GLORIA

GEOMAR Library Ocean Research Information Access

feed icon rss

Ihre E-Mail wurde erfolgreich gesendet. Bitte prüfen Sie Ihren Maileingang.

Leider ist ein Fehler beim E-Mail-Versand aufgetreten. Bitte versuchen Sie es erneut.

Vorgang fortführen?

Exportieren
Filter
  • Springer  (14)
  • [s.l.] : Springer-Verlag  (1)
  • 1
    Online-Ressource
    Online-Ressource
    [s.l.] : Springer-Verlag
    Schlagwort(e): Migration ; Geography ; Economic geography. ; Geotechnical engineering. ; Emigration and immigration. ; Geography ; Migration ; Georgien ; Geografie
    Beschreibung / Inhaltsverzeichnis: Introduction -- Section 1: Historical and Political Geography -- Ancient History -- Historical and Political Geography -- Ethnic Groups and Religions -- Demographics -- Sociocultural Geography -- Section 2: Geological Processes -- Geology -- Geodynamical Processes -- Glacial and Periglacial Processes -- Section 3: Ecological Processes -- Landscapes -- Deforestation and Reforestation -- Desertification -- Ecosystems -- Anthropogenic Impact on Environment.-Section 4: Developmental Geography -- Economical History -- Economics -- Natural Resources -- Sustainable Development -- Global Warming and Climate Change.-Law and Government.
    Materialart: Online-Ressource
    Seiten: Online-Ressource (XVIII, 228 p. 187 illus., 150 illus. in color, online resource)
    ISBN: 9783319054131
    Serie: World Regional Geography Book Series
    RVK:
    Sprache: Englisch
    Anmerkung: Description based upon print version of record , IntroductionSection 1: Historical and Political Geography -- Ancient History -- Historical and Political Geography -- Ethnic Groups and Religions -- Demographics -- Sociocultural Geography -- Section 2: Geological Processes -- Geology -- Geodynamical Processes -- Glacial and Periglacial Processes -- Section 3: Ecological Processes -- Landscapes -- Deforestation and Reforestation -- Desertification -- Ecosystems -- Anthropogenic Impact on Environment.-Section 4: Developmental Geography -- Economical History -- Economics -- Natural Resources -- Sustainable Development -- Global Warming and Climate Change.-Law and Government.
    Standort Signatur Einschränkungen Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 2
    Digitale Medien
    Digitale Medien
    Springer
    Environmental management 21 (1997), S. 367-393 
    ISSN: 1432-1009
    Schlagwort(e): KEY WORDS: India; Water resources; Groundwater; Surface water; Surface water pollution; Groundwater pollution; Sustainable development
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Energietechnik
    Materialart: Digitale Medien
    Standort Signatur Einschränkungen Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 3
    Digitale Medien
    Digitale Medien
    Springer
    Stochastic environmental research and risk assessment 8 (1994), S. 233-258 
    ISSN: 1436-3259
    Schlagwort(e): Flood ; China ; river ; sampling variance
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Architektur, Bauingenieurwesen, Vermessung , Energietechnik , Geographie , Geologie und Paläontologie
    Notizen: Abstract The sampling variance of a T-year flood when estimated using a curve-fitting method results from the errors in hydrologic observations, plotting positions, and model-fitting. This paper develops a method to quantify the contribution of plotting positions to the sampling variance of the T-year flood magnitude. Application of the method to 150 flood-flow data sets of 41 rivers in the People's Republic of China show that the errors due to plotting positions contribute more to the sampling variance than others.
    Materialart: Digitale Medien
    Standort Signatur Einschränkungen Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 4
    Digitale Medien
    Digitale Medien
    Springer
    Irrigation science 15 (1994), S. 113-121 
    ISSN: 1432-1319
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft
    Notizen: Abstract A moving control volume approach was used to model the advance phase of a furrow irrigation system whereas a fixed control volume was used to model the nearly stationary phase and the runoff rate. The resulting finite-difference equations of the kinematic-wave model were linearized and explicit algebraic expressions were obtained for computation of advance and runoff rate. The solutions for the advance increment and the runoff rate were compared with the nonlinear scheme, the zero-inertia model, and a set of field data. A close agreement was found between the models and the field data. Assuming a constant infiltration rate, a differential equation was derived to estimate the error between the kinematic-wave model and the zero-inertia model in predicting the flow cross-sectional area along the field length. The differential equation and two dimensionless terms were used to define the limits for use of the kinematic-wave model in furrow irrigation.
