement area are all increasing with time.