Showing papers in "Geomorphology in 2006"

TL;DR: The hydrology and geomorphology of large rivers in America reflect the pervasive influence of an extensive water control infrastructure including more than 75,000 Dams as mentioned in this paper, and the hydrologic changes by dams have fostered dramatic geomorphic differences between regulated and unregulated reaches.

TL;DR: In this paper, the authors provide a quantitative assessment of the human impact on global land-ocean sediment fluxes and the net effect of increasing and decreasing fluxes in response to human impact.

TL;DR: In this paper, a landslide susceptibility model for the Collazzone area, central Italy, was presented, and a framework for evaluating the model reliability and prediction skill was proposed to evaluate the model.

TL;DR: In this paper, the authors consider the human role in changing river channels and propose a model to understand the relationship between changes at channel, reach, and network scales, with the most extreme effects produced by building activity and urbanisation.

TL;DR: In this article, the authors examined the response of an entire fluvial network, as recorded by 236 active knickpoints distributed within the Waipaoa River on the North Island of New Zealand.

TL;DR: In this paper, the surface morphology of two canyon-rim landslides in southern Idaho was examined using airborne laser altimetry (LiDAR) and field observations for the currently active landslide, and the results suggest that topographic elements are related to the material types and the type of local motion of the landslide.

TL;DR: In this paper, an automated classification system of landform elements based on object-oriented image analysis is presented, which can be used for almost any application where relationships between topographic features and other components of landscapes are to be assessed.

TL;DR: In this paper, a compilation of research results from more than 100 studies conducted in a range of areas (58 addressing morphological change) was used to describe how urbanization has transformed river landscapes across Earth's surface.

TL;DR: In this article, the authors analyzed how hydrologic regimes vary with land use in four large watersheds that span a gradient of natural land cover and precipitation across the continental United States.

TL;DR: In this article, the authors evaluated the accuracy of interpolation techniques for the generation of digital elevation models (DEMs) in relation to landform types and data quantity or density.

TL;DR: In this paper, a statistical multivariate method, i.e., rare events logistic regression, is evaluated for the creation of a landslide susceptibility map in a 200 km2 study area of the Flemish Ardennes (Belgium).

TL;DR: In this article, the authors used multivariate statistical analysis (factor analysis), the interactions between factors and landslide distribution were tested, and the importance of individual factors for landslide occurrence was defined, based on the statistical results several landslide susceptibility models were developed using the Analytical Hierarchy Process method.

TL;DR: In this article, an analysis of channel responses to antrhopogenic and natural disturbances is presented for fluvial systems in the mid continent and Pacific Northwest, USA, and central Italy.

TL;DR: In this article, 14C and 137Cs isotopic dating methods are used along with ages of culturally related phenomena associated with mining and agriculture to determine rates of sedimentation and morphologic change for a reach of the upper Mississippi River and adjacent tributaries in southwestern Wisconsin and northwestern Illinois.

TL;DR: In this article, the authors investigated the impact of root density and root length density of grass on the erodibility of root-permeated saturated topsoils and found that grass roots are very effective in reducing soil detachment rates.

TL;DR: In this article, the authors investigated the sources and implications of georectification error in the measurement of lateral channel movement by testing how the number (6 − 30) and type (human versus natural landscape features) of ground-control points (GCPs) and the order of the transformation polynomial (first-, second-, and third-order) affected the spatial accuracy of a typical georctified aerial photograph.

TL;DR: In this paper, the authors identify and assesses the controls on hydraulic erosion of cohesive riverbanks on a 600m reach of an urban ephemeral stream with active bank erosion by separating estimated bank shear stress into four properties: magnitude, duration, event peak, and variability.

TL;DR: The long history of substantial human impacts on the landscape of the Mediterranean region, and their effects on fluvial systems, is documented in this paper, where the importance of analysing the connectivity within different land units and of the spatial position of human activity within a catchment is illustrated.

TL;DR: The Atacama Desert of northern Chile and southern Peru has one of the longest histories of arid conditions known as mentioned in this paper, and the long history of aridity raises the possibility that supergene mineralisation, under the appropriate conditions, form in arid environments, instead of requiring humid conditions.

TL;DR: In this paper, a geomorphological approach to the management of rivers contaminated by metals is outlined and four emerging research themes are highlighted and critically reviewed, including response and recovery of river systems following the failures of major tailings dams, effects of flooding on river contamination and the sustainable use of floodplains, new developments in isotopic fingerprinting, remote sensing and numerical modelling for identifying the sources of contaminant metals and for mapping the spatial distribution of contaminants in river channels and floodplain; and current approaches to the remediation of river basins affected by mining, appraised in

TL;DR: In this article, the authors proposed a model to predict channel patterns in forested mountain river systems of the Pacific Northwest, USA, and found that the predicted spatial distribution of channel patterns reflects a downstream decline in channel slope, which is likely correlated with a declining ratio of bed load to suspended load.

TL;DR: In-stream macrophytes are typically abundant in nutrient-rich chalk streams during the spring and summer months and modify the in-stream environment by altering river flows and trapping sediments as mentioned in this paper.

TL;DR: The interaction between geomorphic and ecologic landscape components has been largely conceptualized as independent, whereas in this paper, the authors integrate these two independent perspectives within the framework of complexity theory and outline four themes that characterize complex systems in biogeomorphology.

TL;DR: In this article, the authors defined mountain streams as channel networks within mountainous regions of the world, and provided an overview of the relative intensity of human impacts to mountain streams by summarizing human effects on each of the major mountainous regions with respect to five categories: flow regulation, biotic integrity, water pollution, channel alteration and land use.

TL;DR: In this article, a method for applying the saltation-abrasion model at a landscape scale is developed, and use the model as a reference for evaluating the behavior of a wide range of alternative incision models, in order to consider the implications of the SABR model for predicting topographic steady-state channel slope.

TL;DR: The morphological response of intertidal bars to changing wave conditions is largely forced: bars build up and migrate onshore under calm waves, and are flattened and may migrate offshore during storms as mentioned in this paper.

TL;DR: In this paper, the results of an experiment to compare glacial geomorphology mapped from remotely sensed imagery with 1 ǫ: 10,000-scale field mapping were presented, validated against high-resolution LiDAR imagery of an area glacierized during the Younger Dryas and found to provide an essentially reliable, if not complete, representation of the glacial terrain.

TL;DR: In this article, a semi-automated method is presented to recognize and spatially delineate geomorphological units in mountainous forested ecosystems, using statistical information extracted from a 1m resolution laser digital elevation dataset.

TL;DR: In this article, the causal factors of these landslides, mostly debris slumps, were mapped and investigated, and it was shown that landslides dominate on steep concave slope segments that are oriented to the dominant rainfall direction (northeast) and at a relatively large distance from the water divide.

TL;DR: In this article, the geochemistry of surface sediment samples from Daihai Lake in north China is analyzed for 10 major and 30 trace elements, organic carbon, and nitrogen and for 87Sr/86Sr ratios in silicate fraction (acid insoluble, AI) and carbonates (acid soluble, AS).