    Materialart: Digitale Medien
    Standort Signatur Einschränkungen Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 5
    Digitale Medien
    Digitale Medien
    Springer
    Environmental monitoring and assessment 42 (1996), S. 265-283 
    ISSN: 1573-2959
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Energietechnik
    Notizen: Abstract A micro computer model was developed for routing chemical waste contamination through a small aquatic system. The capabilities of this simulation model include the following characteristics: a) It distributes contamination by advection and dispersion along the longitudinal axis of the system. b) It may be discretized into any number of segments (vertical planes normal to the longitudinal axis) as may be appropriate to describe spatial variations in chemical contamination. c) It is capable of treating instantaneous, continuous, or time varying releases of chemical waste contamination. d) It provides for temporal description of contamination throughout the system. e) It provides for adsorption and desorption by both vegetation and bottom sediments. The model can be run on microcomputer with Fortran compiler. The model applied to two small streams which are located in U.S.A., and Canada. The model results compared well with observed data. The dispersion parameter was computed by the model.
    Materialart: Digitale Medien
    Standort Signatur Einschränkungen Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 6
    Digitale Medien
    Digitale Medien
    Springer
    Water, air & soil pollution 89 (1996), S. 77-90 
    ISSN: 1573-2932
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Energietechnik
    Notizen: Abstract The finite element model was successfully applied to predict the Pb-210 and total extractable fatty acid concentrations at different depths in two sediment cores from Lake Ontario by using different transport parameters. The transport parameters were computed from Pb-210 data. These parameters were used to simulate the total extractable fatty acid concentrations at different depths. The computed results were compared with observed data and results were compared by statistical methods. Good agreement was achieved though improved results were observed in a two layer model accounting for bioturbation in the upper 4–6 cm of sediment. By modifying this model is useful to apply the contaminant transport in lake sediments, industrial waste disposal ponds, and fish ponds with different geological, physical, chemical and biological parameters at different depths.
    Materialart: Digitale Medien
    Standort Signatur Einschränkungen Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 7
    Digitale Medien
    Digitale Medien
    Springer
    Water resources management 8 (1994), S. 265-284 
    ISSN: 1573-1650
    Schlagwort(e): Groundwater ; pollution ; finite difference method ; dispersion ; density dependent
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Architektur, Bauingenieurwesen, Vermessung , Geographie
    Notizen: Abstract A two-dimensional cross-section finite difference model is presented to simulate density dependent leachate migration in leaky aquifers. Unlike existing models, a new approach is adopted to couple the groundwater-flow equation and the hydrodynamic dispersion equation with the elimination of the intermediate step of calculating velocities. The concept of the reference density is employed, permitting increased accuracy (over pressure-based models) in the representation of the transport process. The model is then used to study the effect of several hydraulic and transport parameters on the flow pattern and plume migration which are found to be very sensitive to most of these parameters. Equiconcentration and equipotential lines are overlapped to provide a better understanding of the coupling effect.
    Materialart: Digitale Medien
    Standort Signatur Einschränkungen Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 8
    Digitale Medien
    Digitale Medien
    Springer
    Water resources management 1 (1987), S. 199-221 
    ISSN: 1573-1650
    Schlagwort(e): Breach erosion ; earthfill dam ; BEED model ; peak discharge ; Chezy ; Manning ; sensitivity analysis ; simulated discharge ; South Fork Dam ; Buffalo Creek Dam ; Teton Dam
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Architektur, Bauingenieurwesen, Vermessung , Geographie
    Notizen: Abstract In Part I, the earthen dam breach erosion was analyzed. To this end, the BEED (breach erosion of earthfill dams) model was modified and extended. In this paper, Part II of the series, the extended BEED model is applied to three historical cases: South Fork Dam, Buffalo Creek Dam, and Teton Dam. The testing before it can be used for forecast purposes. A sensitivity analysis of the model to its parameters shows that the model is very sensitive to friction factors; Chenzy's for breach erosion, and Manning's for flood routing.
