Integrating airborne and multi‐temporal long‐range terrestrial laser scanning with total station measurements for mapping and monitoring a compound slow moving rock slide

Corsini, Alessandro; Castagnetti, Cristina; Bertacchini, Eleonora; Rivola, Riccardo; Ronchetti, Francesco; Capra, Alessandro

doi:10.1002/esp.3445

Cited by 49 publications

(29 citation statements)

References 51 publications

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“…Nowadays, the diagnosis of the rock surface of sea cliffs could be developed by means of monitoring operations based on advanced surveying methodologies. Among these, aerial or terrestrial (TLS) LiDAR, close range photogrammetry, field surveys with total station and compass-clinometer can provide useful information in the characterization of rock discontinuities and potential unstable processes [1][2][3][4]. Manual field measurements have instead frequently major drawbacks related to logistic difficulties, safety risks for the operators, and inaccessible sites.…”

Section: Introductionmentioning

confidence: 99%

An Integrated Procedure to Assess the Stability of Coastal Rocky Cliffs: From UAV Close-Range Photogrammetry to Geomechanical Finite Element Modeling

et al. 2017

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Abstract:The present paper explores the combination of unmanned aerial vehicle (UAV) photogrammetry and three-dimensional geomechanical modeling in the investigation of instability processes of long sectors of coastal rocky cliffs. The need of a reliable and detailed reconstruction of the geometry of the cliff surfaces, beside the geomechanical characterization of the rock materials, could epresent a very challenging requirement for sub-vertical coastal cliffs overlooking the sea. Very often, no information could be acquired by alternative surveying methodologies, due to the absence of vantage points, and the fieldwork could pose a risk for personnel. The case study is represented by a 600 m long sea cliff located at Sant'Andrea (Melendugno, Apulia, Italy). The cliff is characterized by a very complex geometrical setting, with a suggestive alternation of 10 to 20 m high vertical walls, with frequent caves, arches and rock-stacks. Initially, the rocky cliff surface was reconstructed at very fine spatial resolution from the combination of nadir and oblique images acquired by unmanned aerial vehicles. Successively, a limited area has been selected for further investigation. In particular, data refinement/decimation procedure has been assessed to find a convenient three-dimensional model to be used in the finite element geomechanical modeling without loss of information on the surface complexity. Finally, to test integrated procedure, the potential modes of failure of such sector of the investigated cliff were achieved. Results indicate that the most likely failure mechanism along the sea cliff examined is represented by the possible propagation of shear fractures or tensile failures along concave cliff portions or over-hanging due to previous collapses or erosion of the underlying rock volumes. The proposed approach to the investigation of coastal cliff stability has proven to be a possible and flexible tool in the rapid and highly-automated investigation of hazards to slope failure in coastal areas.

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Section: Introductionmentioning

confidence: 99%

An Integrated Procedure to Assess the Stability of Coastal Rocky Cliffs: From UAV Close-Range Photogrammetry to Geomechanical Finite Element Modeling

et al. 2017

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“…On the other hand, with a spatial resolution and accuracy in the order of some centimetres, TLS is potentially suitable for examining movements on the order of few centimetres only, which is the yearly displacement rate in many rockslides [9] [10]. However, differential analysis of TLS surveys (D-TLS) requires that several factors are considered and accounted for during surveying and processing [11] [12]. Moreover, the results must still be validated by independent data such as those obtained by GNSS (Global Navigation Satellite Systems) or ATS (Automated Total Station) monitoring systems [13] [14] that, together with GB SAR (Ground-Based Synthetic Aperture Radar) Interferometry [15], are still the most reliable methods for rockslide monitoring in differed-time as well as in real time.…”

Section: Introductionmentioning

confidence: 99%

A reliable methodology for monitoring unstable slopes: the multi-platform and multi-sensor approach

et al. 2014

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High resolution topography, by involving Digital Terrain Models (DTMs) and further accurate techniques for a proper displacement identification, is a valuable tool for a good and reliable description of unstable slopes. By comparing multitemporal surveys, the geomorphology of a landslide may be analyzed as well as the changes over time, the volumes transportation and the boundaries evolution. Being aware that a single technique is not sufficient to perform a reliable and accurate survey, this paper discusses the use of multi-platform, multi-source and multi-scale observations (both in terms of spatial scale and time scale) for the study and monitoring of unstable slopes. The final purpose is to highlight and validate a methodology based on multiple sensors and data integration, useful to obtain a comprehensive GIS (Geographic Information System) which can successfully be used to manage natural disasters or to improve the knowledge of a specific phenomenon in order to prevent and mitigate the hydro-geological risk. The novelty of the present research lies in the spatial integration of multiple remote sensing techniques such as: integration of Airborne Laser Scanning (ALS) and Terrestrial Laser Scanning (TLS) to provide a comprehensive and accurate surface description (DTM) at a fixed epoch (spatial continuity); continuous monitoring by means of spatial integration of Automated Total Station (ATS) and GNSS (Global Navigation Satellite System) to provide accurate surface displacement identification (time continuity). Discussion makes reference to a rockslide located in the northern Apennines of Italy from 2010 to 2013. © (2014) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only

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“…In spite of the increasing use of new technologies, total station-the integration of a theodolite and an Electronic Distance Meter (EDM)-remains a fundamental instrument for monitoring [8][9][10][11][12][13]. Accurate angle and range measurements are useful when describing the surface of the ground, measuring the displacements of selected points and evaluating morphological evolutions.…”

Section: Introductionmentioning

confidence: 99%

Monitoring a Landslide with High Accuracy by Total Station: A DTM-Based Model to Correct for the Atmospheric Effects

Artese

Perrelli²

2018

Geosciences

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For the monitoring of large landslides, total stations equipped with an Electronic Distance Meter (EDM) are widely used. To obtain the atmospheric parameters, required along the line of sight of every measure, the data collected by a weather station close to the instrument are usually adopted. Even after these corrections, the results obtained in the monitoring of areas with complex topography don't reach the accuracies theoretically attainable by the high-end instruments. The article proposes a method for removing the errors due to the influence of microclimate on the measurements obtained by a high-end EDM, in order to get the maximum accuracy obtainable from such instruments. The method is based on an atmospheric model, set up by using the climatic data and a digital terrain model (DTM) of the landslide area. The methodology has been applied to a landslide in southern Italy. Over 38,000 distances, acquired for each monitored point, were used. The results demonstrate the effectiveness of the method: the standard deviations of the distances after their correction, show a reduction, ranging from 20% to 50%, with respect to the most diffused procedures; furthermore, the obtained accuracy equals the one declared by the manufacturer of the instrument for measurements in optimal conditions.

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Integrating airborne and multi‐temporal long‐range terrestrial laser scanning with total station measurements for mapping and monitoring a compound slow moving rock slide

Cited by 49 publications

References 51 publications

An Integrated Procedure to Assess the Stability of Coastal Rocky Cliffs: From UAV Close-Range Photogrammetry to Geomechanical Finite Element Modeling

An Integrated Procedure to Assess the Stability of Coastal Rocky Cliffs: From UAV Close-Range Photogrammetry to Geomechanical Finite Element Modeling

A reliable methodology for monitoring unstable slopes: the multi-platform and multi-sensor approach

Monitoring a Landslide with High Accuracy by Total Station: A DTM-Based Model to Correct for the Atmospheric Effects

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