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Loess landslide type and sliding mode analysis method based on insar multi-dimensional deformation information

A technology of sliding mode and analysis method, applied in the direction of radio wave reflection/re-radiation, using re-radiation, measuring devices, etc., can solve the problems of limited coverage, time-consuming and labor-intensive, unable to reveal the spatial deformation characteristics of landslides, and achieve reliability And the effect of high efficiency, high degree of automation and simple operation

Inactive Publication Date: 2019-03-29
CHANGAN UNIV
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Problems solved by technology

[0004] The purpose of the present invention is to aim at the time-consuming and laborious analysis of loess landslide types and sliding modes, limited coverage, limitations of landslide types and sliding mode research, single SAR data cannot reveal the spatial deformation characteristics of landslides, and it is difficult to deeply analyze the deformation mechanism of landslides problem, providing a method for analyzing loess landslide types and sliding modes based on InSAR multi-dimensional deformation information

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  • Loess landslide type and sliding mode analysis method based on insar multi-dimensional deformation information
  • Loess landslide type and sliding mode analysis method based on insar multi-dimensional deformation information
  • Loess landslide type and sliding mode analysis method based on insar multi-dimensional deformation information

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[0037] like Figure 1 to Figure 12As shown, the present invention discloses a loess landslide type and sliding mode analysis method based on InSAR multi-dimensional deformation information, and the detailed steps are as follows:

[0038] Step 1, through T SAR (Synthetic Aperture Radar, referred to as SAR) sensors covering the research area, obtain T elevator rail SAR image data sets covering the research area and use UAV photogrammetry to obtain external DEM (digital elevation model, Digital Elevation Model (DEM for short) data, the images in each SAR image data set of the acquired T ascending rail SAR image data sets are respectively paired to form a differential interferogram, and then each differential interferogram is subtracted from the external DEM Data, get the InSAR (Synthetic Aperture Radar Interferometry, InSAR for short) differential interferogram, filter the InSAR differential interferogram, and get the filtered InSAR differential interferogram;

[0039] In this s...

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Abstract

The invention discloses a loess landslide type and sliding mode analysis method based on the insar multi-dimensional deformation information. The method comprises the following steps: 1, acquiring a filtered insar differential interference diagram through data acquired by t SAR sensors; 2, carrying out phase unwrapping on the filtered insar differential interference diagram, geocoding and samplingto the same coordinate grid and spatial resolution; 3, unwrapping an interference pattern under a geographic coordinate system, calculating a multi-dimensional surface deformation rate and acquiringa multi-dimensional surface deformation time sequence; 4, based on the multi-dimensional surface deformation rate and the multi-dimensional deformation time sequence, carrying out the landslide deformation mechanism analysis and determining the type and the sliding mode of the landslide through combining remote sensing images with a topographic map. According to the method, the insar technology isadopted for loess landslide type and sliding mode analysis, wherein only SAR images, remote sensing images and the topographic map of a research area are required. Therefore, the method is high in efficiency and accuracy. The workload of the outdoor operation is greatly reduced. The method is suitable for the landslide research in the dangerous area, and provides an important technical support for the landslide disaster prevention and reduction of the loess landslide.

Description

technical field [0001] The invention relates to the field of loess landslide type identification and sliding mode analysis, in particular to a loess landslide type and sliding mode analysis method based on InSAR multi-dimensional deformation information. Background technique [0002] As one of the birthplaces of ancient Chinese civilization, the Loess Plateau is China's most important energy and chemical industry base. In recent years, with the development of economy and the expansion of population, it has become one of the areas with the most serious soil erosion and the most fragile ecological environment in the world. Affected by human activities and engineering construction, geological disasters such as land subsidence, ground fissures, collapses, landslides, and mud flows occur frequently, forming a complex disaster chain that seriously endangers the safety of traffic arteries, major projects, and people's lives and property. Among the frequent geological disasters, lo...

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Application Information

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IPC IPC(8): G01S13/90G01S7/41
CPCG01S7/41G01S13/9023G01S13/9027
Inventor 赵超英刘晓杰杨成生朱武
Owner CHANGAN UNIV
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