利用InSAR识别与监测黑方台黄土滑坡
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摘要
针对甘肃永靖县的黑方台地区滑坡不断对当地居民人身及财产安全构成重大威胁的现状,该文选取高分辨率的升降轨TerraSAR数据、3m分辨率的DEM数据和30m分辨率的SRTM DEM数据,利用InSAR技术对该地区的地表形变进行监测,主要结果如下:用Stacking技术获取了黑方台的形变速率图,识别出14处不稳定滑坡体;用SBAS-InSAR技术对典型滑坡体进行时间序列监测,将InSAR结果投影到滑坡方向与已有的GPS结果进行比较,最大较差为6mm,最大中误差为3mm。结果表明,InSAR技术用来识别与监测黄土滑坡方便可靠,并且精度较高。
Landslide in the Heifangtai area of Yongjing County,Gansu Province,had been posed a serious threat to the safety of the people and property of local residents,TerraSAR data,two resolution DEM data including three-meter UAV DEM and thirty-meter SRTM DEM were chosen to analyze the surface deformation in Heifangtai area,finally 14 unstable landslides were identified from stacking InSAR and time-series deformation results over one typical landslide were retrieved by using SBAS-InSAR technology based on ascending and descending TerraSAR data.The results from InSAR were projected to the landslide direction and compared with the existing GPS results.the maximum difference was 6 mm,and the maximum root mean square error(RM_SE)was 3 mm.The conclusion showed that InSAR technology was convenient and reliable for identifying and monitoring loess landslides,and had high precision.
Landslide in the Heifangtai area of Yongjing County,Gansu Province,had been posed a serious threat to the safety of the people and property of local residents,TerraSAR data,two resolution DEM data including three-meter UAV DEM and thirty-meter SRTM DEM were chosen to analyze the surface deformation in Heifangtai area,finally 14 unstable landslides were identified from stacking InSAR and time-series deformation results over one typical landslide were retrieved by using SBAS-InSAR technology based on ascending and descending TerraSAR data.The results from InSAR were projected to the landslide direction and compared with the existing GPS results.the maximum difference was 6 mm,and the maximum root mean square error(RM_SE)was 3 mm.The conclusion showed that InSAR technology was convenient and reliable for identifying and monitoring loess landslides,and had high precision.
引文
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[14]ZHANG L,DING X,LU Z.Modeling PSInSAR time series without phase unwrapping[J].IEEE Transactions on Geoscience &Remote Sensing,2011,49(1):547-556.
[15]SANDWELL D T,PRICE E J.Phase gradient approach to stacking interferograms[J].Journal of Geophysical Research Solid Earth,1998,103(B12):30183-30204.
[16]CHEN C W.ZEBKER H A.Two-dimensional phase unwrapping with use of statistical models for cost functions in nonlinear optimization[J].Journal of the Optical Society of America B-Optical Physics,2001,18(2):338-351.
[17]亓星,许强,彭大雷,等.地下水诱发渐进后退式黄土滑坡成因机理研究:以甘肃黑方台灌溉型黄土滑坡为例[J].工程地质学报,2017,25(1):147-153.(QI Xing,XU Qiang,PENG Dalei,et al.Mechanism of gradual retreat loess landslide caused by ground water:a case study of the irrigation loess landslide in Heifangtai,Gansu province[J].Journal of Engineering Geology,2017,25(1):147-153.)
[18]许强,彭大雷,亓星,等.2015年4.29甘肃黑方台党川2#滑坡基本特征与成因机理研究[J].工程地质学报,2016,24(2):167-180.(XU Qiang,PENG Dalei,QI Xing,et al.Dangchuan 2#landslide of April 29,2015in Heifangtai area of Gansu Province:characteristics and failure mechanism[J].Journal of Engineering Geology,2016,24(2):167-180.)
[2]ZHOU Y F,THAM L G,YAN R W M,et al.The mechanism of soil failures along cracks subjected to water infiltration[J].Computers &Geotechnics,2014,55(2):330-341.
[3]XU L,DAI F C,GONG Q M,et al.Irrigation-induced loess flow failure in Heifangtai Platform,North-West China[J].Environmental Earth Sciences,2012,66(6):1707-1713.
[4]黄润秋.20世纪以来中国的大型滑坡及其发生机制[J].岩石力学与工程学报,2007,26(3):433-454.(HUANG Runqiu.Large-scale landslides and their sliding mechanisms in China since the 20th Century[J].Chinese Journal of Rock Mechanics and Engineering,2007,26(3):433-454.)
