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Analysis method for response of landslide to rainfall on regional scale

A technology of regional scale and analysis method, applied in the direction of electromagnetic measuring devices, instruments, measuring devices, etc., can solve problems such as uncertainty, model limitation, neglect, etc., and achieve the effect of improving the work efficiency of landslide geological disaster prevention and prediction

Active Publication Date: 2022-05-06
NORTHWEST UNIV
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Problems solved by technology

In addition, some experts use models to quantify the impact of rainfall on landslides, but the models generally have great limitations and uncertainties; and if they only focus on a single time dimension, some important information may be ignored

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  • Analysis method for response of landslide to rainfall on regional scale
  • Analysis method for response of landslide to rainfall on regional scale
  • Analysis method for response of landslide to rainfall on regional scale

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Embodiment Construction

[0035] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0036] Such as figure 1 As shown, an analysis method of landslide response to seasonal rainfall on a regional scale, which includes the following steps:

[0037] Step 1. Collect relevant information on the target area:

[0038]Collect regional geological and stratigraphic distribution data, temperature, precipitation and other data, historical SAR images, and historical landslide disasters in the region. According to the above data, the hazard degree of landslides in the area is judged, and the initial scope of the target area is initially determined.

[0039] Step 2. Based on the collected SAR image data, identify and monitor the target area based on InSAR technology, and obtain typical landslide displacement data in the area. Including the following three aspects:

[0040] Step 2.1. Pre-processing the SAR image data in the study area:

[0041] Af...

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Abstract

A method for analyzing response of landslide on regional scale to seasonal rainfall comprises the following steps: collecting related data of a target region, such as surrounding geological formation distribution, collecting and investigating natural condition data such as air temperature and rainfall, collecting historical SAR images in the target region, judging the hazard degree, inducement and disaster forming process of historical landslide disasters, and analyzing the response of the landslide on the regional scale to seasonal rainfall. Preliminarily delimiting the general range of the target area to be analyzed; carrying out deformation identification and monitoring on a target area by utilizing Stacking-InSAR and time sequence InSAR technologies, and obtaining landslide displacement data in the area; verifying the comprehensively selected typical landslide in combination with an InSAR result and field survey data to ensure the correctness of landslide displacement data; and finally, exploring a quantitative relation between rainfall and landslide displacement by using a wavelet analysis tool.

Description

technical field [0001] The invention belongs to the technical field of geological disasters, and in particular relates to a method for analyzing the response of landslides to rainfall on a regional scale. Background technique [0002] Rainfall is an important trigger for most landslides, responsible for two-thirds of landslides worldwide. In recent decades, global climate change has made rainfall more unusual, especially at high altitudes and in regions of uneven terrain, which has significantly increased the frequency of landslides. The relationship between rainfall and landslides has always been the focus and difficulty of research. [0003] Studying the response of landslide deformation to rainfall can help us understand the movement process of landslides, thereby reducing the occurrence of disasters. InSAR (Interferometic SAR), as a microwave remote sensing technology for large-scale monitoring of small-scale deformation, is playing an increasingly important role in la...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B7/16G01S19/42
CPCG01B7/16G01S19/42
Inventor 刘雅邱海军杜驰胥瑶朱亚茹张娟娟
Owner NORTHWEST UNIV