Résultats de la recherche (654 résultats)

Affinez votre recherche

Par Collection Par Auteur Par Date Par Sujet Par Titre
  • Zum Zusammenhang von Parametern der Wassermengen und Wasserbeschaffenheit. (Relation between quantitative hydrological parameters and water quality)
  • By means of quality criteria COD-Mn, NO, substances which can be filtered of and phosphate components at two gaging stations at the River Elke in the section Dresden as well as an inflow gauge at a drinking water reservoir in the eastern Ore
  • , the quality of drinking water, changes in vegetation and others. - (IH)
  • The collection of 7 articles documents results of investigations made in the Institute of Geography and Geoecology in the last years. Main topics are the behaviour of leakage water and NO3, the influence of human activities on the state of soils
  • Effects of water on vegetation in Pollution and water resources. Pollution, coastal biology and water resources selected reports.
  • Modelling soil water supply to crops
  • The supply of water by the soil to meet the transpirational demand of crops, has been modelled on the assumption that water supply is directly related to soil water potential. Results of field testing and discussion.
  • Das Wasser der Erde. The water of the earth
  • 5 chapters : the earth as a water planet| the sea (dimensions, structure, natural resources, utilization, protection)| inland waters (rivers, lakes, underground water, glaciers)| utilization and protection of water| systematic explanations
  • On using the effective contact angle and the water drop penetration time for classification of water repellency in dune soils
  • Water repellency is commonly measured in one of two ways : by determining the contact angle between the water drop and the soil surface, and by counting the number of seconds it takes the water drop to penetrate into the soil. The purpose
  • of this study is to investigate which of the two tests is more suitable for measuring water repellency in dune soils.
  • The range of water temperature fluctuations in the limestone waters of the central and southern Pennines
  • Evaporation of water from sand: the effect of evaporation on the precipitation of salts dissolved in water stored in sand
  • Water development, supply, and managment. Volume II United Nations water conference. Summary and main documents.
  • The recommendations of the United Nations water conference (Mar del Plata, 1977) and related meetings on national water laws
  • Stability of clay aggregates as a function of water regimes in Impact of water and external forces on soil structure. Selected papers of the 1st Workshop on soilphysics and soilmechanics, Hannover 1986.
  • The experiments confirm the results that stability of clay aggregates is not only a matter of water content. Stability of clay aggregates is a function of their water regime, which is the result of the amount of water and the corresponding pressure.
  • Modszertani kisérlet a kornyezetpotencial geotermalis viz faktoranak kodolt értékrend szerinti minositésére (a meglevo kutak alapjan). (Methodological experiment to evaluate and to qualify the geothermal water potential of the environment (based
  • Geothermal water as an environmental factor is qualified through the classification of wells by their water output and water temperature. Other experiments would classify thermal waters by the degree and kind of their utilization and by the pattern
  • of geothermal gradient and type of water storage capacity of base rocks.
  • Soil compaction and water uptake of plants in Impact of water and external forces on soil structure. Selected papers of the 1st Workshop on soilphysics and soilmechanics, Hannover 1986.
  • This paper describes a method for studying the influence of soil compaction and soil structure on the water uptake of plants under controlled conditions.
  • Modelling water erosion and the impact of water repellency
  • Three years of weekly measurements of surface runoff and sediment yield from two small plots in a dune terrain along the Dutch coast have been used to model water erosion. This paper tries to establish simple estimates of sediment yield as well
  • Porownanie sk adu chemicznego wod glebowych i podziemnych obszaru kredowego. (The comparison of the chemical composition of soil and subsoil waters of the cretaceous area)
  • The chemical composition of soil waters, waters from draining pipes and subsoil waters occurring at various depths was compared, particularly with respect to elements biogenetic in nature. The investigations were carried out in the area in which
  • cretaceous sediments occurred. Changes in the chemical composition of waters were connected with atmospheric phenomena. The enrichment of rain waters with soluble substances was found to depend on the distance the waters must cover through soil accumulation
  • levels. The interdependence between the chemical composition of soil waters occurring at great depths was also encountered. (d'après l'A.).
  • Ground-water models for water resource planning in Ground-water.
  • Oberflächentemperatur einer arktischen Polynia: North Water im Winter.. (Surface temperature of an Arctic polynya: North Water during wintertime)
  • Arctique ; Banquise ; Canada ; Glace ; Glace de mer ; Gphy ; Géographie physique ; Hiver ; Mer polaire ; North Water ; Océan ; Polynie ; Température de surface ; Télédétection
  • The North Water (74-77 N, 70-78 W) between the Canadian High Arctic and Northern Greenland has no homogeneous ice cover during the winter and spring months (occurrence of polynyas). The purpose of the study is to investigate the state of the sea
  • Water resources planning and development in Pollution and water resources. Pollution, coastal biology and water resources selected reports.
  • Water balance computations for larger regions based on calibrated models of gauges catchments in Hydrological research basins and the environment.
  • The continuously increasing stress on water resources with respect to quantity as well as quality, the conflicts arising from multifunctional use of the available water, and environmental considerations which are growing more and more important
  • , urge for an accurate knowledge of the water resources and their distribution in time and space. In an attempt to explore the boundary conditions for water management in Flanders, water balance computations are carried out for the Flemish Region
  • , and for 27 geographical subregions as defined in the General Water Treatment Scheme of the Flemish Government.