Lithology, through its influence on sediment production, may have an important effect on the size of alluvial fans and, hence, on fan-basin morphometric relations. The purpose of this study is to evaluate the influence of lithologic erodibility
on the relation between alluvial fan area and drainage basin area.
Alluvial cone ; Fluvial processes ; Hydrology ; Mathematical model ; Model ; Sedimentology
A mathematical model which estimates the scale-independent sediment surface profile of alluvial fans has been developed. This model utilizes a diffusive sediment transport model and an unsteady, radial flow, conservation relationship. The model
suggests that the overall dimensionless morphology of alluvial fans is governed more by fundamental diffusion principles in sediment deposition than by individual environmental or basin characteristics. A preliminary comparison indicates that this model
provides useful qualitative and quantitative information relating to alluvial fan process and morphology.
karst area two types of alluvial fans appear on carbonate bedrock. Members of the first type are ordinary alluvial fans with active alluvial processes where flysch derived sediment covered limestone surface in a distinct fan shape. - (L'A.).
In studying alluvial deposits from the Torre del Loro Beach near Huelva, southwestern Spain, it has been possible to describe not only processes and morphology of alluvial fans, but to track evolutionary changes in the morphology of the alluvial
Cone aluvial do Taquari, unidade geomorfica marcante na planicie quaternaria do Pantanal. (Cône alluvial du Taquari, unité géomorphologique remarquable dans la plaine quaternaire du Pantanal)
Description des unités géomorphologiques du cône alluvial du Taquari dans le Pantanal, qui correspond à une intense activité érosive torrentielle sub-récente. (ASA).
Field and modern analytical methods have shown that Floodplain soils with a pronounced A2 horizon are a large group of soils that occur under various ecologic conditions. They include Alluvial Sod Acid and Meadow Acid residual podzolized or residual
Gray Forest soils, Alluvial Sod-Podzolic and Alluvial Gray Forest residual-sod soils, Alluvial Pseudopodzolic (Pseudogley) soils, Alluvial Sod-Podzolic soils, and Alluvial Gray Forest soils. Classification and nomenclature of these soils should take
Morphology and development of an alluvial fan in a permafrost region, Aklavik Range, Canada
Alluvial cone ; Arid area ; Canada ; Gelifluction ; Periglacial features ; Permafrost ; Sedimentology ; Snow
The objectives of this study are to describe the morphology and sedimentology of an alluvial fan, the Mount Goodenough North fan, in a permafrost region; and to interpret the processes responsible for the development of the fan, using both direct
The age of alluvial fan deposition at a site in the southern uplands of Scotland
Alluvial cone ; Archaeology ; C 14 dating ; Dating ; Fluvial processes ; Palynology ; Scotland ; Stratigraphy ; United Kingdom
The age of a large alluvial fan debouching onto the valley floor of the River Tweed, in southern Scotland, and the sequence of events relating to this, are investigated using geomorphological, sedimentological, palynological, archaeological
Grâce à 8 datations au 14C d'échantillons de bois des dépôts de terrasse et du cône alluvial, identifie deux phases d'érosion Holocène| l'une vers 5400 BP mais avant 1900 BP, l'autre vers 900 BP. - (CB)
Alluvial channels ; Alluvial cone ; Artifact ; C14 dating ; Coastal environment ; Fluvial dynamics ; Holocene ; New Zealand ; Quaternary ; River bed ; Stream
This paper gives a brief synopsis of alluvial fan and river course development during latest Holocene time, and then discusses the distribution of known Polynesian sites, relative to paleochannels. The sites are interpreted as being of early
Geomorphology and sedimentology of the Toro Amarillo alluvial fan in humid tropical environment, Costa Rica
Costa Rica ; Cône alluvial ; Eruption volcanique ; Granulométrie ; Géographie de l'Amérique ; Géomorphodynamique ; Météorisation ; Sédimentologie ; Toro Amarillo ; Zone intertropicale
Caractéristiques géomorphologiques et sédimentologiques du cône alluvial Toro Amarillo situé dans un milieu tropical humide. De courtes périodes actives sont séparées par de longues périodes inactives caractérisées par l'érosion météorique des
sédiments. Les manifestations volcaniques de 1963-1965 ont produit d'importants changements dans les caractéristiques de ce cône alluvial.
Flooding of rivers in India is linked with the peak monsoons. In this study, the slackwater deposits in the alluvial reaches of the Mahi river basin have been documented. These occur in the ravines incised during the early Holocene on an alluvial
Rational regime model of alluvial channel morphology and response
A theoretical model is developed for predicting equilibrium alluvial channel form. The concept of greatest relative stability, achieved by maximizing resistance to flow in the fluvial system, is presented as the basis for an optimization condition
for alluvial systems. Discharge, sediment supply (quantity and calibre) and valley gradient are accepted as independent governing variates. The model is used to define a dimensionless alluvial state space characterized by aspect ratio, relative roughness
Relict alluvial fans of Matarsko Podolje and Vrhpoljska Brda, Slovenia
Alluvial cone ; Carbonate rock ; Geomorphogenesis ; Geophysics ; Inheritated geomorphological features ; Karst ; Karstification ; Slovenia
The main aim of this paper is description of alluvial fans and relict alluvial fans as contact karst features and to provide some morphological and morphometric properties of the fans. The purpose of the research is to deduct on basis of fieldwork
data in the area of Matarsko podolje in western Slovenia and in its northern extension, Vrhpoljska brda, which are the mechanisms of alluvial fan formation and mechanisms and reasons for transformation to the relict ones. The aim is also to provide some
evidence why on the contact karst alluvial fans instead of blind valleys are formed.