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PORTAIL D'INFORMATION GÉOGRAPHIQUE

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Par Collection Par Auteur Par Date Par Sujet Par Titre
  • Central African forest cover revisited : a multisatellite analysis
  • Afrique ; Afrique centrale ; Carte de la végétation ; Centrafricaine, république ; Congo ; Couvert végétal ; Forêt ; Phytogéographie ; Plante cultivée ; Savane ; Télédétection
  • Africa ; Central Africa ; Central African Republic ; Congo ; Cultivated plants ; Forest ; Phytogeography ; Plant canopy ; Remote sensing ; Savanna ; Vegetation map
  • 2000
  • Land cover changes between 1958 and 1986 in Kalu District, Southern Wello, Ethiopia
  • Aerial photography ; Environmental degradation ; Ethiopia ; Geographical information system ; Land use ; Plant canopy ; Vegetation dynamics
  • %) because of clearing of vegetation and remaining open area increased the most (333%). Area under cultivation remained about the same. Authors call for rehabilitation off degraded hillslopes with little or no plant cover. - (SLD)
  • Two aerial photographs from 1958 and 1986 are digitized in TIFF format and imported into thinkspace's Map Factory. Nine land cover categories were distinguished and their areas were compared for the two dates. Shrubland decreased the most (-51
  • 2000
  • Hydro-ecological analysis of a sacred lake watershed system in relation to land-use / cover change from Sikkim Himalaya
  • Agricultural land use ; Agroforestry ; Ecosystem ; Himalaya ; Hydrology ; India ; Lake ; Nutrient ; Peat bog ; Plant canopy ; Sikkim ; Watershed
  • The land-use / cover changes from forest to other uses have been widespread in the last few decades in the Himalayan region. Therefore, this study was designed to understand the different ecological processes in the sacred Khecheopalri Lake
  • watershed in relation to land-use / cover change. The study investigates : precipitation, discharge and sediment movement; overland flow and soil loss; precipitation partitioning pathways in forest and agroforestery systems and the factors contributing
  • 2000
  • Desert ; Ecosystem ; European part of Russia ; Kabardin-Balkaria ; Pastoral ; Pastureland ; Plant cover ; Sand ; Steppe ; Vegetation degradation
  • Les Sables de Tersk sont parmi les plus anciennes régions de pâturages. Leurs écosystèmes sont depuis longtemps influencés par l'activité pastorale qui induit à la fois une dégradation des plantes et du couvert végétal et une déflation de sable
  • 2000
  • Evaporation ; Heat exchange ; Hydrology ; Mathematical model ; Model ; Plant cover ; Precipitation ; Snow cover ; Water exchange ; Watershed
  • 2000
  • A teacher friendly guide to the Massachusetts cranberry industry. Article covers the nature of the cranberry plant, the bogs and marshes in which they grow, the wetland environment necessary for the health of the bogs, and development pressures
  • 2000
  • Arid area ; Environmental conservation ; Erosion control ; Plant colonization ; Plant cover ; Semi-arid area ; Vegetation
  • 2000
  • Alluvial cone ; Geomorphometry ; Grain size distribution ; Land use ; Mudflow ; Plant canopy ; Pyrénées ; Sedimentology ; Slope dynamics ; Spain ; Watershed
  • , the proximal area is dominated by debris flows, which pass downslope into transitional and fluvial deposits. The AA. explain the most recent activity in alluvial fans in relation to land-use and plant cover changes affecting their catchments during the last few
  • 2000
  • Aisne ; Erosion budget ; Field experiment ; France ; Picardie ; Plant cover ; Quantitative analysis ; Rill wash ; Soil erosion ; Temperate zone ; Water erosion ; Watershed ; Years 1980-89 ; Years 1990-99
  • 2000
  • along field boundaries and tractor roads, and overflowing of silted-up ditches. Aspects of agricultural land use examined are tillage and traffic operations, their interaction with intra-annual variations in plant cover and rainfall, and the role
  • 2000
  • Canadian geomorphology 2000
  • Canada ; Climatic variation ; Colluvium ; Dendrology ; Forest ; Gaspé ; Holocene ; Palaeo-environment ; Plant colonization ; Postglacial ; Quaternary ; Quebec ; Slide rocks ; Slope ; Slope dynamics
  • beneath an ice cover between 13,500 and 10,000 years BP, the scree slopes have to be seen as an integral part of a regional geosystem. The stratigraphic and chronologic data for individual slopes do permit the recognition and discussion of successive
  • 2000
  • Aragón ; Comparative study ; Cultivated land ; Ebro ; Erodibility ; Fallow land ; Plant cover ; Rainfall simulation ; Roughness ; Semi-arid area ; Soil erosion ; Spain ; Water erosion ; Watershed ; Wind erosion
  • 2000
  • 1998's floods in the Changjiang River and the land use/land cover change in the upper and middle-lower reaches in the past 50 years
  • and analyze the causes for the frequent flood disasters based on the land use and land cover change in the upper and middle-lower reaches of the Changjiang River.
  • 2000
  • Variability and change in terrestrial snow cover : data acquisition and links to the atmosphere
  • Atmospheric circulation ; Bibliography ; Model ; NOAA ; Radar ; Remote sensing ; Satellite imagery ; Snow ; Snow cover
  • 2000
  • Debris-covered glaciers and rock glaciers in the Nanga Parbat Himalaya, Pakistan
  • The origin and mobilization of the extensive debris cover associated with the glaciers of the Nanga Parbat Himalaya is complex. The AA. propose a mechanism by which glaciers can form rock glaciers through inefficiency of sediment transfer from
  • 2000
  • Demonstration of past sediment cover on present-day karst landscapes
  • Boundaries of former covered and uncovered karsts can be determined through the analysis of the features developed along rock boundaries since the latter survive the denudation of the sediment cover. Not only the conditions of coverage in a karst
  • 2000
  • Relation of sediment transport capacity to stone cover and size in rain-impacted interrill flow
  • This study examines how the sediment transport capacity of interrill overland flow varies with stone cover and stone size at 2 flow intensities. 6 series of flume experiments were conducted on 2 slopes with stones of 3 sizes serving as roughness
  • elements. Water discharge, rainfall intensity and sediment size are held constant, and stone size, stone cover and slope are varied. Slope is varied as a means of altering flow intensity without changing discharge.
  • 2000
  • Heavy metal sources in bedrock and cover-beds of the Steigerwald Mountains
  • deposits have remained protected by overlying cover-beds nearby. At 3 sites, the AA. compare heavy metal concentrations within such deposits across a boundary of varying protection. This approach allows for quantifying post-depositional alteration
  • 2000
  • Land cover change and its environmental significance in the Herbert River catchment, North-east Queensland
  • , which utilised remote sensing and Geographic Information Systems (GIS) to assess both spatial and temporal changes in land cover since European settlement in the mid-nineteenth century. The results identify a number of significant issues that are central
  • 2000
  • Land-cover change trajectories in southern Cameroon
  • The objective of this study is to better understand the complexity of deforestation processes in southern Cameroon by testing a multivariate, spatial model of land-cover change trajectories associated with deforestation. The use of time series
  • 2000