(1903-1971) ; Carbonate ; Craie ; France ; Géographie de l'Europe ; Hydrogéologie ; Nappe aquifère ; Nappe libre ; Nord, région ; Pas-de-Calais ; Prévision ; Surface piézométrique ; Série chronologique
According to 60years long piezometric data, in the chalky aquifer of northern France, one can shows that extreme events are not recent facts in spite of the drought of 1976. Statistical distribution of levels for each month is used to draw a simple
network on which it is possible to compare one year with the others. For predicting stochastically piezometric levels, piezometric differences between a given month to its following have been studied. It appears that variations are erratic during winter
Design and installation of a combined automatic tensiometer-piezometer system
Eau du sol ; Géographie physique ; Instrumentation ; Malaisie ; Piézomètre ; Pression des pores ; Sol ; Technique de recherche ; Tensiomètre ; Versant
An automatic data logger system for monitoring tensiometers, piezometers, and auxiliary equipment is described. The results from the installation examples in Malaysia illustrate that significant changes in the soil water conditions on unprotected
Genesis of an endoreic piezometric coastal depression in sub-Sahelian Western Africa : the Continental Terminal Aquifer of Trarza (Mauritania)
The Trarza Aquifer is the main resource of drinkable water for Nouakchott. After reviewing the main mathematical models for piezometric depression, this study attempts a conceptualization of the piezometric evolution of this phreatic aquifer
This paper describes the characteristics and possible origins of massive surface and sub-surface silcretes at Samedupe and Boro Junction, beyond the distal margin of the Okavango Delta. Morphological and petrological evidence from surface exposures
and 3 sedimentary cores suggests that other modes of formation may also be applicable. A dual model of formation is proposed : surface silcretes are suggested to have developed by silica accumulation in seasonal pools remaining after the annual Okavango
flood, whilst sub-surface horizons appear to have formed under conditions of varying pH associated with fluctuating groundwater levels beneath the channel floor.
Dans un bassin-versant de forêt tropicale des piézomètres de faible profondeur répondent instantanément aux chutes de pluie. Afin de comprendre le mécanisme de pénétration de l'eau dans le sol, on injecte de l'eau au tritium sous la surface qui
European part of Russia ; Groundwater ; Impact ; Mineralization ; Moscow ; Piezometric level ; Runoff
L'orientation du mouvement d'eaux souterraines minéralisées de façon non homogène dépend de la position spatiale des surfaces (plans) d'égale minéralisation : le mouvement des eaux se produit du côté de leur pente. Exemple du secteur de l'aile ouest
Structural control on surface flow in karstic environment
Aquifer hydrodynamical properties, hydrogeological tracing, mapping and piezometric monitoring characterised underground flow in calcareous environments. Surface flow study during low-water season showed water supply heterogeneity due to calcareous
Czech Republic ; Discharge ; Floodplain ; Hydrology ; Lužnice river ; Piezometric level ; Spatial variation ; Stream ; Stream flow ; Surface water ; Temporality ; Underground water
Cours d'eau ; Débit ; Eau de surface ; Eau souterraine ; Ecoulement fluvial ; Hydrologie ; Lužnice ; Niveau piézométrique ; Plaine d'inondation ; Tchèque république ; Temporalité ; Variation spatiale
This paper presents preliminary results of an assessment of the groundwater – surface water (GW-SW) interaction processes of the Lužnice River floodplain during a selected time period, comprising high and low stream flow. It analyses various events
Bog ; Carbon dioxide ; Diffusion ; Ecosystem ; European part of Russia ; Piezometric level ; Soil water ; Surface temperature ; Tundra
Diffusion ; Dioxyde de carbone ; Eau du sol ; Ecosystème ; Marais ; Niveau piézométrique ; Russie d'Europe ; Température de surface ; Toundra
Les principaux facteurs déterminant l'émission de CO2 dans un massif marécageux sont la température de surface du marais et la position du niveau des eaux du marais.
of the surface waters and vegetation isotopic signatures in order to assess the extent to which conservation and rehabilitation practices have allowed the wetlands to return to its former status. Results of the hydrochemistry from the installed piezometers showed
Caucasus ; Don ; European part of Russia ; Geomorphology ; Landform evolution ; Landscape ; Landscape ecology ; Piezometric level ; Planned landscape ; Road ; Soil ; Steppe
redistribution des écoulements, le relèvement de la surface piézométrique et l'apparition de processus n'appartenant pas au territoire. L'accumulation et la dénudation changent la stabilité des modelés.
Geographical information system ; Hydrology ; Mass movement ; New Zealand ; Piezometric level ; Slope dynamics ; Slope gradient ; Soil moisture ; South Island ; Topography ; Watershed
Measurements from an instrumental network in a small area have been used to establish index-based models for topographic and climate-related controls of piezometric response. The example, in this study, uses the topography index of TOPMODEL, in GIS
Relationships between soil color patterns and depth and duration of water tables were studied using piezometers in three soil hydrosequences that had developed from different colored parent materials. Insufficient low chroma colors was the primary