Article
Forestry
Nicholas Wilson, Ross Bradstock, Michael Bedward
Summary: Recent logging and wildfires have been associated with increased fire severity in forests globally. The vertical fuel connectivity, especially in disturbed forests, is often cited as a possible cause for this. The study found that canopy recovery after wildfire differs in resprouting and non-resprouting Eucalypt forests, with implications for fire severity.
FOREST ECOLOGY AND MANAGEMENT
(2021)
Article
Geography, Physical
Junling Jin, Jeffrey Verbeurgt, Lars De Sloover, Cornelis Stal, Greet Deruyter, Anne-Lise Montreuil, Sander Vos, Philippe De Maeyer, Alain De Wulf
Summary: In this study, a new remote sensing method using a long-range static terrestrial laser scanner (TLS) was investigated for monitoring the spatio-temporal variation in surface moisture on a sandy beach. A new intensity correction method was proposed to model the relation between beach surface moisture and corrected intensity. The results showed that the long-range static TLS is an extremely suitable technique for monitoring surface moisture dynamics over a substantial beach section at a high scanning frequency.
ISPRS JOURNAL OF PHOTOGRAMMETRY AND REMOTE SENSING
(2021)
Article
Plant Sciences
Peter B. Boucher, Ian Paynter, David A. Orwig, Ilan Valencius, Crystal Schaaf
Summary: The research evaluated the impact of occlusion on TLS scans and compared different stem sets, finding that occlusion from non-stem sources was the major influence on TLS line of sight. It was also discovered that transect and point TLS samples demonstrated better representativeness of some stem properties. Deriving sampled area from TLS scans improved estimates of stem density.
Article
Environmental Sciences
Nicholas Wilson, Ross Bradstock, Michael Bedward
Summary: The study found that the connectivity between canopy height and understorey vegetation significantly influences the probability of high severity wildfire, with fire weather being the primary driver of wildfire severity, and also affected by topography.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Environmental Sciences
Andres Kuusk, Allan Sims
Summary: This study validates the hot-spot theoretical model in the Jarvselja RAMI pine stand using extensive terrestrial laser scanning (TLS) measurements. A point cloud of laser hits with a resolution of 1 cm was created to describe the spatial structure of the crown layer. The study found that the determined value of the hotspot parameter agrees well with the value estimated indirectly from measurements of reflectance profile.
REMOTE SENSING OF ENVIRONMENT
(2022)
Article
Remote Sensing
Martin Mokros, Tomas Mikita, Arunima Singh, Julian Tomastik, Juliana Chuda, Piotr Wezyk, Karel Kuzelka, Peter Surovy, Martin Klimanek, Karolina Zieba-Kulawik, Rogerio Bobrowski, Xinlian Liang
Summary: The development of devices capable of generating 3D point clouds of the forest has flourished in recent years. Low-cost technologies such as MultiCam, iPad Pro, GeoSlam Horizon, and FARO Focus s70 were compared for tree detection and diameter at breast height estimation. Results showed that TLS provided the most accurate data, while iPad Pro achieved results closest to TLS when DBH > 7 cm.
INTERNATIONAL JOURNAL OF APPLIED EARTH OBSERVATION AND GEOINFORMATION
(2021)
Article
Forestry
Cornelis Stal, Jeffrey Verbeurgt, Lars De Sloover, Alain De Wulf
Summary: Sustainable forest management depends on accurate estimation of tree parameters, particularly the DBH for volume and mass extraction. This study showed that HMTLS is a useful alternative technique for precisely and efficiently calculating DBH, with comparable parameters to STLS and ALS data sets but significantly reduced acquisition time.
JOURNAL OF FORESTRY RESEARCH
(2021)
Article
Chemistry, Physical
Marzena Damiecka-Suchocka, Jacek Katzer
Summary: This study explores the feasibility and limitations of using terrestrial laser scanning technology for civil engineering applications on the Moon. By measuring and analyzing different lunar soil simulants, the research shows that terrestrial laser scanning technology can be used for building structures and habitats on the Moon.
Article
Environmental Sciences
Sukant Chaudhry, David Salido-Monzu, Andreas Wieser
Summary: The study presents a simple model for predicting the resolution capability in a laser scanning point cloud, specifically focusing on the angular direction. It utilizes an elliptical Gaussian beam for quantification and verifies the approximation of RC while considering scanning resolution. The model is accessible and supports assessing the suitability of specific scanners or scanning parameters for different applications.
Article
Environmental Sciences
Michael R. Gallagher, Aaron E. Maxwell, Luis Andres Guillen, Alexis Everland, E. Louise Loudermilk, Nicholas S. Skowronski
Summary: Predicting burn severity using TLS data as an alternative method to assess fire impacts is effective, with machine learning algorithms successfully predicting total plot CBI and strata-specific CBI. However, the accuracy of predictions varies among different strata. The combination of TLS and RGB variables improves predictions, highlighting the potential of TLS-based methods for quantifying burn severity compared to traditional methods.
