Applied ecology ; Arid area ; Bioclimatology ; China ; Desertification ; Indicator ; Remote sensing ; Soil degradation ; Vegetation index
Desertification indicator systems contain type, degree, risk and reversion effect, of which desertification degree is most important. Based on the analyses of the issues of these existing indicator systems, this paper emphatically discusses
the relations between the regaining and establishment of ecological datum level of land degradation and the indicator system, and puts forward the basic principles for the construction of the indicator system.
Agro-ecology ; Biodiversity ; Diversity theory ; Index ; Landscape ; Planning ; agro-ecology ; biodiversity ; disturbance ; diversity indices ; landscape planning
Biodiversidad ; Paisaje ; Planificación ; Índice
Diversity indices are often considered by landscape planners as easy to calculate and informative for planning procedures. The main objective of many landscape planners using such indices is 'to obtain the magic number'. The misinterpretation
of the real significance of diversity values that this indicates is alarming because it could induce conceptual traps and the promotion of poor strategies for ecosystem and landscape management with serious ecological, economic, and political implications
. This paper highlights the need to plan reliable diversity analysis based on a good understanding of the relevant theory. The quantitative values of indices obtained should be used as the basis for planning only after a critical and qualitative interpretation
of such indices by professional ecologists and considering local features, history, constraints and the human disturbances affecting the ecological units studied. The aim of this short communication is to promote a critical use of biodiversity indices while
Tentative de classification des principaux indices bioclimatiques. Discussion de leur intérêt relatif pour l'analyse de l'environnement thermique de l'homme en ambiance froide et en ambiance chaude. - (JPB)
Vector analysis as a means of indicating rainfall seasonality in the Transvaal
Afrique du Sud ; Analyse vectorielle ; Géographie de l'Afrique ; Indice de saisonnalité ; Précipitation ; Transvaal
This paper describes and evaluates the use of vector analysis for indicating rainfall seasonality. Three advantages pertaining to the use of the technique for regionalization are pinpointed.-(AJC)
Aménagement hydraulique ; Analyse de système ; Bassin-versant ; Géographie humaine ; Indice de résilience ; Projet ; Ressource en eau ; Résilience ; Simulation ; Système
Calcul de plusieurs indices de résilience pour des configurations différentes de réservoirs, correspondant à des plans d'aménagement d'un bassin-versant, par simulation.
Les indices d'aplatissement et d'émoussé de Cailleux sont transformés en indices logarithmiques ce qui permet de corriger l'asymétrie des histogrammes.
Comparaison entre l'indice de dissimilitude (dissimilarity index) et l'indice de différenciation résidentielle (résidential differentiation index) servant à mesurer la ségrégation spatiale urbaine. (Vnm).
Tourism index, indicating settlements’ market positions, is based on aggregating the demand and supply databases of tourism market. A novelty of the index’s methodology is that it can indicate tourist performance in different territorial units
. The purpose of study is to explain the theoretical background of the indicator and its application to different territorial levels. The index also allows monitoring further environmental-tourism relations, geographical and spatial development, and regional
In areas with under 50 cm snow cover in winter, the permafrost zones can be defined by freezing indices and thawing indices. The relationship works for Norway, Spitsbergen, Canada and Mongolia, and since these include a very wide range of thermal
Zonagem provisoria de Moçambique pelo indice climatico de potencialidade agricola de Turc Division régionale provisoire du Mozambique selon l'indice de capacité agricole de Turc
Agriculture ; Capacité agricole ; Climat ; Géographie de l'Afrique ; Indice de Turc ; Irrigation ; Mozambique ; Région ; Régionalisation
Valeurs annuelles de l'indice pour 50localités et influence de l'irrigation sur l'indice. (SD).
The derivation of vegetation indices from AVHRR data
AVHRR ; Etats-Unis ; Great Plains ; Généralités sur la géographie ; Indice de végétation ; NOAA ; Télédétection ; Végétation
La véracité d'un indice de végétation normalisé, composé sur 1 semaine est évaluée au moyen d'algorithmes de filtres des nuages. Dans les Grandes Plaines les nuages sont trop souvent abondants, ce qui biaise l'indice dont les variations sont
Regional, spatial and environmental indicators for an assessment of regional development, structure and potentials
Indicator ; Regional development ; Regional planning ; Spatial structure
The article brings theoretical, methodological and practical aspects of adopting regional, spatial and environmental data, indicators and criteria for the assessment of regional structure, potentials and development within the context of regional
and spatial planning. The proposal of the system of indicators is presented on the basis of the CONSPACE project. - (IKR)