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Landslide depth inversion method using InSAR elevating track deformation data

A lifting rail and deformation technology, applied in the direction of re-radiation, radio wave reflection/re-radiation, and measuring devices, can solve problems such as inability to accurately reflect the depth distribution of landslides, improve reliability and applicability, and improve The effect of accuracy

Pending Publication Date: 2021-12-28
CHENGDU UNIVERSITY OF TECHNOLOGY +1
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007]Aiming at the above-mentioned deficiencies in the prior art, the landslide depth inversion method using InSAR lifting rail deformation data provided by the present invention solves the problem that the traditional landslide depth detection method cannot be accurate The problem of reflecting the depth distribution of the entire landslide mass

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  • Landslide depth inversion method using InSAR elevating track deformation data
  • Landslide depth inversion method using InSAR elevating track deformation data
  • Landslide depth inversion method using InSAR elevating track deformation data

Examples

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Effect test

Embodiment 1

[0051] Such as figure 1 As shown, a landslide depth inversion method using InSAR lift rail deformation data includes the following steps:

[0052] S1. Use the time-series InSAR technology to process the radar images of the ascending and descending rails in the landslide area, and obtain the time-series deformation data of the landslide area;

[0053] S2. According to the time-series deformation data, the spatial geometric relationship of the landslide area and the DEM data, obtain the two-dimensional deformation data of the landslide surface along the slope direction and the normal direction;

[0054] S3. Construct a landslide depth inversion model based on two-dimensional deformation under the principle of mass conservation, and calculate the landslide depth inversion model according to the two-dimensional deformation data, and obtain the inversion calculation result of landslide depth.

[0055] This embodiment considers that the small baseline interferometry (SBAS-InSAR) te...

Embodiment 2

[0091] In this example, the landslide depth inversion is carried out in the ancient landslide area of ​​Taoping Township through the method in Example 1 above. The mountainous monsoon climate zone has a wide range of elevation differences and complex terrain. Affected by the climate, there is more rainfall in this region from July to September every year, and relatively less precipitation in winter, with annual rainfall between 650mm and 1000mm. The ancient landslide in Taoping Township is generally in the shape of a chair. The terrain is high in the south-west and low in the north-east. The slope is narrow at the top and wide at the bottom. The average slope is about 27°-53°. The edge elevation is about 2710m, the relative height difference is ~1230m, the longitudinal length is about 2700m, and the lateral width is ~2000m, which belongs to a large landslide.

[0092] In this example, the SAR images of the ascending and descending orbits observed under the interferometric wid...

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Abstract

The invention discloses a landslide depth inversion method using InSAR elevating track deformation data, and the method comprises the following steps: S1, carrying out the processing of an elevating track radar image of a landslide region through employing a time sequence InSAR technology, and obtaining the time sequence deformation data of the landslide region; s2, according to the time sequence deformation data, the spatial geometrical relationship of the landslide area and DEM data, obtaining two-dimensional deformation data of the landslide surface in the slope direction and the normal direction through calculation; and S3, constructing a landslide depth inversion model based on two-dimensional deformation under a mass conservation criterion, and calculating the landslide depth inversion model according to the two-dimensional deformation data to obtain an inversion calculation result of the landslide depth. The method is suitable for successfully extracting and obtaining the landslide mass of the InSAR deformation field of the ascending and descending orbit of the satellite, in addition, the landslide depth can be subjected to significant image inversion through the rheological parameters of the slope body substances, and the reliability and applicability of the method are significantly improved through the accuracy of the parameters.

Description

technical field [0001] The invention belongs to the technical field of landslide depth detection, and in particular relates to a landslide depth inversion method using InSAR lifting rail deformation data. Background technique [0002] Landslide disasters are characterized by strong suddenness, great harm, and difficulties in early identification, monitoring and early warning. Since the 1950s, at least 22 provinces, municipalities, and autonomous regions in my country have suffered landslide disasters of varying degrees, causing huge disasters. Casualties and property losses, and a direct threat to the safety of major human engineering facilities such as roads, railways, water conservancy and hydropower, and mines. Therefore, early identification, monitoring and early warning, and risk assessment of landslide disasters have become important tasks in the field of disaster prevention and mitigation in my country. Among them, landslide surface deformation velocity, landslide dep...

Claims

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Application Information

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IPC IPC(8): G01S13/90
CPCG01S13/9023
Inventor 杨莹辉郭劲松许强范宣梅刘威黎浩良刘本银陶鑫鑫
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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