Geographical education and film: an experimentalcourse
Audiovisuel ; Coursexpérimental ; Enseignement de la géographie ; Généralités sur la géographie
Description et analyse d'un coursexpérimental destiné à expliquer aux étudiants la nature du film et de la télévision et à souligner l'importance de ces moyens audio-visuels pour le géographe. L'article fait état de certaines stratégies
pédagogiques, de l'évaluation du cours et des projections qu'un tel type d'enseignement pourrait avoir. (OP).
Discussion of: experimental test of autosuspension (Southard and Mackintosh, 1981)
Autosuspension ; Charge en suspension ; Courant de turbidité ; Cours d'eau ; Formule de Bagnold ; Géographie physique ; Hydrodynamique ; Méthodologie ; Sédimentologie
Critique du test de Southard et Mackintosh (1981). Le critère d'autosuspension de Bagnold n'est pas suffisant pour expérimenter l'autosuspension.
Autosuspension ; Charge en suspension ; Charge solide ; Cours d'eau ; Expérimentation ; Géographie physique ; Hydrodynamique ; Technique de recherche
Le concept d'autosuspension signifie que le sédiment transporté sur une pente donne plus d'énergie au courant qu'il ne lui en ôte, permettant ainsi de très grosses concentrations. L'expérimentation prouve que cette notion est inexacte: la
Assessing potential abiotic and biotic complications of crayfish-induced gravel transport in experimental streams
Action biogène ; Biogéomorphologie ; Biomasse ; Charge solide ; Cours d'eau ; Dynamique des populations ; Expérimentation ; France ; Poisson ; Rhône ; Transport sédimentaire
Biogenic process ; Biomass ; Experimentation ; Fish ; France ; Population dynamics ; Rhône ; Sediment load ; Sediment transport ; Stream
factor that potentially affect crayfish behaviour, and in turn could complicate the crayfish-induced gravel transport. This study also assesses how crayfish abundance in terms of their biomass affects the gravel transport across a variety of experimental
Autosuspension ; Charge en suspension ; Cours d'eau ; Fluviatile ; Formule de Bagnold ; Géographie physique ; Méthodologie
Les expérimentations de Southard et Mackintosh prouvent uniquement que l'autosuspension n'apparaît pas dans les conditions de test car celles-ci sont basées sur la formule de Bagnold. Un critère de remplacement est proposé ainsi qu'une méthode de
Hydrologie radar : bilan et expérimentation en cours en France
Les travaux consacrés, au cours des dernières années en France, à l'utilisation hydrologique du radar ont mis en lumière l'intérêt potentiel mais aussi les limites de cette technique de mesure pour l'estimation quantitative et la prévision des
Aeolian features ; Belgium ; Experimentation ; Hill ; Loess ; Slope gradient ; Topography ; Wind ; Wind erosion
identical but isolated hills. The study is, of course, restricted since the total number of topographic combinations is unlimited, but the landform combinations investigated were selected such that, if topographic interference plays a significant role
[b1] N.F.W.O., Laboratory for Experimental Geomorphology, B-3000 Leuven, Belgique
Drainage network ; Experimentation ; Fluvial capture ; Fluvial erosion ; Fluvial processes ; Model ; Stream ; United States of America
Fifteen physical experiments on a stream table replicated four general mechanisms proposed to explain transverse drainage development, namely antecedence, superimposition, overflow, and piracy. The experimental design encompassed multiple strategies
Cours d'eau ; Ecoulement ; Erosion des berges ; Etats-Unis ; Expérimentation ; Infiltration ; Mississippi ; Modèle ; Propriétés du sol
Bank erosion ; Experimentation ; Infiltration ; Mississippi ; Model ; Runoff ; Soil properties ; Stream ; United States of America
Seepage flow and sediment concentrations were measured in situ at eight locations along the banks of a deeply incised stream in northern Mississippi. Using field observations as a guide, lysimeter experiments were conducted to experimentally
Flume experiments, in which the middle section of an erosion channel is displaced horizontally, have been conducted to assess the response of streams to horizontal displacement by a strike-slip fault. The experimental erosion channel was developed
Cryoturbation ; Expérimentation ; Expérimentation de laboratoire ; Géographie physique ; Géomorphodynamique ; Limon ; Loess ; Périglaciaire ; Technique de recherche
The experiment shows: (1) that considerable deformation can be progressive by produced in the course of freezing, without the material being liquified| (2) that the fine material tends to be displaced in the direction of advance of the freezing
Method of calculation of a quantitative parameter of soil erosion resistance is proposed : it is eroding flow rate in the course of sprinkling irrigation. The distorting impact of drops on the soil structure and their turbulizing effect
on the eroding water-flow have been taken into account too. The method has been aprobated on the run-off plots, in the course of field investigations on different soils. - (L'A.).
Bifurcation ; Channel geometry ; England ; Experimental catchment ; Leeds ; Model ; Runoff ; Stream ; Stream flow ; United Kingdom ; Yorkshire
Bifurcación ; Corriente de agua ; Cuenca experimental ; Escorrentía ; Escorrentíafluvial ; Geometria hidráulica ; Inglaterra ; Modelo ; Reino Unido
This paper presents results from an experimental study in the Leeds Experimental Basin where detailed three-dimensional (3D) velocity measurements were obtained at a total of 11 cross-sections through 2 idealized, geometrically symmetrical
Channel geometry ; Experimentation ; Grain size distribution ; Gravel ; Italy ; River bed ; Roughness ; Runoff ; Sicilia ; Spatial variation ; Stream ; Stream flow
The spatial variability of bed particles of a gravel-bed channel is analysed and treated experimentally in order to simulate the effects of the arrangement of coarse bed elements on the flow resistance law. The differences between the experimental
Channel geometry ; Experimentation ; Gravel ; Longitudinal section ; Model ; River bed ; Stream
This research presents flume studies designed to identify the processes responsible for step-pool formation. The experimental design includes a broad range of flow rates and sediment transport rates to address questions of how the step-pool bedform
develops and the channel conditions most likely to produce step sequences. The experimental design included flow rates that created active transport and deposition of all sediment sizes, including the step-forming grains. This research evaluates the pre