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Par Collection Par Auteur- BRYAN, R.B., (Editeur scientifique) (12)
- KUHN, N.J. (10)
- QUINTON, J.N. (10)
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- ZIELHOFER, C., (Editeur scientifique) (9)
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- HUDSON, P.F., (Editeur scientifique) (6)
- CORNET, Antoine, (Editeur scientifique) (5)
- Comité scientifique français de la désertification (CFSD), France, (Organisateur de congrès) (5)
- GOVERS, G. (5)
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- Well drained soils with a degraded Bt horizon in loess deposits in Belgium| relationship with paleoperiglacial processes
- Belgique ; Fragipan ; Géographie physique ; Horizon Bt dégradé ; Héritage périglaciaire ; Loess ; Paléopériglaciaire ; Pédogenèse ; Périglaciaire ; Sol ; Zone tempérée
- The presence of a compact fragipan horizon help to explain the association of the degradation of the soil and the permeability of the substratum. This is possible on basis of the hypothesis which links the fragipan development to ice segregation
- in permafrost aggrading in an environment with relatively high water supply from the subsoil. The degree of degradation, and its distribution in the landscape, can be explained in a much more satisfactory way by these processes associated with a periglacial
- Degradation of permafrost in the Xing'anling Mountains, Northeastern China
- China ; Climatic warming ; Cold area ; Deforestation ; Degradation ; Mountain ; North-Eastern China ; Periglacial features ; Permafrost
- This paper reviews the evidence and reasons for permafrost degradation, and offers a preliminary assessment of the present status and the future trends of permafrost conditions within the Xing'anling Mountains. Climate warming and deforestation have
- led to permafrost degradation as shown by deepening of the active layer, thinning permafrost, rising ground temperatures, expanding taliks and the disappearance of permafrost patches. The present position of the southern limit of permafrost
- Use of soil horizons for assessing soil degradation and reconstructing chronology of degradation processes : the case of Mwisanga catchment, Kondoa, central Tanzania
- Catena ; Gully erosion ; Land use ; Photointerpretation ; Soil ; Soil conservation ; Soil degradation ; Soil erosion ; Soil properties ; Tanzania ; Tropical zone ; Typology
- This paper analyses the use of soil horizons for mapping soil degradation intensity and reconstructing chronology of degradation processes. Through Pedogenetic Baseline Approach, the catchment was classified into 2 categories : the erosional
- Environmental change in the Kalahari : integrated land degradation studies for nonequilibrium dryland environments
- Arid area ; Botswana ; Ecosystem ; Hydrochemistry ; Kalahari ; Model ; Nutrient ; Over-grazing ; Pastoral ; Scrub ; Soil degradation ; Soil moisture ; Soil water
- Patterns of ecological change, notably increased bush dominance, have been linked to increased cattle-grazing intensity, but it remains contentious whether these changes represent land degradation. Given the inherent ecological variability
- of drylands, the AA. argue that degradation assessments should be based, not on ecological observations alone, but on the study of long-term changes in pastoral production figures and on changes in the ecologically determining factors of soil water and soil
- nutrient avaibility. They present a model of ecosystem dynamics that does not display bush encroachment as a definite form of land degradation.
- Land degradation and its control strategies in China
- Afforestation ; China ; Cultivated land ; Desertification ; Environment ; Environmental management ; Nutrient ; Pollution ; Salinisation ; Soil degradation ; Soil erosion ; Statistics ; Water erosion ; Water resources ; Wind erosion
- Following the discussion of the causes and disasters of land degradation, this paper presents the achievements gained in prevention and control of land degradation since 1949. The several control strategic measures in combating land degradation
- Crossing the thresholds : human ecology and historical patterns of landscape degradation
- Agricultural land use ; Common agricultural policy ; Environmental degradation ; Historical geography ; Human ecology ; Human impact ; Iceland ; Modelling ; Over-grazing ; Soil erosion ; Tephrochronology
- The AA. assess the extent to which common land domestic grazing pressures were the primary external force causing soil erosion and land degradation during the period of occupation from ca. 874 AD in Southern Iceland. They first provide field
- observation of soil erosion, temporally defined by tephrochronology, to highlight the extent of land degradation during this period. The tragedy of the commons explanation of degradation is then assessed by evaluating historic documentary sources
- A Comparative study of land degradation in Baringo and Machakos Districts, Kenya in African Resources. Volume 2. Management.
- Land degradation in two sub-humid to semi-arid districts of Kenya is related to the interrelationship of the physical and socio-political environment.
