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Portail d'information géographique

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Source apportionment of lake bed sediments to watersheds in an Upper Mississippi basin using a chemical mass balance method
  • The aim of this study was to develop a method of assessing the sources and depositional record of historic sediments in a lake basin with a large catchment, and reconstruct how sediment provenance changed over time. The AA. first used known mixtures
  • of source samples to test the method, then applied the technique to a field sample from a depositional basin. The site selected for sampling encompassed 3 large, contiguous catchments in the USA (headwater-Mississippi, Minnesota, and St. Croix), that deliver
  • 2000
Germany ten years after reunification
  • The unification of the two German states caused radical change in economic and social life of the eastern parts, but had also strong consequences in many spatial fields of the whole country. 18 essays give thematic surveys of aspects of the socio
  • -economic processes and transition since 1990. Thematic topics are : Population and settlement, Economy and transportation, Environment and landscape and two regional case studies about Berlin and the German-Polish frontier. - (HPB)
  • 2000
Spatial and temporal variation of soil moisture near the interface of high/low stands
  • Based on the experiments of soil moisture conducted near the interface of alfafa/winter wheat stands from May to June in 1996, this study will focus on spatial variability of soil moisture near the interface on the small scale. The scale
  • of the interface, being 60 m, is especially chosen in order to make the results meaningful in agriculture and soil water resources management in China. As the size of the plots as such is typical in China to separate different cultivation fields as geographical
  • 2000
The geomorphic significance of rock glaciers : estimates of rock glacier debris volumes and headwall recession rates in West Greenland
  • To obtain knowledge on rockwall retreat rates at sites with rock glaciers, an inventory of about 400 individual rock glacier sites in West Greenland was carried out by means of field studies, and using aerial photographs and topographic maps
  • 2000
Structural controls on the orientation of erosion gullies in mid-western New South Wales, Australia
  • The role of geology in determining the drainage network of gullying has been evaluated by quantitative methods of analysis. At gully erosion sites in New South Wales, field evidence suggests that soil cracks are sites of preferential flow
  • and erosion at both the surface and subsurface. Soil fabric and rock structure and weathering studies were undertaken to establish the inheritance of soil cracks from the underlying parent material. Correlations exist between gully orientation and joints
  • 2000
Analyse géographique comparative de l'état de la végétation dans les régions d'extraction pétrolière
  • Asian part of Russia ; Comparative study ; Forest ; Geological field ; Human impact ; Impact ; Oil ; Oil exploration ; Steppe ; Taiga ; Vegetation ; West Siberia
  • 2000
Sectoral fallow systems and the management of soil fertility : the rationality of indigenous knowledge in the High Andes of Peru
  • Sectoral fallow systems are commonly used in the Bolivian High Andes. Fields in the study erae (Japo, Department of Cochabamba) are cultivated for 3 years with potatoes as the first crop and then lie fallow for 9 years. A participatory research
  • 2000
Presidential plenary session : studying, teaching, and serving your locality in a globalizing world
  • Presidential plenary session : studying, teaching, and serving your locality in a globalizing world
  • A call for geographers to become more involved in the study of their localities and home regions. She also insists that such studies do not lose sight of the global horizon and the role it plays in local change and evolution. - (SLD)
  • 2000
Gender differentials in resources ownership and crop productivity of smallholder farmers in Africa : a case study.
  • Gender differentials in resources ownership and crop productivity of smallholder farmers in Africa : a case study.
  • The case study uses farm management survey data on smallholder farmers from eight villages in Botswana. The findings show that there are no significant differences in crop productivity between male farmers and their female counterparts, neither
  • 2000
Experimental study of wind directional variability in the vicinity of a model valley
  • Experimental study of wind directional variability in the vicinity of a model valley
  • This paper reports the results of a preliminary study examining the effects of valley presence on airflow direction and focuses on valleys situated in areas of low relief. Wind tunnel experiments are used to visualise near-surface airflow over
  • a series of models representing valleys oriented at different angles to mean airflow. This study has significance to the modelling of pollution dispersal and also aeolian sediment and nutrient dynamics in desert regions.
  • 2000
The GCTE Soil Erosion Network and model evaluation studies
  • The GCTE Soil Erosion Network and model evaluation studies
  • 2000
Practising photography : an archive, a study, some photographs and a researcher
  • Practising photography : an archive, a study, some photographs and a researcher
  • Cultural studies ; Historical geography ; Nineteenth Century ; Perception ; Photography ; Research ; United Kingdom
  • 2000
Holocene development of the River Lippe valley, Germany : a case study of anthropogenic influence
  • Holocene development of the River Lippe valley, Germany : a case study of anthropogenic influence
  • is a special case of anthropogenic influence that might be an interesting addition to previous studies of human impacts on palaeohydrology, channel change and valley floor development (Gregory, 1995; Brown, 1996; Kalicki,1996).
  • 2000
Methodological issues in cross-border analyses of European small-area data : a case study
  • Methodological issues in cross-border analyses of European small-area data : a case study
  • Aggregation analysis ; Comparative study ; Data ; Economic indicators ; Ireland ; Northern Ireland ; Population census ; Social indicators ; Source of documentation
  • 2000
Medicinal plant cultivation and sustainable development : a case study in the Buffer Zone of the Nanda Devi Biosphere Reserve, Western Himalaya, India
  • Medicinal plant cultivation and sustainable development : a case study in the Buffer Zone of the Nanda Devi Biosphere Reserve, Western Himalaya, India
  • medicinal plants. Goal of this study was to understand the socioeconomics of medicinal plant cultivation and evaluate the prospects of this practice in promoting sustainable development among the Bhotiya. - (SLD)
  • 2000
Community worldview and rural systems : a study of five communities in Iowa
  • Community worldview and rural systems : a study of five communities in Iowa
  • Agriculture ; Cultural studies ; Iowa ; Midwest ; Religion ; Research technique ; Rural community ; Rural geography ; Rural society ; Rural system ; United States of America ; Value system ; View of the world
  • 2000
Comparative study of hub airports in Europe : ticket prices, travel time and rescheduling costs
  • Comparative study of hub airports in Europe : ticket prices, travel time and rescheduling costs
  • Airline network ; Airport ; Centrality ; Comparative study ; Economic cost ; Europe ; Transport network
  • 2000
The effect of land use change on soils and vegetation over various lithological formations on Lesvos (Greece)
  • The effect of land use change, from arable to abandoned pasture, on soil properties and vegetation establishment was studied in hilly areas of the island of Lesvos. The main purpose of this study was to establish key indicators or land parameters
  • that can be used for defining environmentally sensitive areas to desertification. This study showed that soil depth is the most important parameter which has to be considered in planning land use change from arable to unmanaged pasture under the soil
  • and climatic conditions of the study area.
  • 2000
Study on sustainable development of urban fringe in China
  • Study on sustainable development of urban fringe in China
  • 2000
A study on the development trends of tourist marketing policies in the 21st century
  • A study on the development trends of tourist marketing policies in the 21st century
  • 2000