Coastal geomorphology ; Comparative study ; Earth surface processes ; Fluvial processes ; Geomorphic cycle ; Initial conditions ; Landscape ; Model ; Numerical model ; Self-organizing behaviour ; Topography ; Valley
The AA. illustrate the influence of initial conditions with examples drawn from two well-studied systems : the formation of ridge-and-valley topography through the coupled evolution of soil-mantled hillslopes and fluvial channels, and the emergence
Analysis of the fault pattern in the Lower Lanzo Valley (italian Western Alps) : a multi-scale integrated approach
This work combines, at different scales, field mapping, detailed structural analysis, satellite images (Landsat TM and ASTER) and aerial photos interpretation for the study of the fault network affecting the Lower Lanzo Valley (Turin), a key-area
A geomorphosites selection method for educational purposes: a case study in Trebbia Valley (Emilia Romagna, Italy)
of these results, some sites along the Trebbia Valley have been selected to create an educational itinerary, including fieldwork, to be proposed to a first level of secondary school. - (NF)
Post-glacial range of variability in the Conejos River Valley, southern Colorado, USA : fluvial response to climate change and sediment supply
The AA. examine the natural range of variability in the Conejos River Valley, southern Colorado, through documentation of terrace morphostratigraphic and sedimentological characteristics as well as through investigation of sediment contributions
Progressive failure of sheeted rock slopes : the 2009–2010 Rhombus Wall rock falls in Yosemite Valley, California, USA
The AA. present high-resolution photography, video, and laser scanning data that document spatial and temporal patterns of a 15-month-long sequence of at least 14 rock falls from the Rhombus Wall, a sheeted granitic cliff in Yosemite Valley
Late Holocene history of the Moldova River Valley, Romania
The AA. describe the results of geomorphological, sedimentological and 14C analyses of Late Holocene fluvial sequences in the Moldova River Valley, originating from the Carpathians mountains and known for the extent of its large floodplain
The AA. focus on 2 low-gradient broad valleys, Beaver Meadows and Moraine Park, in Rocky Mountain National Park (Colorado, USA). Both valleys experienced a dramatic decrease in beaver population in the past century. They examine the geomorphic
by beaver ponds and the volume of fine sediment trapped. Channel complexity decreased significantly as surveyed beaver population decreased. These findings underscore the importance of understanding the historical range of variability of valley bottom
The AA. studied 3 main sections in the Moselle valley (northeastern France) by a multi-proxy approach combining morphology, sedimentology, archaeological evidence, historical archives, and dating. The geochronological framework was based
changes such as the Little Ice Age had a minor influence on floodplain aggradation (e.g. in grain size or sedimentation rates) in the Moselle valley and were only able to affect the fluvial style. This provides evidence that the reworking of sediments
is the main fluvial process at short timescales in the valley floors of the Moselle catchment. In contrast, anthropogenic forcing seems important not only during recent centuries but also since Roman times.
carbonate cover, dissected by faults and river erosion, and are now completely isolated hydrological systems. Most of these rivers have cut valleys more than 200 metres deep into the Palaeozoic basement rocks, whose slopes are often characterised
by landslides, suggesting their recent oversteepening. Some valleys, on the contrary, have not reached the base of the carbonate sequence and appear to be suspended above the deeper incisions, apparently disconnected by them. Several subhorizontal surfaces can
is directly related to decreasing precipitation with distance to the west of the Mississippi River valley. Many species, however, have abrupt western range boundaries related to physiography and hydrogeomorphic processes. Also, riparian habitats within stream
valleys extending westward from the Coastal Plain provide suitable habitats for trees in the dry regions of the Great Plains. The presence of riparian trees in this region is determined largely by the presence or absence of groundwater conditions necessary
This study documents the effect that a series of discontinuous gullies, located in the semi-arid Karoo (South Africa), had on local valley morphology and landscape evolution. The longitudinal and cross-sectional morphology of 2 discontinuous gully
systems in one valley on Gordonville farm were accurately surveyed. In addition, the sedimentology of 8 cores was described and sediment particle size and percentage organics determined, while the activity of the radioactive element 210Pb was measured in 3
Braided channel ; Channel ; Channel geometry ; Classification ; Fluvial geomorphology ; Fluvial hydrology ; Human impact ; Hydraulic works ; Natural hazards ; River bed ; Sediment transport ; Stream ; Stream flow ; Valley ; World
A hierarchy of classifications of river channels based on their morphological properties is presented in the study at three scales : the shape and character of the valley, the channel pattern and bedforms. Single-thread channels are subdivided
, i.e. dissolution and collapse down to the Pliocene water table associated first with the ancestral allogenic and exoreic River Murray that then flowed in shallow valley graded to a relatively high regional baselevel, and in later Pliocene times
to the estuary that inundated the valley. During the Quaternary the Plain was left high and dry (and converted to the High Plain) by the incision of the Murray and becoming graded to lower baselevels and water tables. Conservation was enhanced by the widespread