Time sequence InSAR watershed reservoir bank deformation prediction method based on self-adaptive KF

Abstract

The invention discloses a time sequence InSAR watershed reservoir bank deformation prediction method based on self-adaptive KF. The method comprises the following steps: SAR image selection, image data registration, differential interferogram generation, self-adaptive Kalman filter design, newly added image processing and deformation prediction. According to the invention, a state equation and anobservation equation of the self-adaptive Kalman filter are derived in detail according to a differential interferometric phase model, and a theoretical model of deformation prediction is establishedin combination with the technical process of the time sequence InSAR, so that the deformation trend of the large-area observation area of the watershed reservoir bank is effectively predicted, and a deformation prediction value with relatively high precision and high spatial resolution is obtained; and the method is suitable for large-scale watershed reservoir bank area deformation prediction, theprediction precision is high, early warning information is provided for related personnel by accurately predicting the magnitude of watershed reservoir bank deformation quantity at the future moment,a manager is prompted to carry out safety inspection on the potential abnormal deformation reservoir bank position, and disasters and property loss are effectively reduced.

Description

technical field [0001] The invention relates to the technical field of regional deformation monitoring, in particular to a time-series InSAR basin bank deformation prediction method based on adaptive KF. Background technique [0002] Reservoir bank deformation refers to the displacement of the reservoir bank slope in different directions under unstable conditions. Once the large-scale displacement of the bank slope causes the slope to slide and form a slope disaster, it will pose a huge threat to the construction and operation safety of water conservancy and hydropower projects. At the same time, it will increase the cost of project construction and maintenance, delay the construction period, and affect the normal use of the reservoir. In addition, it will also cause loss of life and property in the downstream of the reservoir area, and damage to the surrounding natural environment. my country is one of the countries that suffer the most serious landslide disasters. The bank s...

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Problems solved by technology

[0002] Reservoir bank deformation refers to the displacement of the reservoir bank slope in different directions under unstable conditions. Once the large-scale displacement of the bank slope causes the slope to slide and form a slope disaster, it will pose a huge threat to the construction and operation safety of water conservancy and hydropower projects. At the same time, it will increase the cost of project construction and maintenance, delay the construction period, and affect the normal use of the reservoir. In addition, it will also cause loss of life and property in the downstream of the reservoir area, and damage to the surrounding natural environment. my country is one of the countries that suffer the most serious landslide disasters. The bank slope of the river basin, especially the reservoir bank slope after the reservoir is impounded, is a high-incidence area for landslides and other disasters. It can be seen that the landslide of the reservoir bank slope is extremely harmful and seriously restricts the development of the national economy. Therefore, the deformation prediction of the reservoir bank of the river basin To correctly identify its evolution and deformation stage, it is necessary to provide technical support for subsequent emergency response measures;

[0003] Most of the water conservancy projects in my country have deployed various sensors and intelligent control equipment inside and outside the dam, and some hydropower stations have realized monitoring automation, such as Nuozhadu, Xiaowan, Manwan, Miaowei and Gongguo Bridge. The monitoring of the banks of the river basin is still in its infancy, and in many cases, it is not enough to only know the historical deformation information of the monitoring area of ​​the banks of the river basin. It is not enough to predict the value of the deformation of the banks of the river basin in the future, so as to provide relevant personnel Provide early warning information to prompt managers to conduct safety checks on potential abnormally deformed bank locations, and effectively reduce disasters and property losses. Therefore, the present invention proposes a time-series InSAR river basin bank deformation prediction method based on adaptive KF to solve existing problems. problems in technology

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