Article
Engineering, Electrical & Electronic
Agata Walicka, Norbert Pfeifer
Summary: This article proposes a method for instance segmentation of individual grains from a terrestrial laser scanning point cloud. The method includes a classification step using the random forest algorithm and a segmentation step using density and Euclidean distance. The experiments showed that the method accurately identifies grains and is robust to the shadowing effect.
IEEE JOURNAL OF SELECTED TOPICS IN APPLIED EARTH OBSERVATIONS AND REMOTE SENSING
(2022)
Review
Environmental Sciences
K. A. Kieta, P. N. Owens, E. L. Petticrew, T. D. French, A. J. Koiter, P. M. Rutherford
Summary: Wildfires are increasing in size and severity in certain regions due to human-caused climate change, historical fire management, and changing species diversity. While research on the effects of wildfires on human health, forest ecology, and soil properties is extensive, there is less focus on the impact of wildfires on watersheds and the contamination of surface waters and sediments. Recent studies have shown that wildfires release significant amounts of toxic and mutagenic compounds, such as polycyclic aromatic hydrocarbons (PAHs). This paper aims to review the literature on the contamination of water and sediment by wildfire-derived PAHs and identify research gaps.
ENVIRONMENTAL REVIEWS
(2023)
Article
Construction & Building Technology
Jose-Ramon Aira-Zunzunegui, Maria Sanchez-Aparicio, Luis Javier Sanchez-Aparicio, Javier Pinilla-Melo, Soledad Garcia-Morales
Summary: The aim of this study was to evaluate the capability of terrestrial laser scanning technology to detect moisture content in timber structures. An extensive experimental campaign was conducted under laboratory conditions, where wood samples were digitized using the Faro Focus 120 phase-shift laser scanner. The reflectance values of each 3D point cloud were related to the moisture content of the samples. The results suggest that the laser scanner could serve as a potential non-destructive tool for diagnosing wooden construction systems, as it can detect deformations and infer moisture content in specific areas of wood elements.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Geography, Physical
Sana Khan, Kirstie Fryirs, Simone Bizzi
Summary: This study examines sediment connectivity across a basin using the case study of the Richmond River Catchment in New South Wales, Australia. By utilizing concepts such as effective catchment area and buffers, along with graph theory and an empirical sediment transport model, the study assesses the locational, transmission, and filter sensitivity properties of a fluvial system. The analysis identifies controls on sediment dynamics and segregates supply limited and transport limited reaches within the catchment.
EARTH SURFACE PROCESSES AND LANDFORMS
(2021)
Article
Environmental Sciences
Andrea Jalandoni, W. Ross Winans, Mark D. Willis
Summary: Terrestrial laser scanning intensity values can reveal hidden painted rock art behind graffiti and moss, providing archaeologists with a new tool for detecting obscured rock art in limestone caves. This method can assist in the interpretation of black painted rock art, which is common globally.
Article
Geography, Physical
A. Securo, C. Del Gobbo, L. Rettig, S. Pillon, A. De Luca, D. Fontana, E. Benedetti Fasil, R. R. Colucci
Summary: Small glaciers in temperate mountain regions have experienced significant reduction and unprecedented melt rates in recent years. Some glaciers have transitioned from clean ice to debris-covered or even rock glaciers. This study examines the surface elevation change of the Popera Alto glacier in the Sesto Dolomites using LiDAR and Structure from Motion surveys, and analyzes its evolution in terms of surface cover and geomorphic processes. The glacier has lost an average of 0.35 m water equivalent per year over the past 16 years, with active modification of its surface cover by geomorphic processes. The role of debris and local topography feedback has allowed the resilience of the glacier, leading to a marked difference between the current environmental equilibrium line altitude (envELA) and the effective ELA (effELA) of the glacier.
Article
Geography, Physical
Zhenzhen Yan, Yaolin Shi, Lili Kang, Xiangtao Fan
Summary: This study proposes a quantitative regional deformation model based on global positioning system (GPS) data to quantitatively analyze the morphological evolution of rivers in the Three Rivers Region. It finds that tectonic deformation phases significantly control regional landscape development and drainage features.
Article
Geography, Physical
Said Mukhtar Ahmad, Nitheshnirmal Sadhasivam, Mona Lisa, Luigi Lombardo, Mustafa Kemal Emil, Amira Zaki, Cees J. Van Westen, Islam Fadel, Hakan Tanyas
Summary: In this study, we investigated a large slow-moving landslide in Northern Pakistan, using Interferometric Synthetic Aperture Radar (InSAR) analysis. Our results showed that the crown of the landslide is moving faster than the surrounding regions, while the footslope experienced high deformations. We discussed the possible roles of meteorologic and anthropogenic factors in causing these deformations.
