Origin and development of glacio-karst closed depressions in the Picos de Europa, Spain
Glacio-karst closed depressions are the major large scale karst landforms of the Eastern Massif of the Picos de Europa. During valley glaciation the major depressions functioned as cirques, with smaller depressions also developing in the floor
of glacial troughs and in glacier margin locations. The major glacio-karst depressions developed at the locations of pre-glacial features where topo-climatic factors favoured snow accumulation.
RAVINS ET DEPRESSIONS FERMEES DU CONTINENTAL TERMINAL IVOIRIEN
ABIDJAN, REGION ; BASSIN SEDIMENTAIRE ; CONTINENTAL TERMINAL ; COTE D'IVOIRE ; DEPRESSION FERMEE ; GEOMORPHOLOGIE ; Géographie de l'Afrique ; ZONE INTERTROPICALE
LE BASSIN SEDIMENTAIRE SECONDAIRE-TERTIAIRE DE COTE D'IVOIRE EST TRAVERSE D'EST EN OUEST PAR UNE FAILLE IMPORTANTE, L'ACCIDENT DES LAGUNES. AU NORD DE CET ACCIDENT LES SEDIMENTS DU CONTINENTAL TERMINAL ARGILO-SABLEUX S'OUVRENT DESDEPRESSIONS
FERMEES, DONTL'ORIGINE POURRAIT SE TROUVER DANS UN LESSIVAGE SOUTERRAIN. LA PRESENTE ETUDE EST LA DESCRIPTION TOPOGRAPHIQUE D'UNE DE CES DEPRESSIONS. (FN).
A new approach for dealing with depressions in digital elevation models when calculating flow accumulation values
Accumulation fluviatile ; Algorithme ; Bassin-versant ; Modèle numérique de terrain ; Méthodologie ; Réseau de drainage ; Topographie
Acumulación fluviátil ; Algoritmo ; Cuenca hidrográfica ; Metodología ; Modelo numérico de terreno ; Red de drenaje ; Topografía
In this paper, some of the main flow accumulation algorithms and some existing techniques for dealing with closed depressions in DEMs are reviewed. A new algorithm is presented which assumes that such depressions are real features in the landscape
, and which allows them to ‘fill’ and then ‘overflow’ into downstream areas within the DEM. Examples with a synthetic and two real DEMs suggest that, at least in these cases, the assumption that depressions are real is justified. These results also suggest
that determining the size distribution for depressions within a DEM could form the basis for identifying whether artifact depressions are a problem in individual DEMs.
Quantitative description of depression storage using a digital surface model. II. Characteristics of surface depressions
Bassin-versant ; Distribution de Weibull ; Dépression ; Géographie physique ; Géomorphométrie ; Modèle digital ; Propriété géométrique ; Rétention de l'eau ; Simulation ; Statistique spatiale ; Topographie
A partir des caractéristiques mesurées d'après la méthode présentée dans l'article ci-dessus, étude de la distribution spatiale des dépressions. Examen de la variabilité de rétention potentielle des dépressions en fonction des diverses
caractéristiques géométriques. Analyse fréquentielle des propriétés géométriques des dépressions et ajustement des distributions observées à la distribution de Weibull.
The impact of depression removal on catchment geomorphology, soil erosion and landscape evolution
Australie ; Bassin-versant ; Erosion des sols ; Géomorphodynamique ; Modèle ; Modèle numérique de terrain ; Northern Territory ; Réseau de drainage ; Transport sédimentaire ; Vitesse d'érosion
This study examines whether a digital elevation model can be hydrologically correct (i.e. all depressions removed so that all water can run downslope) before use in a landscape evolution model and what effect depression removal has on long-term
show that there is little difference in catchment geomorphology and hydrology for the non-depression removed and depression removed data sets.
Evolution and opening of closed depressions developed in a quartz-kaolinitic sedimentary substratum at Taubaté basin (São Paulo, Brazil), and anlogy to the slope evolution
Brazil ; Chemical erosion ; Closed depression ; Dating ; Geomorphogenesis ; Groundwater ; Peat bog ; Relief ; Sedimentary ; Slope ; São Paulo ; Tectonics ; Weathering
This study attempts to differentiate the chemical role from that of surface mechanical transport in the evolution of closed depressions and associate valleys. The occurrence of dated peat (17,000-12,500 yr B.P.) in the soil in a closed depression
of the Taubaté basin, allowed reconstruction of the evolution of this depression, and estimation of the rate of sinking. Chemical erosion is the main agent for the generation of landforms in this region.