- Pollen and spore stratigraphy of a mollic hapludalf (degraded chernozem) in Northeastern Kansas
- Analyse pollinique ; Chernozem dégradé ; Etats-Unis ; Formation superficielle ; Géographie physique ; Hapludalf ; Kansas ; Loess ; Palynologie ; Pédogenèse ; Pédoturbation ; Sol ; Stratigraphie sporo-pollinique
- Développement social des quartiers dégradés. Sites retenus dans le cadre de la régionalisation de la procédure (Laon, Beauvais, Méru)
- Aisne ; Beauvais ; France ; Grand ensemble ; Géographie de l'Europe ; Laon ; Morphologie urbaine ; Méru ; Oise ; Picardie ; Quartier dégradé ; Structure sociale ; Urbanisme
- Policies to reduce tropical deforestation and degradation : a computable general equilibrium analysis for Cameroon
- Cameroon ; Deforestation ; Forest ; Forest policy ; Numerical model ; Tropical rain forest ; Vegetation degradation ; Wood
- This paper addressed specific questions within the much broader discussion on policies to reduce tropical deforestation and degradation in developing countries. The short-to medium-run consequences of resource policies and trade liberalization
- Interrelationships between land abandonment and land degradation: a case from the Ecuadorian Andes
- Andes ; Ecuador ; Experimentation ; Fallow land ; Land use ; Mountain ; Pastureland ; Rainfall simulation ; Rill wash ; Soil degradation ; Soil erosion ; Tropical zone
- Further evidence provided of land degradation resulting from land abandonment in the Ecuadorian Andes where runoff and erosion rates are significantly higher than those of lands under cultivation. - (DWG)
- Defining degradation : the impacts of swidden on forests in Northern Thailand
- Environment ; Environmental degradation ; Ethnic community ; Forest ; Land clearing ; Shifting cultivation ; Thailand ; Vegetation dynamics
- A reevaluation of the usual view that shifting cultivation leads to forest degradation, soil erosion, water shortages, and other undesirable changes. Author examines the swidden farming near three upland villages in northern Thailand. swiddens
- An assessment of land degradation in the Save catchment of Zimbabwe
- Environmental degradation ; Geographical information system ; Image analysis ; Land use ; Vegetation dynamics ; Watershed ; Zimbabwe
- Identification d'espaces susceptibles d'être dégradés. La télédétection et les techniques de SIG sont appliquées au district de Buhera. Données : images Landsat de 1992 et 2002, zonage agro-écologique, couverture végétale et densité de population
- Assessing the degradation of saline wetlands in an arid agricultural region in Spain
- Agropedology ; Aragón ; Arid area ; Aridity ; Environmental degradation ; Humid environment ; Inventory ; Playa ; Remote sensing ; Salinity ; Spain
- with the available disperse data about these wetlands'toponomy and location. The degraded landscape appearance of the surviving wetlands, mainly affected by agricultural intensification, dumping and farming, has been quantitatively assessed. The integration of remote
- The relevance of humus forms for land degradation in Mediterranean mountainous areas
- Catena ; Forest soil ; Humus ; Infiltration ; Lithology ; Mediterranean climate ; Mountain ; Soil ; Soil degradation ; Soil erosion ; Soil properties ; Spain
- are relevant for the susceptibility of these soils to erosion and degradation.
- Degradation of talus-derived rock glaciers in the Upper Engadin, Swiss Alps
- This study aims at evaluating changes in the morphology and structure of rock glaciers with permafrost degradation. For this purpose, morphology, structure and thermal conditions are compared between active, inactive and relict rock glaciers
- permafrost degradation in rock glaciers are discussed.
- Soil degradation in Sardinia - Historical causes and current processes due to anthropogenic pressure.
- Degradation - Desertifikation
- Agriculture ; Climate ; Italy ; Land use ; Mine ; Salinisation ; Sardegna ; Soil degradation ; Urbanization
- Drought ; Ecological imbalance ; Ecosystem ; Environmental degradation ; Pastureland ; Spain ; Vegetation degradation
- PROBLEMY DEGRADACJI I OCHRONY POWIERZCHNI ZLEMI W RYBNICKIM OKREGU WEGLOWYM .PROBLEMS OF EROSIVE DEGRADATION AND PROTECTION OF LAND SURFACE IN THE RYBNIK COAL BASIN
- Perspectives on the assumed causes of land degradation in the rangelands of Sub-Saharan Africa
- Adaptation ; Africa ; Arid area ; Decision making process ; Environmental degradation ; Erosion control ; Erosion rate ; Human impact ; Local policy ; Man-environment relations ; Over-grazing ; Slope gradient ; Soil erosion ; Soil properties
- This review shows that the human-induced causes of soil erosion and land degradation in Sub-Saharan Africa are not fully understood. The popular views of human-induced soil erosion and land degradation not only fail to take into consideration
- the fact that land degradation is primarily a physical process, but also they do injustice to adaptive ecosystem management by the local inhabitants. The review specifically questions the stereotypes of overpopulation, overgrazing, deforestation
- , overstocking, and general rangeland degradation due to human resource use in Sub-Saharan Africa. Empirical evidence suggests that biophysical factors including soil properties, climatic characteristics, topography, and vegetation can sometimes interact among
- themselves to yield high soil erosion and degradation rates independent of anthropogenic impacts.