A Method for Determining the Relationship between Landslide Displacement and Water Level Fluctuation in Reservoir Area
A technology of water level fluctuations and reservoir areas, applied in the field of remote sensing surveying and mapping, can solve problems such as few remote sensing methods, lack of in-depth research on specific water levels, and affect the accuracy of water bodies, and achieve the effect of overcoming time-consuming
Active Publication Date: 2022-03-11
LANZHOU UNIVERSITY
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[0003] Traditional studies on the impact of reservoir water level fluctuations on landslide deformation focus on single-point monitoring, and rarely use integrated remote sensing methods for regional analysis. Currently, SAR images and optical remote sensing images can be used to extract water body information. Although SAR images have all-day The time series, all-weather, and imaging are not affected by clouds and fog, and the same time series as InSAR deformation can be obtained, but the shadows in mountainous areas, aeolian sand, etc. show the same low backscattering system coefficient as water bodies, and these interference information have a great impact Accuracy of water extraction
Optical remote sensing images have been widely used in flood disaster monitoring and wetland water boundary extraction, but previous studies mainly focused on identifying water body information or extracting large-scale surface waters, and lacked in-depth research on the specific water level in a certain area
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Embodiment 1
[0034] Such as figure 1 As shown, a method for determining the relationship between landslide deformation and reservoir water level fluctuations provided by the embodiment of the present invention includes the following steps:
[0035] In this embodiment, two high-resolution optical images are selected, namely Landsat8-OLI image and Sentinel-2 image. Both images were preprocessed before computing the normalized difference water index. First of all, the Landsat8-OLI data and Sentinel-2 data are cropped with the vector boundary covering the study area to reduce the workload and improve the processing speed; two images need to be preprocessed before calculating the normalized difference water index (NDWI): Landsat8 -OLI image preprocessing is carried out in ENVI software, mainly including radiometric calibration and atmospheric correction, Sentinel-2 image preprocessing is carried out in SNAP software, first resampling the original Sentinel-2 image to the same resolution, and th...
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The invention belongs to the field of remote sensing surveying and mapping, and in particular relates to a method for determining the relationship between landslide deformation and water level fluctuation in a reservoir area. The method uses the SBAS-InSAR method to process the research area, and calculates and obtains landslide displacement data; and uses multiple remote sensing data to extract water level information , to obtain the water level data around the specific landslide; finally, the deformation rate of the landslide displacement in the reservoir area under the condition of water level fluctuation is analyzed by modeling. The method of the invention solves the problem of using a single-point monitoring water level to replace the surrounding water level of a specific landslide in the existing related research, analyzes the deformation law of the landslide in the reservoir area under the condition of the fluctuation of the reservoir water level from a new perspective, and provides a new idea for regional monitoring and early warning.
Description
technical field [0001] The invention belongs to the field of remote sensing surveying and mapping, and in particular relates to a method for determining the relationship between landslide deformation and water level fluctuation in a reservoir area. Background technique [0002] Due to energy shortages and environmental protection needs, many countries in the world attach great importance to the construction of water conservancy and hydropower projects. However, while hydropower stations solve energy problems, they also change the regional natural environment conditions, which may bring some new geological environmental problems. Among them, the stability of the bank slope in the reservoir area has always been one of the issues that have attracted much attention in water conservancy and hydropower projects. There are countless cases of dam instability and damage caused by reservoir impoundment. Malpasset Dam, Buffalo Creek Dam, Vajoint Reservoir, Tangyanguang Reservoir, and X...
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IPC IPC(8): G01B11/16G01F23/292
CPCG01B11/16G01F23/292
Inventor 曾润强赵淑芬张宏雪张毅孟兴民张宗林陈冠
Owner LANZHOU UNIVERSITY