inscription
Portail d'information géographique

Résultats de la recherche (2039 résultats)

Affinez votre recherche

Par Collection Par Auteur Par Date Par Sujet Par Titre Par ville ? Par pays ? Par continent ?
  • Geomorphic field experiments. Inventory and prospect
  • Model experiments on mottle formation simulating field conditions
  • A field experiment of cusp formation on a coarse clastic beach using a suspended video-camera system
  • Beach cusp ; Coastal environment ; Earth surface processes ; Field experiment ; Japan ; Micromorphology ; Pacific Region ; Photointerpretation
  • Providing a Latin American cultural field experience
  • Evaluation by instructors involved of an interdisciplinary field course to Latin America, including classroom component, field component and logistics.―(DWG)
  • Focus on geography - team themes and field experiences
  • Ideas on the different kinds of geography field trips for U. S. middle-school students. - (DWG)
  • How to make a palsa: a field experiment on permafrost formation
  • This paper presents a natural scale field experiment on palsa formation. In this study only one parameter, which was thought to be critical one in this environment for the formation of permafrost is varied. The factor was snow depth, which
  • Field experiments on benthic ecosystems in Analysis of marine ecosystems.
  • The refugee experience: defining the parameters of a field of study
  • Dry aeolian dust accumulation in rocky deserts : a medium-term field experiments based on short-term wind tunnel simulations
  • Aeolian dust ; Aeolian features ; Arid area ; Desert ; Erosion ; Field experiment ; Geomorphometry ; Israel ; Negev ; Spatial distribution
  • region are first investigated separately and then combines into a new pattern of expected accumulation. The expected pattern is then tested in a medium-term experiment carried out during the dry season. The predictions are tested in a field experiment set
  • Assessment of detachment and sediment transport capacity of runoff by field experiments on a silt loam soil
  • Belgium ; Cultivated land ; Experiment plot ; Loam ; Overland flow ; Rainfall simulation ; Runoff ; Sediment transport ; Soil erosion
  • The aim of this study is to examine the detachment and transport capacity of runoff using rainfall simulations and overland flow experiments on small field plots. A simple regression equation was derived to estimate transport capacity (Tc) for both
  • bare and covered soil. Although Tc can be assessed more easily in laboratory experiments, the applicability of the results to field conditions remains questionable. The detachment by runoff constitutes only part of the transported sediment. Interrill
  • Field and computer simulation experiments on the formation of desert pavement
  • A series of rainfall simulation experiments was carried out at the Walnu Gulch Experimental Watershed, Tombstone, Arizona, to observe the speed at which desert pavement surfaces could be re-established following disturbance. The results
  • of these field simulations were then compared with numerical simulations to check the extent to which the simulation model of Wainwright et al. (1994) reproduces the effects of raindrop erosion.
  • Some methods of directly assessing water erosion of cultivated land. A comparison of measurements made on plots and in fields
  • Agropedology ; Experiment plot ; Gully erosion ; Methodology ; Rill wash ; Soil erosion ; Splash
  • in farmers' fields are then described and the results from plot-based experiments are compared with them.
  • Here, brief reference is made to ways of directly measuring soil erosion and their suitability for use in farmers' fields. Some comments are made on the technique most widely used to measure erosion: experimental plots. Measurements of erosion made
  • Bericht vom Treffen der Commission on Field Experiments in Geomorphology in Rio de Janeiro. (Compte rendu de la rencontre de la Commission sur les expérimentations en géomorphologie à Rio de Janeiro)
  • Coping with hunger : hazard and experiment in an African rice-farming system.
  • A case study of a Mende village in Sierra Leone based on field work undertaken in 1981-3 and 1985 indicates that the rice farmers are themselves innovators and their expertise is often more valuable than that of scientific advisors. - (EMS)
  • Field and computer simulation experiments on the formation of desert pavement
  • A series of rainfall simulation experiments was carried out at the Walnut Gulch Experimental Watershed, Tombstone, Arizona, to observe the speed at which desert pavement surfaces could be re-established following disturbance. The results were
  • Field and laboratory experiments on the evolution of microsteps and scour channels on low-angle slopes
  • This study reports on field runon experiments on 30 m plots at Baringo, Kenya and laboratory simulated rainfall experiments on a 25 m flume, designed to provide information on characteristic hydraulic conditions, the processes involved in microstep
  • Problem-based interdisciplinary field-based courses: reflections from southern African experiences
  • This paper reports upon seven field-based problem-oriented, interdisciplinary, university courses held within southern Africa concerning natural resource management and sustainable land use. The long-term commitment to the development
  • The Dragon and the Anchor: Using a field experience, journalizing and writing to teach the five geographic skills sets
  • This article shows how a journal, kept by the author while on an advanced study institute to Russia in 1996, was used to write an original short story based on field work there and that integrate five sets of geographic skills into the story. - (DWG)
  • The value of single-site ethnography in the global era : studying transnational experiences in the migrant house
  • The aim of the paper is to show the value of doing single-site ethnography in the field of transmigration studies. It concentrates on migrants' personal experiences of living in-between two countries. The A. shows how both the relationality
  • and emotionality of transnational experiences can be studied in one place : the migrant house.
  • A field method for the concurrent measurement of fine sediment content and embryo survival in artificial salmonid redds
  • Canada ; Ecology ; Field experiment ; Grain size distribution ; Quebec ; Sediment transport ; Sedimentology
  • The AA. present a new field method which allows concurrent measurement of fine sediment content and embryo survival in an incubating environment reproducing, as closely as possible, the morphology and grain size composition of a natural salmonid