Comparing the behaviour of aluminium species within the hydrological cycle in Westland, New Zealand, and the Fichtelgebirge, Germany
Aluminium ; Bavaria ; Catchment area;Watershed ; Geochemistry ; Germany ; New Zealand ; Rill wash;Runoff ; Soil ; South Island ; Watercycle;Water circulation
Allemagne ; Aluminium ; Bassin-versant ; Bayern ; Cycle de l'eau ; Géochimie ; Nouvelle-Zélande ; Ruissellement ; Sol ; South Island
In order to evaluate the effect of the deposition of strong mineral acids into river basins with low capacity of acid neutralization, the AA. want to compare the behaviour of Al species within the hydrological cycle, e.g. during their passage
Expose différentes interprétations du terme « cycle de l'eau global », compare les structures de ses composantes continentales. La principale source des ressources en eau d'un continent : l'humidité advective arrivant avec les masses d'air depuis
Hydrology ; Model ; South Africa ; Water ; Watercycle ; Water management ; Water resources
Afrique du Sud ; Cycle de l'eau ; Eau ; Gestion de l'eau ; Hydrologie ; Modèle ; Ressource en eau
Finding solutions to the many water resource utilisation problems that face South Africa has been the driving force behind a large part of the hydrological research that has been undertaken in the country. The changing face of South Africa
and the requirements of managing water in a transformed, democratic society have made the need for cooperation across various discipline even more essential. - (AJC)
Local perceptions about forests and water in two tropical catchments
Environmental perception ; Forest ; India ; Perception ; Thailand ; Tropical rain forest ; Tropical zone ; Water ; Watercycle ; Watershed
Bassin-versant ; Cycle de l'eau ; Eau ; Forêt ; Forêt tropicale ; Inde ; Perception ; Perception de l'environnement ; Thaïlande ; Zone intertropicale
Cette étude essaie d'établir comment les habitants de deux bassins-versants tropicaux prennent en compte les forêts et perçoivent à la fois les forêts et leur propre capacité à influencer le cycle hydrologique. Les fonctions de service et de
, laboratory experiments were carried out to investigate how freezing-thawing or wetting-drying cycles, under controlled conditions, affect structure and porosity. Data from wetting-drying cycles showed that changes in water content alone did not produce deep
structural modifications. A mechanism of alteration of soil sructure during freezing-thawing cycles is proposed.
Regulation of the soil water regime under furrow irrigation
Agropedology ; Arid lands ; Irrigation ; Mathematical model ; Methodology ; Soil ; Soil moisture;Soil water ; Water balance ; Watercycle;Water circulation
Agropédologie ; Bilan hydrologique ; Cycle de l'eau ; Domaine aride ; Eau du sol ; Irrigation ; Modèle mathématique ; Méthodologie ; Sol
An experimental computational method is proposed for determining the irrigation regime of agricultural crops and losses of irrigation water by infiltration beyond the root zone of the soil, based on information on soil moisture suction or soil
. A relationship is proposed approximating the curve of soil water intake. Results of calculations of the irrigation regime of cotton by the proposed method showed that the irrigation rate and the rate of infiltration of irrigation water decrease as the soils
become finer in texture and the water table rises.
Sur la base d'une modélisation par simulation, on donne une évaluation des changements possibles des processus du cycle hydrologique dans la partie supérieure de la section de la zone d'aération de contact steppe-forêt de l'oblast de Koursk pour
Study of water surface exploration at Yucheng integrated experimental station, Shandong, China
Chine ; Cycle de l'eau ; Eau ; Evaporation ; Expérimentation ; Géographie de l'Asie ; Shandong
The relationships between evaporation form water surfaces and factors such as meteorological parameters, surface area and depth of water bodies, structure of evaporation pans and its installation have been analyzed. The daily, yearly and interannual
variations of evaporation from water surfaces are also discussed.
of different factors on watercycle. The stable oxygen isotope in precipitation has marked temperature effect either under synoptic or seasonal scale at the head of Urumqi River. Presentation and discussion of the results of delta O 18 in precipitation
The variations of the stable oxygen isotope in different water mediums in Urumqi River Basin are analysed to provide the basic isotope data for the application of environmental isotopes in hydrological investigations and assess the impact
, in surface firn, in glacier meltwater and in stream water.
Le cycle de l'eau dans l'atmosphère à partir des données satellites
Atmosphere ; Climatic variation ; Methodology ; Precipitation ; Remote sensing ; System ; Watercycle ; Water vapor
Atmosphère ; Cycle de l'eau ; Méthodologie ; Précipitation ; Système ; Télédétection ; Vapeur d'eau ; Variation climatique
Les paramètres du cycle de l'eau dans l'atmosphère sont particulièrement importants pour apprécier les variations climatiques. Leur observation régionale et globale fait l'objet de nombreux programmes de recherche internationaux. L'A. met en
measurements. 2. Quantitative and qualitative watercycle aspects in heterogene basins. Le thème II se répartit en 2 grandes parties : 1. Impact des réservoirs artificiels sur l'équilibre écologique. 2. Run off processes and slope development. - (HV)
Environmental degradation ; Forest ; Human impact ; Ivory Coast ; Precipitation ; Savanna ; Tropical zone ; Water ; Watercycle ; Water regime
Action anthropique ; Cycle de l'eau ; Côte d'Ivoire ; Dégradation de l'environnement ; Eau ; Forêt ; Perte en eau ; Précipitation ; Régime hydrique ; Savane ; Zone intertropicale
L'ampleur des interventions humaines est telle que le petit cycle d'eau en Côte d'Ivoire a subi de graves conséquences, ce qui provoque des pertes d'environ 10-20% des précipitations annuelles. - (CN)