    Materialart: Digitale Medien
    Standort Signatur Einschränkungen Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 9
    Digitale Medien
    Digitale Medien
    Springer
    Water resources management 4 (1990), S. 123-134 
    ISSN: 1573-1650
    Schlagwort(e): Coastal aquifers ; cyclic flow ; dispersion ; finite element method ; Galerkin's method ; molecular diffusion
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Architektur, Bauingenieurwesen, Vermessung , Geographie
    Beschreibung / Inhaltsverzeichnis: Resumé Pendant les dernières quelques années, le transport des contaminants dans les aquifères a reçu une attention considerable. Aux aquifères de la côte, il existe des zones où l'eau salé et l'eau douce se dispersent quand le flux de l'eau et le transport des ions du sel s'unissent. Le patron de flux [flow pattern] des fluides miscibles qui ont des différents unités de poids est characterisé par le flux cyclique au bord de la côte la largeur de la region de dispersion est considerable, et les suppositions de ‘'interface tranchante’ [sharp interface] peut conduire a des faux résultats. Pour mieux comprendre le phénomène de l'instrusion de l'eau salé, le modèle des ‘éléments limités’ [finite element] a été appliqué dans deux problèmes dejà publiés. L'effet de l'abaissement piezométrique à cause du pompage excessif a été étudiés. Les paramètres physique ont été extraits des cas dejà étudiés, conduits par Rouven-Stoessinger et Kawatani, et la comparaisons avec leurs résultats a été fait.
    Notizen: Abstract Transport of contaminants in aquifers has received considerable attention over the past few years. In coastal aquifers, a dispersion zone between saline water and fresh water exists where the flow of water and transport of salt ions are coupled. The flow pattern of two miscible fluids of different unit weights is characterized by the cyclic flow at the shore boundary. The width of the dispersion zone may be considerable, with the sharp interface assumption leading to erroneous results. A finite element model was applied to two prepublished problems for purposes of obtaining a better understanding of the saline water intrusion phenomenon. The effect of lowering the piezometric head due to excessive pumping was investigated. Physical parameters were extracted from the studies conducted by Kawatani and Rouve and Stoessinger, and comparison with their results was made.
    Materialart: Digitale Medien
    Standort Signatur Einschränkungen Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 10
    Digitale Medien
    Digitale Medien
    Springer
    Water resources management 10 (1996), S. 219-240 
    ISSN: 1573-1650
    Schlagwort(e): Water quality modelling ; uncertainty analysis ; function analysis ; Monte Carlo method
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Architektur, Bauingenieurwesen, Vermessung , Geographie
    Notizen: Abstract To achieve effective environmental control, it is important to develop methodologies for dealing with uncertainties in model simulation of pollution behaviour and effects. Several procedures have been proposed to quantify uncertainties in modelling studies. This paper utilizes the two methods that are widely applied, i.e. functional analysis and Monte Carlo Simulation. The first-order part of the functional analysis method provides a measure of uncertainties in dependent variables in terms of uncertainties in independent variables. The procedure is based on first-order terms in the Taylor series expansion of the dependent variable about its mean value with respect to one or more independent variables. The major assumption in this procedure is that all independent and dependent variables are the second moment variables (SMV), which means that the behaviour of any SMV is completely described by its mean and standard deviation. The mathematical simplicity of the procedure allows application by simple input-output models. Consequently, it has been applied to many environmental simulators, e.g. hydrological models, stream water quality models, lake water quality models and ground water pollution models. The Monte Carlo Simulation (MCS) method uses a large number of repeated trials or simulations with the values for stochastic inputs or uncertain variables selected at random from their assumed parent probability distributions to establish an expected range of model uncertainty.
    Materialart: Digitale Medien
    Standort Signatur Einschränkungen Verfügbarkeit
    BibTip Andere fanden auch interessant ...
Schließen ⊗
Diese Webseite nutzt Cookies und das Analyse-Tool Matomo. Weitere Informationen finden Sie hier...