Showing papers in "Geomorphology in 2009"

TL;DR: For example, the authors showed that after the Three Gorges Dam impoundment in 2003, sediment discharge in the upper reaches of the Yangtze River (Changjiang) decreased by 60% and the hysteresis of seasonal rating curves shifted from clockwise to counterclockwise.

TL;DR: A description of the coastal erosion and boulder deposition induced by the 2004 tsunami in the Lhok Nga Bay, located to the West of Banda Aceh (northwest Sumatra) is given in this article.

TL;DR: In this paper, the authors illustrate the importance of considering the influence of tectonic structures not only on three-dimensional kinematic release but also in the reduction of rock mass properties due to induced damage.

TL;DR: In this article, the authors quantified survey strategy and interpolation error for a gravel bar on the River Nent, Blagill, Cumbria, UK five sampling strategies were compared: (i) cross section; (ii) bar outline only; (iii) bar and chute outline with spot heights; and (iv) aerial LiDAR equivalent, derived from degraded terrestrial laser scan (TLS) data Digital elevation models were then produced using five different common interpolation algorithms.

TL;DR: In this article, the authors compared the scenarios obtained by assuming control and preventive measures and actions, as well as actual conditions generated by forest fires, also in the presence of conditions of maximum rainfall erosion.

TL;DR: In this paper, LiDAR-derived digital elevation models of the Puget Sound lowlands, Washington, and the Tualatin Mountains, Oregon were used to quantify and automatically map the topographic signatures of deep-seated landslides.

TL;DR: In this article, the authors measured wind flow and sediment transport over a beach and foredune at Greenwich Dunes, Prince Edward Island National Park, with the express purpose of addressing these complex interactions.

TL;DR: In this article, a high-resolution remote sensing system for aerial surveys by blimp or kite has been developed which meets spatial and temporal image resolutions required for short-term gully monitoring.

TL;DR: In this article, a decision tree model was proposed to analyze landslide susceptibility in a wide area of the Akaishi Mountains, Japan, and the results indicated that the decision-tree model has appropriate accuracy for estimating the probabilities of future landslides.

TL;DR: In this article, the authors used LiDAR-derived Digital Terrain Models (DTMs) with a spatial scale between 1 and 30m to find the optimal scale for observation of dominant landform processes in a headwater basin in the eastern Italian Alps.

TL;DR: In this article, the authors developed an accurate and efficient method of data integration, processing and generation of a landslide susceptibility map using an ANN and data from ASTER images, which is more than 90% accurate in determining the probability of landslide occurrence.

TL;DR: In this article, the locations of potential groundwater springs were mapped in an area of 68 km 2 in the Northern Apennines of Italy based on WofE and RBFLN.

TL;DR: In this paper, the application of terrestrial laser scanning (TLS) to determine the full population of grain roughness in gravel-bed rivers was demonstrated, where a total of 3.8 million data points were retrieved from a gravel bar surface at Lambley on the River South Tyne, UK.

TL;DR: In this paper, LiDAR topographic data along the south-central San Andreas Fault (SAF) along the southern Cholame segment is used for fault trace mapping.

TL;DR: In this article, a mean of 8900 ± 700 years was calculated for the Flims landslide, which is consistent with a single failure event and suggests that the erratics and patches of till lying on the landslide debris must have been carried piggy-back on top of the landslide rather than having been deposited by the late Pleistocene Vorderrhein Glacier.

TL;DR: In this article, a multi-scale approach based on hydrological connectivity was proposed to model runoff and erosion for a semi-arid catchment in Southeast Spain, where vegetation patches and agricultural terraces are the relevant sinks at the plot and hillslope scales.

TL;DR: Optically stimulated luminescence (OSL) dating of young (< 1000 years) sediments is used increasingly in a wide variety of late-Holocene studies as a mean of establishing contemporary sedimentation rates or the timing of sediment deposition as mentioned in this paper.

TL;DR: In this article, the formation of elongate ridges (and their expressions as flowbands, aligned hummocks, or distal lobes and digits) in both laboratory and field environments suggests they represent an intrinsic tendency of granular flows in a wide range of situations.

TL;DR: In this article, the structural features of the Frank Slide were investigated using a digital elevation model (DEM) using new landscape analysis techniques, including bedding, control part of the slope morphology, and three main joint and fault sets.

TL;DR: In this article, the application of several geomorphic indices (hypsometric curve analysis, normalized stream-length gradient, and valley width-to-valley height ratio) to the drainage network of the southern limb of the Sierra de Las Estancias antiform (Internal Zones, eastern Betic Cordillera), where low-rate active folding has been recognized, allows us to investigate the suitability of these indices to identify active structures in such a scenario.

TL;DR: In this paper, the authors investigate the spatial distribution of tidal distortion and asymmetry in the Dee estuary, UK, by 3-dimensional numerical modelling methods and show that shallower intertidal areas (sand and mud banks) were the most tidally asymmetric, showing flood dominance.

TL;DR: In this article, a Monte Carlo style mixing model is used to predict the relative contribution of both the spatial (geological) sources and erosion types to the Fitzroy River watershed, and the results indicate that sheetwash and rill erosion from uncultivated land (i.e., grazed pasture/woodland) is a comparatively minor contributor of sediment to the river network.

TL;DR: Hypogenic speleogenesis is the formation of solution-enlarged permeability structures by waters ascending to a cave-forming zone from below in leaky confined conditions, where deeper groundwaters in regional or intermediate flow systems interact with shallower and more local groundwater flow systems as discussed by the authors.

TL;DR: In this paper, the surface textures of a 5 km2 steepland area in Japan were investigated using the eigenvalue ratio and slope filters calculated from a very high resolution LiDAR-derived DEM.

TL;DR: In this paper, the authors investigate the case of the Messinian Salinity crisis that was characterized by the extreme base level fall (1500 m) of the Mediterranean Sea at the end of the Miocene.

TL;DR: In this paper, the U.S. National Research Council's committee on Challenges and Opportunities in Earth Surface Processes (COPP) developed a white paper for the 38th Binghamton Geomorphology Symposium, "Complexity in Geology,” held at Duke University in October 2007.

TL;DR: In this article, the authors reviewed how natural and human factors have controlled the Po Delta through time and discussed management strategies taking into account the importance of the human factor and the potential effects of climatic changes.

TL;DR: In this article, the application and quality of digital elevation models (SRTM and ASTER DEMs), high resolution satellite imagery (Quickbird) and GIS techniques for the detection and mapping of karst landforms (mainly enclosed depressions) at different scales in the Ida Mountains of Central Crete.

TL;DR: In this paper, the relative importance of changes in land use and climate on suspended sediment yield (SY) on millennial timescales in the Meuse basin was investigated, where a spatially distributed soil erosion and sediment delivery model (WATEM/SEDEM) was used to simulate SY in three time-periods: 4000-3000 BP, 1000-2000 BP, and the 21st Century.