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中国滑坡遥感 总被引:16,自引:0,他引:16
我国滑坡遥感已有20多a的历史,作为区域性滑坡宏观调查的主要手段曾为山区大型工程建设的滑坡灾害调查及防灾减灾工作
作出了重要贡献。上世纪末以来,由于采用了“数字滑坡技术”和高分辨率遥感数据,滑坡遥感成为能更准确的定性、定量的调查手
段,甚至可进行大型个体滑坡的详细调查和监测研究。“数字滑坡”技术的实现主要依赖于遥感技术、数字摄影测量及图像处理技术
、GIS技术和计算机技术的支持。该技术大致可分为3大部分: 滑坡基本信息获取、信息存贮和管理及专题服务技术。本文以三峡库
区、四川天台乡滑坡、金龙山滑坡及易贡滑坡遥感调查及监测说明“数字滑坡”技术的专题服务应用。 相似文献
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利用存档光学遥感影像对灾前演变情况进行分析是目前常用的方法,但往往受限于获取时间密度、云量等因素。随着雷达遥感卫星数据质量的不断提升,合成孔径雷达干涉测量(interferometric syntheticaperture radar,InSAR)技术可以为滑坡灾前形变探测提供新的技术途径。基于欧洲空间局哨兵一号(Sentinel-1)雷达卫星数据,同时结合升轨与降轨视线向形变结果提取沿坡向与垂直向二维形变,对2018年7月12日甘肃南峪乡滑坡灾前二维形变进行追溯分析。时序结果显示,该滑坡自2017年6月起便已经开始缓慢的变形,至滑坡发生前13个月时最大累积形变量达77 mm。结合降雨量数据对比分析,发现该滑坡灾前变形与降雨量变化高度吻合,说明降雨是该滑坡发生的主要诱因之一。该InSAR追溯结果展示了星载雷达干涉测量技术在滑坡探测方面的应用潜力,为滑坡诱因分析、防灾减灾乃至滑坡监测预警工作提供了新的思路与参考。 相似文献
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利用存档光学遥感影像对灾前演变情况进行分析是目前常用的方法,但往往受限于获取时间密度、云量等因素。随着雷达遥感卫星数据质量的不断提升,合成孔径雷达干涉测量(interferometric syntheticaperture radar,InSAR)技术可以为滑坡灾前形变探测提供新的技术途径。基于欧洲空间局哨兵一号(Sentinel-1)雷达卫星数据,同时结合升轨与降轨视线向形变结果提取沿坡向与垂直向二维形变,对2018年7月12日甘肃南峪乡滑坡灾前二维形变进行追溯分析。时序结果显示,该滑坡自2017年6月起便已经开始缓慢的变形,至滑坡发生前13个月时最大累积形变量达77 mm。结合降雨量数据对比分析,发现该滑坡灾前变形与降雨量变化高度吻合,说明降雨是该滑坡发生的主要诱因之一。该InSAR追溯结果展示了星载雷达干涉测量技术在滑坡探测方面的应用潜力,为滑坡诱因分析、防灾减灾乃至滑坡监测预警工作提供了新的思路与参考。 相似文献
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滑坡灾害是最常见的地质灾害之一,无人机遥感和虚拟现实(virtual reality,VR)技术的快速发展为滑坡灾害沉浸式模拟与可视化分析提供了重要的数据资源和技术支持。拟重点开展滑坡灾害VR场景动态构建与探索分析研究,探讨了滑坡灾害数据多样化组织、VR场景动态融合表达等关键技术,提出了基于手柄射线的VR场景交互方法,在此基础上进行了原型系统研发与案例试验分析。试验结果表明,所提方法在无人机遥感数据支持下能够动态构建滑坡灾害VR场景,并且能够支持用户沉浸式交互与滑坡灾情信息分析。 相似文献
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基于GIS的西攀高速公路沿线滑坡灾害管理 总被引:3,自引:0,他引:3
滑坡是西攀高速公路主要的地质灾害之一,本文采用GIS技术建立了西攀高速公路沿线滑坡灾害管理系统,提高了滑坡灾害的管理效率。详细讨论了各种滑坡灾害专题制图和滑坡体三维可视化建模的过程和方法。这些是滑坡治理过程中重要的非工程措施,也为滑坡治理的工程措施的优化提供决策依据。 相似文献
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Pece V Gorsevski Paul E Gessler Randy B Foltz William J Elliot 《Transactions in GIS》2006,10(3):395-415
An empirical modeling of road related and non‐road related landslide hazard for a large geographical area using logistic regression in tandem with signal detection theory is presented. This modeling was developed using geographic information system (GIS) and remote sensing data, and was implemented on the Clearwater National Forest in central Idaho. The approach is based on explicit and quantitative environmental correlations between observed landslide occurrences, climate, parent material, and environmental attributes while the receiver operating characteristic (ROC) curves are used as a measure of performance of a predictive rule. The modeling results suggest that development of two independent models for road related and non‐road related landslide hazard was necessary because spatial prediction and predictor variables were different for these models. The probabilistic models of landslide potential may be used as a decision support tool in forest planning involving the maintenance, obliteration or development of new forest roads in steep mountainous terrain. 相似文献
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Spatial Prediction of Landslide Hazard Using Fuzzy k-means and Dempster-Shafer Theory 总被引:2,自引:0,他引:2
Landslide databases and input parameters used for modeling landslide hazard often contain imprecisions and uncertainties inherent in the decision‐making process. Dealing with imprecision and uncertainty requires techniques that go beyond classical logic. In this paper, methods of fuzzy k‐means classification were used to assign digital terrain attributes to continuous landform classes whereas the Dempster‐Shafer theory of evidence was used to represent and manage imprecise information and to deal with uncertainties. The paper introduces the integration of the fuzzy k‐means classification method and the Dempster‐Shafer theory of evidence to model landslide hazard in roaded and roadless areas illustrated through a case study in the Clearwater National Forest in central Idaho, USA. Sample probabilistic maps of landslide hazard potential and uncertainties are presented. The probabilistic maps are intended to help decision‐making in effective forest management and planning. 相似文献
