Ryan A. Kromer

Ryan A. Kromer
University of Leeds · School of Earth and Environment

PhD Geological Engineering, P.Eng.

About

44
Publications
18,689
Reads
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593
Citations
Citations since 2016
29 Research Items
585 Citations
2016201720182019202020212022050100150
2016201720182019202020212022050100150
2016201720182019202020212022050100150
2016201720182019202020212022050100150

Publications

Publications (44)
Conference Paper
Daily remote monitoring of slope processes using terrestrial structure from motion (SfM) photogrammetry is a relatively new technique in engineering geology. In this study, a five-camera photogrammetry monitoring station was installed in the Siguas River Valley near Majes, Peru in December 2020 for long-term monitoring and study of slope processes....
Article
Full-text available
Point cloud produced from technologies such as terrestrial laser scanning (TLS) and photogrammetry (terrestrial and aerial) are widely used in rockfall monitoring applications due to the wealth of data they provide. In such applications, the acquisition and registration of multi-epoch point clouds is necessary. In addition, point clouds can be deri...
Conference Paper
Full-text available
Point cloud produced from technologies such as terrestrial laser scanning (TLS) and photogrammetry (terrestrial and aerial) are widely used in rockfall monitoring applications due to the wealth of data they provide. In such applications, the acquisition and registration of multi-epoch point clouds is necessary. In addition, point clouds can be deri...
Article
Full-text available
Remote sensing methods which produce point clouds, such as terrestrial laser scanning (TLS), terrestrial photogrammetry (TP), and small unmanned aerial systems (sUAS) have become an integral component of geotechnical monitoring programs. Applications such as rock-slope monitoring benefit from multi-platform datasets to be acquired in two or more di...
Article
Full-text available
While terrestrial laser scanning and photogrammetry provide high quality point cloud data that can be used for rock slope monitoring, their increased use has overwhelmed current data analysis methodologies. Accordingly, point cloud processing workflows have previously been developed to automate many processes, including point cloud alignment, gener...
Conference Paper
Terrestrial and aerial remote sensing technologies are increasingly being used to characterize and monitor rock and soil slopes near vulnerable infrastructure. A challenge remains, however, in filtering and interpreting cluttered point clouds of natural scenes, such as rock and soil slopes, in an efficient manner. Machine learning algorithms have b...
Article
Point cloud classifiers have the potential to rapidly perform landscape characterization for a variety of applications. The generalization (i.e., transferability to new sites) of such classifiers could improve their accessibility and usefulness for both engineers and researchers alike, but guidelines for classifier generalization are lacking in the...
Article
ALONGSIDE THE GROWTH and expansion of spatial data in the geosciences and society in general, virtual- and augmented-reality technology has been providing exciting avenues to explore spatial data in an immersive, intuitive and collaborative way. New virtual and augmented headsets and the growth of 3D spatial data have allowed the creation of novel...
Article
High-resolution remote monitoring of slopes using terrestrial LiDAR and photogrammetry is a valuable tool for the management of civil and mining geotechnical asset hazards, but accurately classifying regions of interest in the data is sometimes a difficult and time-consuming task. Filtering unwanted areas of a point cloud, such as vegetation and ta...
Article
Full-text available
An automated, fixed-location, time lapse camera system was developed as an alternative to monitoring geological processes with lidar or ground-based interferometric synthetic-aperture radar (GB-InSAR). The camera system was designed to detect fragmental rockfalls and pre-failure deformation at rock slopes. It was implemented at a site along interst...
Book
Full-text available
Immersive Geoscience This year’s conference comes at a time when new augmented reality (AR), mixed reality (MR) and virtual reality (VR) hardware are coming to market, including widely available smartphone powered options. Progress in VR, MR and AR technology is reducing the number of abstractions between the user and the computing environment and...
Poster
Full-text available
Terrestrial Laser Scanning (TLS) systems provide 3-dimensional (3D) point clouds suited for earth-surfaces studies. The data collected with Light Detection And Ranging (LiDAR) usually necessitates complex and time-consuming user processing. For the analysis of slope stability problems, multi-date acquisitions are required; this leads to the managem...
Article
Full-text available
Terrestrial laser scanning (TLS) monitoring has been used to estimate the location, volume, and kinematics of a variety of small magnitude rockfalls before failure (1-1000 m 3 range), and in some cases, potential failure time has been assessed through the application of inverse velocity methods. However, our current understanding of rock slope pre-...
Thesis
Full-text available
Rockfalls threaten communities and infrastructure in mountainous regions worldwide and have been a particularly problematic hazard along the transportation corridors in western Canada. These types of failures are traditionally managed using rockfall hazard management frameworks that are based on a historical analysis of rockfall activity. These fra...
Article
Full-text available
Rockfall hazards increase the risk of train derailment along railway corridors in western Canada. In this study, repeated terrestrial laser scanning (TLS) datasets were collected every 2–3 months at three different sites along the Thompson and Fraser River corridors in British Columbia, referred to as the Goldpan, White Canyon, and Mile 109 sites....
Conference Paper
Full-text available
Railways in Western Canada traverse many hazardous slopes, which are the source of frequent rock fall events. An understanding of the rock fall frequency-magnitude relationship can be used in hazard analysis for these railway lines. The White Canyon is an active slope along a 2.2 km section of CN Rail track in British Columbia which is managed by r...
Article
Full-text available
We present an automated terrestrial laser scanning (ATLS) system with automatic near-real-time change detection processing. The ATLS system was tested on the Séchilienne landslide in France for a 6-week period with data collected at 30 min intervals. The purpose of developing the system was to fill the gap of high-temporal-resolution TLS monitoring...