Article
Geography, Physical
Shuang Bian, Xibin Tan, Yiduo Liu, Suoya Fan, Junfeng Gong, Chao Zhou, Feng Shi, Michael A. Murphy
Summary: The Yarlung River's drainage divide is primarily moving north due to variations in precipitation across the Himalayas. The Gangdese drainage divide shows predominantly northward and southward migration, controlled by base-level rise and downstream influences. The presence of north-trending rifts separates the drainage divides into five zones, each with a distinct migration pattern.
Article
Geography, Physical
Joon-Young Park, Seok Yoon, Deuk-Hwan Lee, Seung-Rae Lee, Hwan-Hui Lim
Summary: This study developed a multiple-regression model to estimate site-specific average growth rates of debris flow events. The proposed model was validated through a case study and showed reasonable predictions of debris flow velocities and heights.
Article
Geography, Physical
Nicholas Reilly Mccarroll, Arnaud Temme
Summary: New geochronological data from hillslope boulder armor in the Flint Hills reveal the rates and timing of lateral retreat in the landscape. Surfaces of limestone boulders dating back to the Pleistocene era were found, and the ages of the hillslope armor increased with distance from the limestone bench. The estimated rate of lateral retreat in this landscape is 0.02 mm/yr.
Article
Geography, Physical
Xinbo Yao, Yuntao Tian
Summary: By studying the Longmenshan-Minshan drainage divide, we found that it has reached a dynamic steady state, indicating a balance between erosion and rock uplift. This study also reveals the process of formation and evolution of the divide and raises questions about the effectiveness of divide migration metrics.
Article
Geography, Physical
Junhui Yu, Pin Yan, Yanlin Wang, Guangjian Zhong, Changliang Chen
Summary: The seafloor mounds in the Chaoshan Depression of the South China Sea are identified as mud volcanoes, with fluids coming from underlying mud-fluid diapirs. The hydrocarbon gases feeding the mud volcanoes and diapirs are reasoned to originate from deep Mesozoic source rocks, indicating significant Mesozoic hydrocarbon potential in the Chaoshan Depression.
Article
Geography, Physical
Marius Huber, Luc Scholtes, Jerome Lave
Summary: This paper investigates the relationships between hillslope stability and fabric anisotropy of brittle rock materials and the implications for landscape shaping. It explores the different stability modes and movement characteristics of anisotropic materials, and demonstrates the significant control of material anisotropy on landscape shaping.
Article
Geography, Physical
Shubhra Sharma, Anil D. Shukla
Summary: The study investigates the relationship between glacial dynamics and lake sedimentation during the mid-Holocene climate variability in the Southern Zanskar ranges. It utilizes geomorphological disposition, elemental geochemistry, and optical chronology of relict lake sediment to reconstruct the pattern of minor glacier responses to climate variability. The results indicate six centennial to millennial-scale climatic phases, with warmer phases represented by decreased mineralogical fine grain flux and increased coarse grain flux. The study highlights the potential of relict lake sediment and para/peri-glacial landforms in understanding glacial dynamics and climate change during the Holocene.
Article
Geography, Physical
Jean-Francois Bernier, Sydney W. Meury, Patrick Lajeunesse
Summary: In this study, an approach combining various data and observation methods was proposed to improve the monitoring of landfast ice dynamics and its geomorphic impact on sedimentary systems. The results demonstrate the ability of the approach to accurately measure interannual variations in landfast ice and constrain geomorphic changes. Additionally, the study found a strong relationship between the severity of freezing seasons and the response of landfast ice to hydrometeorological events, with different geomorphic responses observed under different winter conditions.
Article
Geography, Physical
Heping Shu, Fanyu Zhang
Summary: This study investigates the relationship between susceptibility of soil-water hazards and human activities, geoheritage sites in the Loess Plateau, China. Landslide and gully erosion susceptibility were obtained using gradient boosting and support vector machines, and a hazard matrix was formed to couple landslide and gully erosion susceptibility. The study found different trends in the magnification times of soil-water hazards chain under different scenarios.
Article
Geography, Physical
Guangqiang Qian, Zhuanling Yang, Xuegang Xing, Zhibao Dong, Youyuan Guo
Summary: Granule ripples are aeolian landforms armored against erosion by coarse grains. This study investigates their seasonal morphological evolution and migration in the Sanlongsha Dune Field. The findings show that wind events, especially those exceeding the threshold velocities of coarse grains, significantly influence the morphodynamics of granule ripples. The study highlights the importance of considering the reptation and saltation of coarse grains in future research on granule ripples.