A Method for Landslide Deformation Detection Based on Projection Surface Element Matching of 3D Models

IF 3.3 3区 地球科学 Q2 GEOSCIENCES, MULTIDISCIPLINARY
Mengxi Sun, Hui Cao, Yansong Duan
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引用次数: 0

Abstract

Landslides represent one of the most prevalent natural disasters worldwide, exerting significant adverse effects on social stability and economic development. Timely and accurate monitoring of landslide changes is crucial for disaster prevention and mitigation. Unlike traditional change detection, which often focus on broad environmental changes, landslide monitoring specifically aims to capture critical parameters such as the precise location of deformation, the direction of movement, and the rate of displacement associated with landslide events. Conventional monitoring techniques are typically constrained to fixed-point observations or are limited to the collection of deformation location data, which may not provide a comprehensive understanding of the landslide's behaviour. To address these limitations, this study proposes an innovative approach for detecting landslide deformation utilising multi-temporal imagery acquired through Unmanned Aerial Vehicles (UAVs). Initially, UAVs are deployed to perform multi-temporal photogrammetric surveys of the landslide-affected area, enabling the construction of high-resolution 3D models. These models facilitate the extraction of the exposed surface by employing advanced vegetation segmentation techniques. Following this, the generated 3D models undergo surface segmentation and normal direction projection, resulting in the creation of orthoimages that accurately represent the slope surface. Subsequently, feature matching is conducted between the orthoimages of the slope surface to identify corresponding points across different temporal datasets. Utilising the forward and inverse transformation relationships of these orthoimages, the deformation direction and velocity of the identified deformation points are calculated. This methodology ultimately enables precise and comprehensive monitoring of landslide deformation. To validate the efficacy of the proposed method, a longitudinal study spanning 4 years was conducted at the Che Yiping landslide site located in western Yunnan Province, China. The findings from this extensive experiment indicate that the proposed approach effectively captures the deformation characteristics of the entire landslide, with point displacement accuracy at specific locations comparable to Global Navigation Satellite System (GNSS) measurements. Furthermore, a detailed analysis of the deformation characteristics within the landslide area revealed significant displacement variations at multiple deformation sites, thereby elucidating the overarching deformation trends present at the landslide location. Through this research, we aim to provide critical data support and a scientific foundation for the prevention of landslide disasters and the management of geological hazards. The insights gained from this study are intended to inform relevant decision-making processes, thereby contributing to enhanced safety and resilience in landslide-prone regions.

Abstract Image

基于三维模型投影面元匹配的滑坡变形检测方法
山体滑坡是世界范围内最常见的自然灾害之一,对社会稳定和经济发展造成严重的不利影响。及时准确地监测滑坡变化对防灾减灾至关重要。与传统的变化检测不同,通常关注广泛的环境变化,滑坡监测专门针对捕获关键参数,如变形的精确位置,运动方向以及与滑坡事件相关的位移率。传统的监测技术通常局限于定点观测或限于变形位置数据的收集,这可能无法提供对滑坡行为的全面了解。为了解决这些限制,本研究提出了一种利用无人驾驶飞行器(uav)获取的多时相图像检测滑坡变形的创新方法。最初,部署无人机对滑坡影响地区进行多时相摄影测量调查,实现高分辨率3D模型的构建。这些模型采用先进的植被分割技术,便于提取暴露地表。在此之后,生成的3D模型进行表面分割和法线方向投影,从而创建准确表示斜坡表面的正射影像。然后,在坡面正射影之间进行特征匹配,识别不同时间数据集的对应点。利用这些正射影像的正反变换关系,计算出识别出的变形点的变形方向和速度。这种方法最终能够精确和全面地监测滑坡变形。为了验证该方法的有效性,在云南省西部的车一坪滑坡现场进行了为期4年的纵向研究。这项广泛实验的结果表明,所提出的方法有效地捕获了整个滑坡的变形特征,其特定位置的点位移精度可与全球导航卫星系统(GNSS)测量相媲美。此外,对滑坡区域内的变形特征进行了详细分析,揭示了多个变形点的显著位移变化,从而阐明了滑坡位置的总体变形趋势。本研究旨在为滑坡灾害防治和地质灾害管理提供关键数据支持和科学依据。从本研究中获得的见解旨在为相关决策过程提供信息,从而有助于提高滑坡易发地区的安全性和复原力。
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来源期刊
Geoscience Data Journal
Geoscience Data Journal GEOSCIENCES, MULTIDISCIPLINARYMETEOROLOGY-METEOROLOGY & ATMOSPHERIC SCIENCES
CiteScore
5.90
自引率
9.40%
发文量
35
审稿时长
4 weeks
期刊介绍: Geoscience Data Journal provides an Open Access platform where scientific data can be formally published, in a way that includes scientific peer-review. Thus the dataset creator attains full credit for their efforts, while also improving the scientific record, providing version control for the community and allowing major datasets to be fully described, cited and discovered. An online-only journal, GDJ publishes short data papers cross-linked to – and citing – datasets that have been deposited in approved data centres and awarded DOIs. The journal will also accept articles on data services, and articles which support and inform data publishing best practices. Data is at the heart of science and scientific endeavour. The curation of data and the science associated with it is as important as ever in our understanding of the changing earth system and thereby enabling us to make future predictions. Geoscience Data Journal is working with recognised Data Centres across the globe to develop the future strategy for data publication, the recognition of the value of data and the communication and exploitation of data to the wider science and stakeholder communities.
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