Showing papers in "Geomorphology in 2013"

TL;DR: In this paper, a geomorphometric index based on the approach by Borselli et al. was developed and applied to assess spatial sediment connectivity in two small catchments of the Italian Alps featuring contrasting morphological characteristics.

TL;DR: In this paper, the concept of geomorphon (geomorphologic phonotypes) is introduced for classification and mapping of landform elements from a DEM based on the principle of pattern recognition rather than differential geometry.

TL;DR: In this paper, the authors applied TPI to a geoarchaeological research project in northwestern Belgium but their use led to erroneous landform classifications in this heterogeneous landscape, and they found that deviation from mean elevation (DEV) was a better method for landform classification than TPI.

TL;DR: In this article, a photogrammetrically-derived digital terrain model (DTM) developed from imagery acquired with a low-cost digital camera onboard an sUAS was used for resolving small-scale biogeomorphic features.

TL;DR: In this article, the authors analyzed the main environmental and human features related to soil erosion processes, and the main factors that explain the extreme variability of factors influencing soil erosion, particularly recent land use changes.

TL;DR: In this paper, the authors present a global synopsis about the geomorphic evidence of soil erosion in humid and semihumid areas since the beginning of agriculture, starting from ancient records to data from the mid-twentieth century and numerous literature reviews form an extensive assortment of examples that show how soil erosion has been perceived previously by scholars, land surveyors, farmers, land owners, researchers and policy makers.

TL;DR: In this article, a new index for the hydromorphological assessment of Italian rivers has been developed for the EU Water Framework Directive requirements, but its use can be extended to other applications in river management.

TL;DR: A new algorithm to solve the basic stream power equation, which governs channel incision and landscape evolution in many geomorphic settings, is presented, which is highly efficient and unconditionally stable.

TL;DR: In this paper, the authors present an application of mathematical graph theory to explore the network structure of coarse sediment pathways in a central alpine catchment, using numerical simulation models for rockfall, debris flows, and (hillslope and channel) fluvial processes.

TL;DR: A review of the status of soil erodibility evaluations and determinations based on 80 years of upland area erosion research mainly in China and the USA is presented in this article.

TL;DR: In this paper, a field study was conducted to better understand the process of cascading landslide dam failures and the formation of debris flows, and the results showed that five key modes in Luojiayu and two modes in Sanyanyu gully accounted for the scale amplification of downstream debris flows in the Zhouqu event.

TL;DR: In this paper, a multitemporal LiDAR-derived DEM of Difference (DoD) is used to quantify morphological change in two study reaches with contrasting valley settings (confined and unconfined).

TL;DR: In this paper, the authors examined the influence of reservoir operations (filling and drawdown) on Mt. Toc slope stability and concluded that the main destabilizing factor that favored the 1963 Vajont landslide was the reservoir-induced water table that formed as a consequence of rapid seepage inflow within the submerged toe of the slope.

TL;DR: In this paper, the authors examine issues relating to the interpretation and dendrogeomorphic dating of mass movements and conclude that different thresholds need to be used for different processes and different periods of reconstruction, especially for the early stages of the reconstruction when the number of potentially responding trees will be much smaller.

TL;DR: In this paper, a largely automated technique for the mapping of landslide surface fissures from very high-resolution aerial images was proposed, which includes the use of filtering algorithms and post-processing of the filtered images using object-oriented analysis.

TL;DR: In this article, a landslide susceptibility map was made using the weights-of-evidence method, wherein weights were derived using the semi-automatically prepared historical landslide inventories combined with a series of pre-disposing factor maps.

TL;DR: In this article, the primary means by which lidar has and will continue to transform how geomorphologists study landscape form and evolution are identified: (i) lidar serves as a detailed base map for field mapping and sample collection, (ii) lidars allows for rapid and accurate description of morphologic trends and patterns across broad areas, which facilitates model test- ing through increased accuracy and vastly increased sample sizes, and (iii, lidar enables the identification of unanticipated landforms, including those with unknown origin.

TL;DR: Hydrodynamic results demonstrate that plant species traits interact with environmental conditions in creating scale-dependent feedbacks explaining why the effects of vegetation on landscape formation in saltmarshes are species specific.

TL;DR: In this paper, the authors examine the effects that development and human modifications to the coastline have on the measurements of regional shoreline change and find that even modest amounts of development influence the rates of change and the human imprint override the geomorphic signal.

TL;DR: In this article, a simple, robust methodology (ChanGeom) was proposed to extract continuous channel width and centerline datasets for single-thread channels using freely available high-spatial resolution imagery currently available in Google Earth and Bing Maps.

TL;DR: In this paper, the authors investigated the temporal and spatial dynamics of a 7.5 km2, partly drained thermokarst basin (alas) using field investigations, remote sensing, Geographic Information Systems (GIS), and sediment analyses.

TL;DR: In this paper, the authors synthesize the research in glacial geomorphology and geochronology in northern Spain, with special attention to the evidence of local glacier maximum extent earlier than the global LGM of MIS 2 (18-21-ka BP).

TL;DR: In this article, a multivariate technique was used to analyze high-resolution bathymetric data from the North Passage of Changjiang (Yangtze River), which is the vital shipping channel in the mouth region and for the entire Changjiang waterway.

TL;DR: In this paper, a regional inventory of rock glaciers is presented for the Lombardy region, central Italian Alps to identify and classify the landforms, inspecting three sequential air-orthophoto mosaics and a 2m-DSM.

TL;DR: The authors examines the evolutionary paths of some transgressive dune fields that have formed on different coasts of the world, and presents some initial conceptual models of system dynamics for transgressive Dune sheets and Dune fields.

TL;DR: In this article, the authors used multivariate statistics applied to five environmental variables to compare conditions across 36 watersheds in the Wood River basin in southwest Alaska, and found that the environmental conditions in the first two axes of a principal components analysis (PCA) explained 76% of the variation in summer temperature among streams and 45% of variation in spawn timing of sockeye salmon.

TL;DR: In this paper, the decadal behaviour of 58 sandy beaches along the 150 km long South-Atlantic coast of Spain, between the Guadalquivir river mouth and the Strait of Gibraltar, is analyzed in order to investigate the relationships between shoreline change patterns and the diverse morphological and dynamic factors controlling beach evolution in the area.

TL;DR: In this article, the authors employ 47 cosmogenic isotope exposure ages obtained for 17 catastrophic postglacial rock-slope failures in the Scottish Highlands to test models of changes in RSF frequency since deglaciation.

TL;DR: In this paper, the authors conclude that a combined effect of complex rupture dynamics and topography primarily control this previously rarely documented landslide pattern, and they conclude that lower static stress drop, mean fault displacement, and blind ruptures of the 2010 Haiti earthquake resulted in fewer, smaller and more symmetrically distributed landslides than previous studies would suggest.

TL;DR: A detailed examination of the topographic features of 10 large landslides before Typhoon Talas, recorded on 1-m DEMs based on airborne laser scanner surveys, showed that all landslides had small scarps near their future crowns prior to the slide, and one landslide had linear depressions along its future crown as precursor topographical features as discussed by the authors.