Some thermodynamic criteria for river channel changes
A theoretical model of river channel changes is presented, which shows some nonequilibrium thermodynamic criteria of a river channel to bedding and equilibrium.
Concepts of equilibrium and evolution in geomorphology : the model of branch systems
Concept ; Equilibre ; Géographie physique ; Géomorphologie ; Modèle ; Système ; Théorie des systèmes
problems of causality, arising from differing spatial and temporal scales of study, have been incorporated into geomorphic understanding of systems. The final objective is : 4) to suggest a general conceptual model, based on recent thermodynamic concepts
The objectives of this paper are : 1) to review the definition and use of equilibrium concepts in geomorphology| 2) to examine how concepts of system evolution and historical constraint have been incorporated into geomorphology| 3) to discuss how
of equilibrium and evolution, which will integrate, and hence provide a perspective on historical and non-historical views of geomorphic systems.
In the thermodynamic theory of aquatic ecosystems the non-linear relations between rates and affinities of biological processes, such as primary production, respiration, grazing etc. can be determined using an optimun principle. Especially
-year sea ice. Finally, they discuss the annual evolution of the Arctic system through snow thermodynamic and aeolian processes, with linkages to microwave remote sensing.
The AA. provide a summary of the current state of knowledge pertaining to the geophysical, thermodynamic and dielectric properties of snow on sea ice. They first give a detailed description of snow thermophysical properties such as thermal
Cosmos ; Cristallin ; Eau ; Géochimie ; Géochimie minérale ; Géographie physique ; Hydrochimie ; Lune ; Magma ; Métamorphisme ; Météorite ; Roche ; Système aquatique ; Système géochimique ; Système magmatique ; Système métamorphique ; Terre
reviews and discusses the chemical principles structural, thermodynamic and kinetic involved in element distribution in igneous and metamorphic rock systems and discusses the uses of isotopes in problems of petrogenesis and ore genesis. The third part
Non-invasive geophysical investigation and thermodynamic analysis of a palsa in Lapland, Northwest Finland
Climatic warming ; Cold area ; Collapse structures ; Finland ; Geophysics ; Ground penetrating radar ; Humid environment ; Model ; Northwest Finland ; Palsa ; Permafrost ; Soil temperature ; Thermodynamics
Non-invasive geophysical prospecting and a thermodynamic model were used to examine the structure, depth and lateral extent of the frozen core of a palsa near Lake Peerajärvi. A simple thermodynamic model verified that the current climatic
core of the palsa. The presence of the frozen core could also be traced as minima in surface temperature and ground conductivity measurements. These field methods and thermodynamic models can be utilised in studies of climate impact on Arctic wetlands.
The AA. intend to consider phenomenological as well as statistical thermodynamic landscape models. From maps, the entropy of various landscapes will be calculated according to the two types of models mentioned and conclusions will be drawn regarding
Asian part of Russia ; Ecology ; Hydrodynamics ; Lake ; Modelling ; Natural environment ; Nuclear power station ; Reservoir ; Thermodynamics ; Water temperature ; Yekaterinburg
calculs sont utilisés comme indices de base pour la mise en place du système de distribution de l’eau de la centrale nucléaire et de son fondement écologique.
Climatic change ; Ecosystem ; Environmental management ; Eutrophication ; Human impact ; Hydrodynamics ; Lake ; Model ; Nature conservation ; Pollution ; Thermodynamics ; World
Etude de réalisation et d’utilisation de modèles d'écosystèmes lacustres comme partie intégrante de l’étude d’ensemble du système écologique des lacs, des processus d’eutrophisation, du transport et de la transformation des substances. Toutes ces
Biosphere ; Concept ; History of geography ; Planetology ; Russia ; Thermodynamics ; Twentieth Century
thermostatique comme un ensemble statistique. Il introduit la notion de l’information anthropique, une variable thermodynamique naturelle qui détermine la formation de la noosphère. L’A. affirme que le système présenté par Vernadskiï répond entièrement à la
With the help of thermodynamic parameters is proved, that non-regenerative waste deposits in any case wear an enormous dangerous potential. Non-regenerative deposits (for example special, poison, noxious and selective deposits) must be handled
as long as such kind of deposits as the deposited substances are a dangerous potential for the biosphere. From the thermodynamical point of view there exist no tight deposits. Regenerative deposits (for example municipal wastes, mixed noxious and building