[5]蔺晓燕,李同录,赵纪飞,等.甘肃黑方台黄土固结-渗透特性试验研究[J].水文地质工程地质,2014,41(1):41-47.(LIN Xiaoyan,LI Tonglu,ZHAO Jifei,et al.Permeability characteristics of loess under different consolidation pressures in the Heifangtai platform[J].Hydrogeology &Engineering Geology,2014,41(1):41-47.)
[6]彭建兵,林鸿州,王启耀,等.黄土地质灾害研究中的关键问题与创新思路[J].工程地质学报,2014,22(4):684-691.(PENG Jianbing,LIN Hongzhou,WANG Qiyao,et al.The critical issues and creative concepts in mitigation research of loess geological hazards[J].Journal of Engineering Geology,2014,22(4):684-691.)
[7]许领,戴福初,邝国麟,等.黑方台黄土滑坡类型与发育规律[J].山地学报,2008,26(3):364-371.(XU Ling,DAI Fuchu,KUANG Guolin,et al.Types and characteristics of loess landslides at Heifangtai loess plateau,China[J].Journal of Mountain Science,2008,26(3):364-371.)
[8]王家鼎.高速黄土滑坡的一种机理:饱和黄土需动液化[J].地质论评,1992,38(6):532-539.(WANG Jiading.A mechanism of high speed loess landslide-saturated liquefaction[J].Geological Review,1992,38(6):532-539.)
[9]武彩霞,许领,戴福初,等.黑方台黄土泥流滑坡及发生机制研究[J].岩土力学,2011,32(6):1767-1773.(WU Caixia,XU Ling,DAI Fuchu,et al.Topographic features and initiation of earth flows on Heifangtai loess plateau[J].Rock and Soil Mechanics,2011,32(6):1767-1773.)
[10]张茂省.引水灌区黄土地质灾害成因机制与防控技术:以黄河三峡库区甘肃黑方台移民灌区为例[J].地质通报,2013,32(6):833-839.(ZHANG Maosheng.Formation mechanism as well as prevention and controlling techniques of loess geo-hazards in irrigated areas:a case study of Heifangtai immigration area in the Three Gorges Reservoir of the Yellow River[J].Geological Bulletin of China,2013,32(6):833-839.)
[11]何杨,赵超英,张勤,等.陕西泾阳南塬杏园滑坡InSAR监测分析[J].工程勘察,2016,44(6):51-54.(HE Yang,ZHAO Chaoying,ZHANG Qin,et al.Xingyuan landslide monitoring with InSAR technique in Southern Jingyang platform,Shaanxi[J].Geotechnical Investigation &Surveying,2016,44(6):51-54.)
[12]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 &Remote Sensing,2002,40(11):2375-2383.
[13]FERRETTI A,PRATI C,ROCCA F.Permanent scatterers in SAR interferometry[J].IEEE Transactions on Geoscience &Remote Sensing,2001,39(1):8-20.
[14]ZHANG L,DING X,LU Z.Modeling PSInSAR time series without phase unwrapping[J].IEEE Transactions on Geoscience &Remote Sensing,2011,49(1):547-556.
[15]SANDWELL D T,PRICE E J.Phase gradient approach to stacking interferograms[J].Journal of Geophysical Research Solid Earth,1998,103(B12):30183-30204.
[16]CHEN C W.ZEBKER H A.Two-dimensional phase unwrapping with use of statistical models for cost functions in nonlinear optimization[J].Journal of the Optical Society of America B-Optical Physics,2001,18(2):338-351.
[17]亓星,许强,彭大雷,等.地下水诱发渐进后退式黄土滑坡成因机理研究:以甘肃黑方台灌溉型黄土滑坡为例[J].工程地质学报,2017,25(1):147-153.(QI Xing,XU Qiang,PENG Dalei,et al.Mechanism of gradual retreat loess landslide caused by ground water:a case study of the irrigation loess landslide in Heifangtai,Gansu province[J].Journal of Engineering Geology,2017,25(1):147-153.)
[18]许强,彭大雷,亓星,等.2015年4.29甘肃黑方台党川2#滑坡基本特征与成因机理研究[J].工程地质学报,2016,24(2):167-180.(XU Qiang,PENG Dalei,QI Xing,et al.Dangchuan 2#landslide of April 29,2015in Heifangtai area of Gansu Province:characteristics and failure mechanism[J].Journal of Engineering Geology,2016,24(2):167-180.)
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