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A robust method for spatial prediction of landslide hazard in roaded and roadless areas of forest is described. The method is based on assigning digital terrain attributes into continuous landform classes. The continuous landform classification is achieved by applying a fuzzy k-means approach to a watershed scale area before the classification is extrapolated to a broader region. The extrapolated fuzzy landform classes and datasets of road-related and non road-related landslides are then combined in a geographic information system (GIS) for the exploration of predictive correlations and model development. In particular, a Bayesian probabilistic modeling approach is illustrated using a case study of the Clearwater National Forest (CNF) in central Idaho, which experienced significant and widespread landslide events in recent years. The computed landslide hazard potential is presented on probabilistic maps for roaded and roadless areas. The maps can be used as a decision support tool in forest planning involving the maintenance, obliteration or development of new forest roads in steep mountainous terrain. 相似文献
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The current paper presents landslide hazard analysis around the Cameron area, Malaysia, using advanced artificial neural networks with the help of Geographic Information System (GIS) and remote sensing techniques. Landslide locations were determined in the study area by interpretation of aerial photographs and from field investigations. Topographical and geological data as well as satellite images were collected, processed, and constructed into a spatial database using GIS and image processing. Ten factors were selected for landslide hazard including: 1) factors related to topography as slope, aspect, and curvature; 2) factors related to geology as lithology and distance from lineament; 3) factors related to drainage as distance from drainage; and 4) factors extracted from TM satellite images as land cover and the vegetation index value. An advanced artificial neural network model has been used to analyze these factors in order to establish the landslide hazard map. The back-propagation training method has been used for the selection of the five different random training sites in order to calculate the factor’s weight and then the landslide hazard indices were computed for each of the five hazard maps. Finally, the landslide hazard maps (five cases) were prepared using GIS tools. Results of the landslides hazard maps have been verified using landslide test locations that were not used during the training phase of the neural network. Our findings of verification results show an accuracy of 69%, 75%, 70%, 83% and 86% for training sites 1, 2, 3, 4 and 5 respectively. GIS data was used to efficiently analyze the large volume of data, and the artificial neural network proved to be an effective tool for landslide hazard analysis. The verification results showed sufficient agreement between the presumptive hazard map and the existing data on landslide areas. 相似文献
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Approaches for delineating landslide hazard areas using different training sites in an advanced artificial neural network model 总被引:10,自引:0,他引:10
The current paper presents landslide hazard analysis around the Cameron area, Malaysia, using advanced artificial neural networks
with the help of Geographic Information System (GIS) and remote sensing techniques. Landslide locations were determined in
the study area by interpretation of aerial photographs and from field investigations. Topographical and geological data as
well as satellite images were collected, processed, and constructed into a spatial database using GIS and image processing.
Ten factors were selected for landslide hazard including: 1) factors related to topography as slope, aspect, and curvature;
2) factors related to geology as lithology and distance from lineament; 3) factors related to drainage as distance from drainage;
and 4) factors extracted from TM satellite images as land cover and the vegetation index value. An advanced artificial neural
network model has been used to analyze these factors in order to establish the landslide hazard map. The back-propagation
training method has been used for the selection of the five different random training sites in order to calculate the factor’s
weight and then the landslide hazard indices were computed for each of the five hazard maps. Finally, the landslide hazard
maps (five cases) were prepared using GIS tools. Results of the landslides hazard maps have been verified using landslide
test locations that were not used during the training phase of the neural network. Our findings of verification results show
an accuracy of 69%, 75%, 70%, 83% and 86% for training sites 1, 2, 3, 4 and 5 respectively. GIS data was used to efficiently
analyze the large volume of data, and the artificial neural network proved to be an effective tool for landslide hazard analysis.
The verification results showed sufficient agreement between the presumptive hazard map and the existing data on landslide
areas. 相似文献