A landslide disaster emergency monitoring method based on ground-based radar

Abstract

The invention discloses a landslide disaster emergency monitoring method based on ground-based radar, including: survey point selection and on-site layout; data acquisition: setting the observation parameters of the ground-based radar, and determining the observation time and observation range of landslide data acquisition; data transmission: building data Transmission network; Interference processing: Use GAMMA software to perform interference processing on two adjacent image data to obtain an interferogram; Phase unwrapping: Filter the interferogram, select the starting point of phase unwrapping, and unwrap to obtain rectangular coordinates Phase unwrapping diagram in the system; single deformation diagram generation: convert the phase unwrapping diagram in the rectangular coordinate system to the polar coordinate system to generate a single deformation diagram; total deformation diagram generation: generate the total deformation diagram and rate of each time period Graph to analyze the region of interest. The invention can monitor the landslide in real time for a long time, obtain the two-dimensional deformation map of the landslide area, and provide data support for the early warning and control of the landslide geological disaster.

Description

technical field [0001] The invention relates to the technical field of landslide disaster monitoring, in particular to an emergency monitoring method for landslide disasters based on ground-based radar. Background technique [0002] Landslide monitoring mainly includes total station, GPS, aerial photogrammetry, 3D laser scanning measurement and optical remote sensing measurement. Although the total station and GPS can obtain high-precision landslide point information, they cannot obtain the deformation results of the entire landslide area and cannot conduct large-scale observations. Although 3D laser scanning measurement, aerial photogrammetry and optical remote sensing measurement have high observation accuracy and wide observation range, it is difficult to obtain accurate results under meteorological conditions such as rain, snow, and fog. Space-borne synthetic aperture radar interferometry technology is also widely used in landslide monitoring, which can identify hidden ...

AI Technical Summary

Problems solved by technology

Although the total station and GPS can obtain high-precision landslide point information, they cannot obtain the deformation results of the entire landslide area and cannot conduct large-scale observations

Although 3D laser scanning measurement, aerial photogrammetry and optical remote sensing measurement have high observation accuracy and wide observation range, it is difficult to obtain accurate results under weather conditions such as rain, snow and fog

Space-borne synthetic aperture radar interferometry technology is also widely used in landslide monitoring, which can identify hidden danger points of geological disasters and troubleshoot in a large range, but limited by fixed orbit and long revisit period, it is impossible to conduct long-term monitoring continuous real-time observation

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