inscription
PORTAIL D'INFORMATION GÉOGRAPHIQUE

Résultats de la recherche (71 résultats)

Affinez votre recherche

Par Collection Par Auteur Par Date Par Sujet Par Titre
  • Fluvial adjustments to soil erosion and plant cover changes in the Central Spanish Pyrenees
  • Fluvial dynamics ; Meander ; Mountain ; Plant colonization ; Pyrénées ; Reforestation ; Sediment budget ; Soil erosion ; Spain ; Stream flow ; Watershed
  • Depopulation and farmland abandonment resulted in plant recolonization in formerly cultivated areas, causing a decrease in runoff and sediment yield. As a consequence, most Pyrenean rivers tend to reduce the width of the alluvial plain
  • 2006
  • Remote sensing based analysis of land cover and land cover change in Central Sulawesi, Indonesia
  • Indonesia ; Land use ; Plant cover ; Remote sensing
  • In this study, the author gains information about land cover and land cover change in Central Sulawesi on the basis of a Landsat 7/ETM+ time series. He applies a modern object-oriented approach which allows the analysis of non-spectral features (e.g
  • . shape, spatial relations, thematic data) and goes beyond the pure isolated statistical examination of each pixel's spectral values offered by traditional remote sensing techniques. The gathered results on land cover change provide essential information
  • 2006
  • Geology ; Geomorphology ; Landscape ; New Caledonia ; Ophiolite ; Plant cover ; Vegetation
  • 2006
  • Bioclimatology ; Climatic change ; Methodology ; Modelling ; Plant cover ; Uncertainty
  • 2006
  • Geographical information system ; Modelling ; Mongolia ; Periglacial features ; Permafrost ; Plant canopy ; Radiation ; Snow cover ; Soil temperature ; Spatial distribution
  • The aim is to present a coupling of topography and land cover parameters with ground surface temperatures, and to use this information to estimate ground surface temperature fields and spatial active layer variability at a regional scale
  • . The measurements at 17 locations over a 2-year period, in the Lake Hövsgöl area, were used to analyse the influence of vegetation, solar radiation, surface wetness and snow cover on the ground thermal regime.
  • 2006
  • Landsliding related to land-cover change : a diachronic analysis of hillslope instability distribution in the Sierra Norte, Puebla, Mexico
  • Deforestation ; Land use ; Mass movement ; Mexico ; Mountain ; Plant canopy ; Precipitation ; Puebla ; Remote sensing ; Satellite imagery ; Soil degradation ; Years 1990-99
  • The analysis involves comparing vegetation cover scenarios, particularly deforestation, using satellite images from 1989 and 1999 to examine land use and forest conditions prior and after the extreme rainfall event, October 1999, that triggered
  • 2006
  • Italy ; Land use ; Landscape ; Landscape dynamics ; Mediterranean Sea ; Plant canopy ; Research
  • Le signe LUCC (Land use and cover change, changements de l'utilisation du sol et du couvert) recouvre toutes les nuances de sens possibles. Les nombreuses contributions de ce volume cherchent à les montrer et à les mettre en évidence. Elles émanent
  • 2006
  • Africa ; Ecology ; Fire ; Mali ; Plant cover ; Policy ; Remote sensing ; Savanna ; West Africa
  • 2006
  • Cold area ; Comparative study ; Granite ; Lapland ; Limestone ; Plant canopy ; Soil properties ; Sweden ; Weathering
  • This paper reports the findings of a ten-year study of potential weathering of machine-polished dolomite, granite and limestone discs buried in shallow pits beneath a variety of vegetation cover types in Kärkevagge and on an adjoining ridge
  • 2006
  • Cultivated land ; Kenya ; Model ; Plant canopy ; Runoff ; Semi-arid area ; Soil erosion ; Soil properties ; Water erosion ; Watershed
  • , climate and land use conditions. Particular attention is given to the ability of the model to deal with different crop and vegetation covers.
  • 2006
  • Agricultural retreat ; Altitudinal zonation of vegetation ; Land use ; Land utilisation ; Mountain ; Phytogeography ; Plant colonization ; Plant cover ; Plant succession ; Reforestation ; Spain ; Spatial variation ; Valley ; Vegetation ; Vegetation
  • 2006
  • Data base ; European part of Russia ; Geographical information system ; Moscow ; Oblast ; Plant cover ; Thematic map ; Vegetation
  • 2006
  • Cold area ; Digital elevation model ; Finland ; Geographical information system ; Lapland ; Patterned ground ; Periglacial features ; Plant canopy ; Remote sensing ; Slope gradient ; Topography
  • is more common at lower altitudes where the ground moisture and vegetation abundance is relatively high, whereas sorted patterned ground is dominant at higher altitudes with relatively high slope angle and sparse vegetation cover. This paper confirms
  • 2006
  • Deforestation ; Forest ; Forest policy ; Image analysis ; Indonesia ; Kalimantan ; Modelling ; Plant cover ; Remote sensing ; Simulation ; Tropical rain forest ; Vegetation dynamics
  • 2006
  • Land use change and land cover assessment in grazing reserves in Northwest Nigeria : a geographical analysis based on remote sensing and geographic information
  • The present thesis thrusts the case study of the Zamfara and Runka grazing reserves in northwestern Nigeria into the debate on cropland expansion and land cover change in semi-arid West Africa. It demonstrates the efficient use of geographic
  • information, GIS, and remote sensing in a context of poor geo-information and presents a timely analysis of land use and land cover change in this key resource area. - (IfL)
  • 2006
  • Origin and palaeoclimatic significance of the Pleistocene slope covers in the Cracow Upland, southern Poland
  • Periglacial slope covers in the southern part of the Cracow Upland can be grouped in 5 genetic categories : slope loess, washed loess, weathered debris, scree deposits, low-density flow deposits, and solifluctites or high-density flow deposits
  • 2006
  • Land cover change along the Qinghai-Tibet Highway and Railway from 1981 to 2001
  • Based on the NOAA AVHRR-NDVI monthly data from 1981 to 2001, the spatial distribution and dynamic change of land cover along the Qinghai-Tibet Highway and Railway were studied. Meanwhile the AA. have analyzed the driving factors of the change
  • 2006
  • Assessing the effect of environmental and anthropogenic factors on land-cover diversity in Mediterranean mountain environment
  • This study assesses the factors that influence land-cover diversity, including the specific contributions of environmental and anthropogenic forces in determining landscape diversity (spatial variability in climate, lithological variations and human
  • 2006
  • and subdominant canopy strata. This requires a large, high quality dataset covering a broad geographical area. Such material is provided by the ninth Finnish National Forest Inventory (NF19) covering southern and central Finland.
  • 2006
  • Thick moss layers and high cover of grasses : potential threats to herb diversity in hay meadows in Norway
  • 2006