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Portail d'information géographique

Résultats de la recherche (117 résultats)

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Par Collection Par Auteur Par Date Par Sujet Par Titre
  • China ; Ecology ; Forest ; Gully erosion ; Loess ; Plateau ; Precipitation ; Slope gradient ; Soil erosion ; Soil properties
  • The Ziwuling forest area provides research base for tracing back eco-environmental change related to natural erosion and artificially accelerated erosion. Using methods of typical region investigations, in-situ experimental study and chemical
  • analysis of samples, impact of vegetation destruction and rehabilitation on soil erosion, characteristics of natural erosion under conditions of natural ecological balance and artificially accelerated erosion resulting from vegetation destruction in forest
  • 1997
  • How wide is a road? The association of roads and mass-wasting in a forested montane environment
  • Data base ; Forest ; Geographical information system ; Human impact ; Hurricane ; Landslide ; Mountain ; Probability ; Puerto Rico ; Road ; Road network ; Statistics ; Tropical zone ; West Indies
  • 1997
  • A spreadsheet-based technique (Lotus 1-2-3) for separating tropical forest storm hydrographs using Hewlett and Hibbert's slope
  • Computing ; Hydrology ; Methodology ; Rainstorm ; Rill wash ; Runoff ; Tropical rain forest ; Watershed
  • 1997
  • Alicante ; Altitude ; Forest fire ; Mediterranean area ; Mountain ; Precipitation ; Soil ; Soil properties ; Soil water ; Spain ; Water retention
  • The objective of this work was to evaluate whether different soil conditions at burnt sites result from fire or from different climatic conditions (average annual precipitation). For this purpose, an altitudinal transect affected by forest fires
  • 1997
  • of montane forest patches. Failed succession due to recalcitrant pasture grasses is discussed. Suggested that montane forest clearing should include treefall survivors, such as guava and pagche (Nectandra membranacea), to stimulate seed disperal
  • 1997
  • A short history of a flat place : three centuries of geomorphic change in the Croatan National Forest
  • Coastal environment ; Coastal plain ; Erosion rate ; Forest ; Holocene ; Human impact ; Land use ; Natural hazards ; North Carolina ; Quaternary ; Sea level ; Sediment budget ; Soil erosion ; United States of America
  • Despite flat terrain, extensive forests, and little urbanization, there has been extensive landscape change in the Croatan area of North Carolina's lower coastal plain in the past 300 years. Culturally-accelerated erosion, sedimentation
  • 1997
  • Environmental conservation ; Forest ; Forest fire ; Geographical information system ; Italy ; Preventive measure
  • 1997
  • Forest ; Forest fire ; Ireland ; Land use ; Oak ; Palynology ; Pedogenesis ; Pine ; Podsol ; Quaternary ; Soil ; Soil properties ; Vegetation dynamics
  • 1997
  • Asian part of Russia ; Economic policy ; Forest policy ; Forest resources ; Forestry ; Rational use ; Siberia
  • 1997
  • C 14 dating ; Forest ; Human impact ; Palaeo-environment ; Palynology ; Pollen analysis ; Quaternary ; Stratigraphy ; Swamp ; Uganda ; Vegetation dynamics
  • deposited before and soon after the last glacial maximum represents vegetation very different from the modern vegetation of the Mubwindi Swamp catchment. The pollen data provide evidence for a late glacial montane forest refuge near Mubwindi Swamp. During
  • 1997
  • Canada ; Forest ; Forest resources ; Forestry ; Logging ; Management ; Stand treatment ; Sustainable development
  • 1997
  • Africa ; Australia ; Biodiversity ; Biogeography ; Brazil ; Classification ; Ecosystem ; Fire ; Forest-savanna transition ; India ; Ivory Coast ; Northern Territory ; Primary production ; Remote sensing ; Savanna ; Tropical zone ; Vegetation
  • Research on classification and biodiversity forms the starting point for this report, followed by work on primary production, the impact and significance of fire, research on forest-savanna boundaries, the influence of nurse and shade plants
  • 1997
  • Biogeography ; Carbon ; Climatic variation ; Ecosystem ; Ecotone ; Forest ; Montana ; Mountain ; National park ; Tree line ; United States of America
  • their hypothesis, they simulate tree carbon balances through the latter half of the 20th century along elevational transects using a physiologically mechanistic forest process model (ATE-BGC) that has been designed for use at alpine treeline locations.
  • 1997
  • Acid rain ; Coastal environment ; Ecosystem ; Environment ; Forest ; Humid environment ; Hydrochemistry ; Lake ; Regional policy ; Surface water ; Sweden ; Water quality
  • 1997
  • [b1] Dep. Forest Ecology, Swedish Univ. Agriculture Sciences, Umeå, Suede
  • Classification ; Forest ; Ivory Coast ; Phytogeography ; Remote sensing ; Tropical zone ; Vegetation
  • 1997
  • Afforestation ; Agricultural practice ; Andes ; Ecuador ; Environmental conservation ; Erosion control ; Forest ; Mountain ; Rural planning ; Soil conservation
  • 1997
  • Determinación de la tasa de erosión hídrica en función del manejo forestal : la cuenca del río Santa Lucía (Gipuzkoa)
  • Basque Country ; Forest ; Geographical information system ; Guipúzcoa ; Mountain ; Slope gradient ; Soil erosion ; Spain ; Stand treatment ; Water erosion ; Watershed
  • 1997
  • Agricultural cooperation ; Agricultural product ; Cameroon ; Ecuador ; Export ; Farm income ; Forest ; Forest resources ; Fruit ; Tropical rain forest
  • 1997
  • Agriculture ; Development ; Forest ; Indonesia ; Land use ; Man-environment relations ; Population distribution ; Population redistribution ; Regional development ; Resource management ; Slash and burn agriculture
  • 1997
  • Definition ; Forest ; Resource management ; Theory
  • 1997