Article
Full-text available
We present an automated terrestrial laser scanning (ATLS) system with automatic near-real-time change detection processing. The ATLS system was tested on the Séchilienne landslide in France for a 6-week period with data collected at 30 min intervals. The purpose of developing the system was to fill the gap of high-temporal-resolution TLS monitoring...
Conference Paper
Full-text available
Rockfall along transportation corridors presents a significant danger to passing motorists in addition to potentially large capital cost associated with maintenance and road closures. Existing rockfall hazard rating systems, implemented by numerous state transportation agencies across the United States, serve to identify key slopes most prone to ro...
Article
Full-text available
Rockfalls represent significant risks to safe and efficient use of transportation corridors. In this paper, we address themanagement of rockfall risk through baseline remote monitoring of susceptible slopes (every 2–4 months) along a transporta-tion corridor along the Fraser River valley in western Canada using a terrestrial laser scanner and suppo...
Article
Full-text available
Using change detection and semi-automated identification methods, it is possible to extract detailed rockfall information from terrestrial laser scanning data to build a database of events, which can be used in the development of the frequency-magnitude relationship for a slope. In this study, we have applied these methods to the White Canyon, a ha...
Conference Paper
Full-text available
Over the past ten years, advances in remote sensing technologies have enabled engineers to observe, interpret, and understand the physical environment and its evolution through time at previously unthinkable levels of detail. LiDAR scanning is one such technology; its ability to collect high-resolution 3-dimensional topographical data with high pre...
Conference Paper
Full-text available
Linear transportation corridors are often exposed to a variety of landslide types, including rockfall and rock slide failures. In western Canada, these failures create one of the highest hazards for safe railway operation. In this study we begin the construction of a database of pre-failure slope deformation based on TLS monitoring of high rockfall...
Article
Full-text available
In Western Canada, substantial lengths of the transportation corridors are located within steep mountainous terrain and deeply incised river valleys. This is also the case for the Canadian National (CN) rail lines, which traverse the Rocky Mountain, the Cascade and Coastal ranges from Edmonton, Alberta, to the ports of Vancouver, British Columbia (...
Article
Full-text available
This study presents a point cloud de-noising and calibration approach that takes advantage of point redundancy in both space and time (4D). The purpose is to detect displacements using terrestrial laser scanner data at the sub-mm scale or smaller, similar to radar systems, for the study of very small natural changes, i.e., pre-failure deformation i...
Conference Paper
Full-text available
Here we address the prediction of rockfall, which represents one of the highest risks to transportation corridors in mountainous terrain. In this study, we monitored a slope along the CN Rail line in the Fraser River Valley, BC using terrestrial laser scanning (TLS) to: identify rockfall source areas based on precursor deformation, track the deform...
Conference Paper
Full-text available
The recent development of rapid, accurate and sophisticated remote sensing tools has provided valuable rock slope change data, previously impossible to obtain. The analysis techniques discussed in this paper utilize detailed and accurate models of three-dimensional geometry developed from photographs and LiDAR point clouds. Models of the rock slope...
Conference Paper
Full-text available
Linear infrastructure corridors in rugged terrain are typically vulnerable to rockfall and rockslide type natural hazards. Once a hazardous event has occurred that warrants investigation in relation to the safety of the site it is critical to collect detailed information quickly. The Railway Ground Hazard Research Program has invested in the develo...
Conference Paper
Full-text available
Railways in Western Canada are exposed to rockfall hazards that can be understood and managed through the use of a rockfall event database, which includes information on rockfall magnitude and frequency. Traditional rockfall inventories collected by railway personnel are often incomplete or lacking in volume information. In this study, LiDAR change...
Conference Paper
Full-text available
Characterizing and monitoring ground hazard processes is a difficult endeavor along mountainous transportation corridors. This is primarily due to the quantity of hazard sites, complex topography, limited and sometimes hazardous access to sites, and obstructed views. The current hazard assessment approach for Canadian railways partly relies on the...
Conference Paper
Full-text available
Characterizing and monitoring ground hazard processes is a difficult endeavor along mountainous transportation corridors. This is primarily due to the quantity of hazard sites, complex topography, limited and sometimes hazardous access to sites, and obstructed views. The current hazard assessment approach for Canadian railways partly relies on the...
Chapter
Research conducted during the course of the Canadian Railway Ground Hazard Research Program has focused on applying new remote sensing techniques to the assessment of ground hazards. The work undertaken at the White Canyon, British Columbia, is reported in this paper include data on this actively moving slope that has been collected using terrestri...
Conference Paper
Full-text available
The White Canyon, located on the Thompson River in British Columbia, Canada is actively eroding and multiple downslope transport processes are occurring simultaneously, subjecting the underlying railway to hazards. The geology of the canyon consists of highly weathered schist with intrusions of competent granitic rock. Differential erosion has form...

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Projects

Projects (3)
Archived project
This is an open special issue for all those who attended the third Virtual Geoscience Conference or for those with research fitting the conference theme.
Archived project
PhD Research
Archived project
The 3rd Virtual Geoscience Conference will provide a meeting place for researchers and industry members at the forefront of technological developments and latest applications of geomatics and visualization tools in the geosciences. The conferene will be held in the beautiful limestone city, in Kingston, Canada!