小基线集雷达干涉测量在无锡地面沉降监测中的应用
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摘要
地面沉降是无锡较为显著的地质灾害之一,严重影响了城市基础设施建设,限制了经济社会的可持续发展。合成孔径雷达干涉测量技术(InSAR)已成功应用于城市地表形变监测,并表现出极大的潜力和优势。基于ASAR、ALOS及COSMO数据,采用小基线集方法(SBAS)对2004-2012年间无锡的地表形变进行了监测研究。结果表明,沉降区域主要发生在江阴市南部及惠山区,最大累积沉降量超过-200mm。新吴区、滨湖区以及位于主城区的梁溪区出现了轻微的回弹现象,最大累积回弹量达到+40mm。与水准测量数据对比显示,干涉测量结果与水准观测数据具有很好的一致性。地下水水位变化仍然是无锡地表形变的主要影响因素。2005年地下水禁采任务完成后,无锡地面沉降有所减缓,但由于地下水恢复缓慢,所以沉降现象仍在发生。
Land subsidence is one of the most significant geological disasters in Wuxi,which seriously affects the construction of urban infrastructure and limits the sustainable development of economy and society. Synthetic aperture radar interferometry technology( InSAR) has been successfully applied to urban surface deformation monitoring and has shown great potential and advantages. Based on ASAR,ALOS and COSMO data,small baseline subset method( SBAS) is used to monitor the surface deformation of Wuxi. The results show that the subsidence mainly occurs in Jiangyin City and Huishan District,and the maximum cumulative subsidence during 2004-2012 is more than-200 mm. In Xinwu District,Binhu District and Liangxi District located in the main city,there is a slight rebound phenomenon,the maximum cumulative rebound is about + 40 mm. Compared with the leveling data,the synthetic aperture radar interferometry( InSAR) measurement results are in good agreement with the leveling data. The change of groundwater level is still the main influencing factor of surface deformation in Wuxi. After the prohibition of groundwater exploitation in 2005,the land subsidence has slowed down,but it is still occurring due to the slow recovery of groundwater.
Land subsidence is one of the most significant geological disasters in Wuxi,which seriously affects the construction of urban infrastructure and limits the sustainable development of economy and society. Synthetic aperture radar interferometry technology( InSAR) has been successfully applied to urban surface deformation monitoring and has shown great potential and advantages. Based on ASAR,ALOS and COSMO data,small baseline subset method( SBAS) is used to monitor the surface deformation of Wuxi. The results show that the subsidence mainly occurs in Jiangyin City and Huishan District,and the maximum cumulative subsidence during 2004-2012 is more than-200 mm. In Xinwu District,Binhu District and Liangxi District located in the main city,there is a slight rebound phenomenon,the maximum cumulative rebound is about + 40 mm. Compared with the leveling data,the synthetic aperture radar interferometry( InSAR) measurement results are in good agreement with the leveling data. The change of groundwater level is still the main influencing factor of surface deformation in Wuxi. After the prohibition of groundwater exploitation in 2005,the land subsidence has slowed down,but it is still occurring due to the slow recovery of groundwater.
引文
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[3]薛禹群,张云.长江三角洲南部地面沉降与地裂缝[J].华东地质,2016,37(1):1-9
[4]段光耀,刘欢欢,宫辉力,等.京津城际铁路沿线不均匀地面沉降演化特征[J].武汉大学学报(信息科学版),2017(12):1847-1853
[5]臧妻斌,黄腾,郭献涛.基于DIn SAR技术的意大利拉奎拉同震形变研究[J].河南理工大学学报(自然科学版),2017,36(1):52-57
[6]尹宏杰,王平.基于L波段DIn SAR的矿区形变研究[J].工程勘察,2017,45(2):64-67
[7]廖明生,裴媛媛,王寒梅,等.永久散射体雷达干涉技术监测上海地面沉降[J].上海国土资源,2012,33(3):5-10
[8] Ferretti A,Prati C,Rocca F. Permanent scatterers in SAR interferometry[J]. IEEE Transactions on Geoscience and Remote Sensing,2001,39(1):8-20
[9] Berardino P,Fornaro G,Lanari R,et al. A new algorithm for surface deformation monitoring based on small baseline differential SAR interferograms[J]. IEEE Transactions on Geoscience and Remote Sensing,2002,40(11):2375-2383
[10]周朝栋,宮辉力,张有全,等.北京平原区地面沉降PS-InSAR监测[J].遥感信息,2017,32(1):17-22
[11]朱猛,董少春,尹宏伟,等.基于SBAS In SAR方法的苏州地区2007-2010年地表形变时空变化研究[J].地球信息科学学报,2016,18(10):1418-1427
[12]郭乐萍,岳建平,岳顺. SBAS技术在南京河西地表沉降监测中的应用[J].测绘通报,2017(3):26-28
[13]于军,束龙仓,温忠辉,等.锡西—澄南典型地面沉降区地面沉降风险评价[J].地质学刊,2012,36(1):74-79
[14]武健强,吴曙亮,闵望,等.苏锡常地区地面沉降防控最新进展评述[J].地质学刊,2014,38(2):319-323
[15]胡建平.苏锡常地区地下水禁采后的地面沉降效应研究:[博士学位论文][D].南京:南京大学地球科学与工程学院,2011
[16]施小清,冯志祥,姚炳奎,等.苏锡常地区深层地下水禁采后土层变形特征分析[J].第四纪研究,2014,34(5):1062-1071
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