Impact of climate change on water temperature in reservoirs (Sulejów Reservoir case study)
Hydrological processes and water resources in the face of global climate change
Bilan énergétique ; Changement global ; Ecosystème ; Ecosystème aquatique ; Evaporation ; Modèle ; Pologne ; Réchauffement climatique ; Simulation ; Température de l'eau ; Variation climatique
Aquatic ecosystem ; Climatic variation ; Climatic warming ; Ecosystem ; Energy balance ; Evaporation ; Global change ; Model ; Poland ; Simulation ; Water temperature
This paper investigates the possible impact of climate change on physical and biological processes in storage reservoirs supplying water for domestic use and industry. As a case study the water temperature and evaporation in Sulejów Reservoir
, Central Poland, will be simulated for a number of climate scenarios. An energy balance model for a non-stratified (or weakly-stratified) lake was applied. Reservoir temperature is shown to be highly sensitive to changes in air temperature.
Aquatic ecosystem ; Climatic warming ; Ecosystem ; Geochemistry ; Global change ; Heavy metals ; Pollution ; Water quality
The forecast climatic warming will cause hydrological changes on Earth which will be accompanied by changes to the chemism and quality of waters. On account of their wide-spread occurrence and permanence, it is heavy metals in the bottom sediments
A coastal historical evolution of the Yangtze River Delta was discussed in this paper on the basis of the historical data of the coastal zone and an estimation was made for the future change of the coast. The emphasis is put on the future climate
change that will have influence on the sea wall, coastal navigation and freshwater resources in the Delta. In addition, some measures describing how to adapt to the climate change and reduce its impact are put forward.
L'étude des glaces de l'Antarctique est particulièrement intéressante dans le contexte des changements globaux si l'on s'intéresse par exemple à l'information donnée par les sondages profonds sur les changements paléoenvironnementaux, à la question
de la stabilité de la calotte glaciaire et à ses conséquences sur les changements du niveau marin, aux interactions entre la calotte glaciaire et l'atmosphère et à l'étude des propriétés des glaces de mer qui interagissent avec les ciculations
Biodiversity ; Biogeochemical cycle ; Carbon ; Climatic variation ; Environment ; Environmental management ; Global change ; Human impact ; Impact ; Nitrogen ; Population growth ; Quaternary ; World
Past and current trends in environmental change are examined in terms of their impact on biogeochemical cycles of carbon, nitrogen and sulphur at scales from the local to the global. The major issues concern fossil fuel consumption which influences
all three cycles, and agriculture which affects the carbon and nitrogen cycles in particular. Anthropogenic pertubations of these cycles has given rise to some of the most important environmental issues of the 1990s, notably global climatic change
The influence of climate changes on demand for irrigation water in Poland
Hydrological processes and water resources in the face of global climate change
Besoin en eau ; Changement global ; Circulation atmosphérique ; Gestion de l'eau ; Hydrométéorologie ; Irrigation ; Modèle ; Pologne ; Prévision ; Variation climatique
Atmospheric circulation ; Climatic variation ; Forecast ; Global change ; Hydrometeorology ; Irrigation ; Model ; Poland ; Water management ; Water needs
Possible future growth in Poland's demand for irrigation water is analysed in relation to possible climate change by comparing demand for 1951-1990, estimated on the basis of hydrometeorological data, with that for 1991-2050 determined on the basis
Changing urban systems : an empirical analysis at two spatial levels
Analyse spatiale ; Changement urbain ; Flux ; Marché du travail ; Migration alternante ; Pays-Bas ; Réseau ; Système urbain ; Ville
Commuting ; Flow ; Labour market ; Netherlands (The) ; Network ; Spatial analysis ; Town ; Urban change ; Urban system
Les changements dans le système urbain proviennent de plus en plus de l'interdépendance des niveaux local et régional. Cela nécessite un cadre qui prend en compte les processus qui interviennent aux deux niveaux. A partir d'une analyse empirique de
la structure des migrations alternantes et des marchés urbains du travail aux Pays-Bas, l'A. propose un cadre qui rapporte les changements intervenus dans le système urbain à ceux qui concernent la structure régionale de l'emploi.
