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.
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.
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.).
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 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.