[b1] Pontificia Universidade Católica de São Paulo, São Paulo, Bresil
[b2] Orstom-UR12, Nupegel, Universidade de São Paulo, São Paulo, Bresil
Loess deposits are widespread within the piedmont and intramontane depressions of Central Asia. They cover piedmont plains, river terraces, ridge slopes and watersheds. Loess is a significant component in the piedmonts of Tien Shan, eastern Fergana
depression, the Afgan-Tajik depression, piedmonts of Kopetdag, Badchyz and Karabil Hills north of Parapamiz, in the Kashmir valley, on the Potwar Plateau and in the Peshawar Basin.
Beitrag zur Einschätzung des Zustandes der Erdkruste der Mittel-europäischen Senke. (A contribution to the assessment of the state of earth's crust of the Middle-European depression)
Croûte terrestre ; Dépression crustale ; Europe ; Europe centrale ; Géographie de l'Europe ; Géophysique ; Isostasie ; Tectonique globale
Based on investigations on the interruption of the isostatic equilibrium of the earth crust and the horizontal gradients of thicknesses and depths within the Middle-European depression different crustal states could be found out for the GDR part
of depression. These parts coincide with the opening and closing areas.
The Federal program concerning the Development of the Depressed Regions is being worked out in the Russian Federation, though for the time being there is no clear definition of a depressed regions as well criteria for obtainig this status. Any
territory seeking for the federal subsidies is ready to claim for the status of depressed region. The article contains the analysis the Japanese legislative practice in this field and evaluation of possibility to use such a machinery in modern Russia
. The main stress is put on the problem of employment reduction in depressed industries of regions and the role of all-level authorities in the solution of the problem. The importance of forecasting and preventive measures is pointed out.
This paper presents a simple understanding-oriented model based on the conditioned-walker technique. This model simulates overland-flow triggering, i.e. the development of water transfer among depressions and to the runoff boundary. By the use
of relevant measurements, the paper intends to provide further understanding about the control of overland-flow by the surface roughness due to the storage of water by depressions.
Erosion of primary volcanic depressions in the Inner Carpathian Volcanic Chain
Caldeira ; Carpates ; Cratère ; Cénozoïque ; Erosion ; Europe ; Europe centrale ; Néogène ; Pléistocène ; Réseau de drainage ; Volcanisme
This paper, summarising and evaluating regional data of recent research, focusses on the characteristics of erosion and drainage pattern observed on the youngest to oldest volcanic depressions of the Carpathians. Eroded craters, calderas, failure
-related and volcano-tectonic depressions are distinguished, and the course and geomorphic characteristics of their degradation are discussed.
Slope form, erosion, and hydrology in some belizean karst depressions
Ablation spécifique ; Belize ; Dynamique de versant ; Ecoulement ; Géographie de l'Amérique ; Hydrologie ; Karst ; Vitesse d'érosion ; Zone intertropicale
Relevé détaillé des versants dans sept dépressions karstiques du Belize : étude géomorphométrique, ablation spécifique, précipitations, écoulement de surface et hypodermique, dureté de l'eau.
Closed depressions in limestone areas: some teaching approaches for the physical geographer
Doline ; Enseignement de la géographie ; Géographie physique ; Géomorphométrie ; Hypsométrie ; Karst ; Modelé karstique superficiel ; Planimétrie ; Roche carbonatée
Idées pédagogiques de présentation des dépressions karstiques fermées et de leurs processus de formation. L'A. insiste sur les techniques morphométriques.
The origin and geomorphological significance of closed depressions in the Lubombo Mountains of Swaziland
Pseudokarst dans des rhyolites. Les croûtes ferrugineuses les dateraient d'au moins 1 million d'années. Pas de traces d'éolisation au Pléistocène. (CM).
Examining the factors associated with depression at the small area level in Ireland using spatial microsimulation techniques
Accessibilité ; Analyse régionale ; Distribution spatiale ; Irlande ; Politique de la santé ; Santé ; Services de santé ; Variation spatiale
Accesibilidad ; Análisis regional ; Distribución espacial ; Irlanda ; Política de la salud ; Salud ; Servicios de salud ; Variación espacial
The World Health Organisation (WHO) predicts that, world-wide, depression will be the second largest source of burden of disease by 2020. It is currently estimated that approximately 300,000 Irish people experience depression. This paper aims
to address the accessibility of mental health services to individuals with depression. First, a simple logistic regression model is used to identify the determinants of depression at the national level. Secondly, the spatial distribution of individuals
with depression is estimated at the small area, ED level using a spatial microsimulation model. Finally, a spatial interaction model is used to analyse access to acute inpatient facilities at the national level and community-based facilities for individuals
with depression at the sub-national level. The policy implications of these results are discussed in relation to both the health care literature and current Irish health care policy.