Changement social dans une période de changement politique
Adaptation ; Capitalisme ; Changement social ; Géographie politique ; Italie ; Mutation politique ; Société ; Stratégie économique ; Système économique
Adaptation ; Capitalism ; Economic strategy ; Economic system ; Italy ; Political geography ; Political reform ; Social change ; Society
A detailed 31,000-year record of climate and vegetation change, from the isotope geochemistry of two New Zealand speleothems
This paper presents continuous high-resolution stable isotope records of environmental change in New Zealand from speleothems that grew over the last 31,000 yr. Oxygen isotope variation in these speleothems primarily represents changes
in the meteoric waters falling above the caves, possibly responding to latitudinal changes in the position of the Subtropical Front in the Tasman sea. Carbone isotope variations in the speleothems record changes in forest productivity, closely matching existing
The dune systems of the Konya plain (Turkey) : their relation to environmental changes in Central Anatolia during the Late Pleistocene and Holocene
Special issue. Geomorphic response of mediterranean and arid areas to climate change
Several sand flats located on the northern shores of the Late Pleistocene palaeolake of the Konya plain are related to changes in lake levels. In this paper, the two main dune systems are mapped according to their geomorphological, sedimentological
and dynamic characteristics, and their significance is discussed with regard to the environmental changes since the Late Pleistocene, both at time of the former lake and during the drier periods of the Holocene. The success of the stabilization programme
of the dunes over the last 30 years shows that the last period of dune movement is not related to climate change but to overpressure on the land.
Changement de paradigmes dans la géographie des loisirs
L'A. étudie le changement du paradigme ressource dans la géographie des loisirs en paradigme social et la formation d'une branche unique de la géographie, la récréologie. Il note le rôle de V.S. Preobraženskij dans ce processus.
The impact of vegetation changes on evaporation and runoff
Research context and methodology are considered for the determination of the impact of vegetation changes on evaporation and runoff. Most of the important advances in understanding of the problem since 1948, have resulted from combining
Changes in commuting flows in metropolitan areas, Japan : effects of cohort size and female labour
The purpose of this study is to consider the changes in commuting flow in the three major metropolitan areas in Japan in terms of cohort size and female labour using longitudinal data on residential, occupational and family careers and cohort
Administrative division system changes and urbanization in China
Relation entre les changements de structure administrative et le processus d'urbanisation en Chine au cours des années 1980, province du Guangdong. Transfert de certains pouvoirs administratifs aux gouvernements locaux afin de mobiliser leurs
Biogéochimie ; Biomasse ; Changement global ; Cycle de l'eau ; Cycle du carbone ; Géochimie ; Holocène ; Pléistocène
Biogeochemistry ; Biomass ; Carbon cycle ; Geochemistry ; Global change ; Holocene ; Pleistocene ; Water cycle
In short review paper, the A. discusses the role of studies on changes in the continental water cycle for a better understanding of temporal change in biomass production and carbon storage. All calculations made for the late Pleistocene and Holocene
Les changements de la structure par âge en République tchèque
Age group ; Czech Republic ; Demographic change ; Demographic structure ; Demography ; Population ageing
Dans les années 1990, le vieillissement de la population tchèque a augmenté, non seulement par le bas mais aussi par le haut de la pyramide de l'âge. L'âge moyen et médian ont augmenté. L'influence des conséquences de ces changements sur l'économie
The effects of forest diching and water level changes on sediment quality in a small lake, Perhonlampi, Central Finland
The aim of this paper was to explore the effects of ditching and natural/artificial water level changes on sedimentation, total metal, P and S concentration and speciation of Cu, Fe, Mn and Zn compounds in a small lake. The clearest geochemical
and sedimentological changes are caused by forest ditchings at 1971 and 1980.
Changement global ; Environnement ; Environnement global ; Gestion de l'environnement ; Gestion des ressources ; Recherche ; Recherche géographique ; Utilisation du sol
Environment ; Environmental management ; Geographic research ; Global change ; Global environment ; Land use ; Research ; Resource management
L'A. examine les points suivants : la recherche globale sur l'environnement entre les sciences naturelles et les sciences sociales, le changement global et la sécurité humaine, l'utilisation du sol et le changement de la couverture du sol, la
Changement global ; Climat ; Climatologie ; Congrès ; Date 1998 ; Environnement ; Environnement global ; Portugal ; Union Géographique Internationale ; Variation climatique
Climate ; Climatic variation ; Climatology ; Congress ; Environment ; Global change ; Global environment ; International Geographical Union ; Portugal
Résumés des communications présentées à la Conférence de la Commission de climatologie de l'UGI réalisée à Évora (Portugal) le 24/08/1998. - (DBF)