(generally the last 100 years); define the general temporal trends of channel changes and the different styles of adjustment; compare the morphological changes with those observed in fluvial systems outside Italy.
Historic hydrographic surveys (1:20,000) from the late 1800s and early 1900s document the natural channel morphology of the Lower Mississippi, and are used to construct a 1225-km profile of the channel thalweg. This study documents the pool-riffle
morphology within a large fine-grained channel, and illustrates the importance of these features within the context of meandering processes. Findings suggest that the pool-riffle adjustment of meander bends occurs synchronously with planform adjustment
The A. examines spatial patterns of widening and incision in 3 tributary streams of the Lower Hatchie River (west Tennessee) with similar land use history and geology, using w/d ratios calculated from field measurements of channel morphology
The effect of check dams on the bed stability of torrential channels have been analysed in several tributary basins of the Segura and Guadalentín rivers. The AA. evaluate the impact of every check dam on the bed morphology, distinguishing
This article examines the long-term effects of bank-cover deflectors on the physical fish habitat and on the channel morphology. The study was conducted on Lawrence Creek, where trout habitat had been affected negatively by intense cattle grazing
. Data on the physical habitat and on channel morphology were collected on a 600-m-long reach in 1963 (immediately prior to the rehabilitation work), in 1966, and in 1999, to evaluate the adjustments. In the morainic section, most structures are no longer
Morphological responses and sediment processes following a typhoon-induced dam failure, Dahan River, Taiwan
Ajustement fluvial ; Cours d'eau ; Dahan River ; Date 2007 ; Géométrie hydraulique ; Rupture de barrage ; Taïwan ; Transport sédimentaire ; Typhon
and spatial patterns in morphology and likely sediment transport regimes. Results document the rapid response of the reservoir and downstream channel, which occurred primarily through incision and adjustment of channel gradient. Hydraulic simulations
, valley configuration, and distance from the dam is needed to explain the rate and pattern of morphological changes across study periods.
While upland catchment hydrology and the implications of climate and land-use change have received much attention in recent decades, in-channel interactions between sediment transfer and morphological change have been relatively neglected
Growth and internal spatial dynamics of this state capital and manufacturing center. Suburban expansion and ribbon development since World War II have morphologically transformed Chihuahua. - (DWG)
Beijing ; China ; Demographic change ; Model ; Polycentrism ; Suburbanization ; Urban area ; Urban density ; Urban growth ; Urban morphology ; Urban structure
plus variées. Test de plusieurs fonctions de densité. Un modèle monocentrique des densités s'ajuste bien en 1982, un modèle à deux centres en 1990 et un modèle à sept centres en 2000 : il y a donc transition de la forme urbaine vers le polycentrisme.
Adaptation ; Ajustement fluvial ; Aménagement hydraulique ; Capacité de charge ; Colorado ; Coulée de débris ; Cours d'eau ; Dynamique fluviale ; Etats-Unis ; Géométrie hydraulique ; Parc national ; Rocky Mountains ; Transport sédimentaire
, and channel morphology and stability were monitored on Lulu Creek and the Colorado River from 2004 to 2011. Dominant channel response following the debris flow within Lulu Creek included step development, bed armoring, and channel widening. Lulu Creek