An integrated monitoring method of land subsidence based on fusion of multi-source monitoring technology

Abstract

The invention discloses a multi-source monitoring technology fusion-based ground subsidence integrated monitoring method. The method comprises laying benchmarks and GPS monitoring points in a ground subsidence focal monitoring area, laying a CR-GPS-benchmark integrated point in a ground stable region, in the same time sequence, acquiring GPS data, ground meteorological data, MODIS data, SAR images and leveling data, calculating GPS data through the combination of synchronous observation data from surrounding CGPS stations and IGS stations and ground meteorological data, calculating atmospheric delay phase information through the combination of GPS data, ground meteorological data and MODIS data, extracting stable PS point and PS point deformation information in an initial differential interferometric phase map, building a ground subsidence vertical deformation field through deformation formation corresponding to the PS points, GPS points, benchmarks and integrated points, constructing a spatial data field through fusion of a horizontal deformation field and a vertical deformation field and acquiring ground subsidence three-dimensional deformation field information having high temporal-spatial resolution. The method can acquire ground three-dimensional deformation information with a large range, a high precision and high temporal-spatial resolution.

Description

technical field [0001] The invention relates to the field of land subsidence monitoring, in particular to an integrated monitoring method of land subsidence based on fusion of multi-source monitoring technologies. Background technique [0002] At present, the monitoring methods of land subsidence mainly include precision leveling survey, bedrock marker-layer marker survey, GPS survey and synthetic aperture radar differential interferometry (InSAR). [0003] Among them, the precision leveling survey obtains the surface deformation information by laying out graded leveling network, adjustment calculation and spatial interpolation. The land subsidence information obtained by this method has high accuracy and reliability, but due to its long re-measurement cycle, manpower The huge consumption of material resources, the inability to meet the requirements of real-time dynamic monitoring of land subsidence, and the discontinuous monitoring information obtained limit the wide applic...

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is to provide an integrated land subsidence monitoring method based on the fusion of multi-source monitoring technologies, so that the existing subsidence monitoring technologies can be organically integrated, and the subsidence information obtained by various monitoring means can be data fused. Obtain large-scale, high-precision, high-spatial-resolution three-dimensional surface deformation information, thereby overcoming the shortcomings of existing land subsidence monitoring methods

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