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The paper presents the results of water balance calculations for the Zdworskie Lake, Poland, based on meteorological and hydrological data of 2008–2012 period. Meteorological data have come from automatic measurement station located near Łąck in a distance of about 7.5 kilometer from geometric center of the Zdworskie Lake. The station is a part of the monitoring system of The State Forests National...
The paper presents the research carried out in the lower basin of Biebrza River valley in order to identify interception for natural wetland plant communities. Maximum interception, i.e. the largest amount of water, expressed in millimeters, which can be captured and retained by plant canopy from rainfall is one of the key parameters of the water cycle modeling. Maximum interception was determined...
The paper presents the results of measurements of some physical properties for 14 drained fen peat-moorsh layers (degree of decomposition, bulk density, particle density, porosity and saturated moisture content). The soil samples were taken from north- -east, central and east part of Poland. These areas were drained in order to use as a grassland and meadows. The article presents obtained data of...
Geotechnical problems that are characterized by a high degree of complexity and uncertainty with respect to the input data are solved recently, using the Bayesian analysis (for instance the problem of a cautious estimation of the geotechnical characteristic parameters according to the Eurocode 7 requirements). The applicability of the Bayesian approach to geotechnics via a simple examples related...
In the ecologically sensitive Himalayan region, land transformations and utilization of natural resources have modified water flow patterns. To ascertain future sustainable water supply it is necessary to predict water flow from the watersheds as affected by rainfall and morphological parameters. Although such predictions may be made using available process-based models, in mountainous and hilly areas...
Nearly one third of the high quality water in households is used for flushing toilets. Water resources in Poland are relatively poor. Therefore the use of water of inferior quality parameters to flush the toilet bowls is satisfactory. It is possible to use for this purpose the greywater from the washing of the body (the bath water) after treating it to the level which doesn’t threatens human life...
The purpose of the work is to evaluate the variability of bioclimatic conditions and their diversity in areas of a different degree of anthropogenic transformation. An important element of the work is to determine frequency of certain biothermal conditions in the analysed areas, strongly exposing the human body to heat and causing thermal stress of a various intensity. The most important meteorological...
The article presents the results of studies on the mechanical properties of the broadleaf cattail Typha latifolia and reed sweet grass Glyceria maxima. The necessary study samples were collected from Lake Urszulewskie near Sierpc, Poland. The experiment was conducted using an Instron 5966 universal tensile strength testing machine. Tensile forces and the tensile strength of the individual parts of...
One of the most important activities when preparing a land reclamation project of brow fields is a comprehensive analysis and documentation of subsoil conditions at the site. The article presents site investigation methodology conducted for the purpose of preparing land reclamation project of the metallurgical waste landfill, located in a close vicinity of a developed big city. The landfill was a...
Design of road pavement is connected with estimation of mechanical properties of each of the materials used for construction. This statement presents the need of estimating the mechanical moduli. For the purposes of this article, tests were carried out in order to establish physical and mechanical properties, especially penetrating resistance CBR. The main aim of this paper was to estimate the optimal...
Ground improvement as a result of stabilization with cement has its impact on soft soils such as sandy clay in engineering constructions. Stabilized soils are also used in foundation design, where improvement of mechanical properties is needed. Because of these reasons, knowledge of physical and mechanical properties is needed. The relationship stress – strain of soils stabilized with cement is often...
The study concerns the assessment of the traffic influence on the concentrations of three particulate matter (PM) fractions and their basic components. The PM samples were collected simultaneously at two receptors in Katowice. The measurement sites represented the so-called urban background and traffi c points. The contents of the organic and elementary carbon as well as water-soluble ions were determined...
The undrained shear strength (cu) is considered one of the most basic parameter characterizing soils in engineering practice. The particular importance of cu is in the case of clayey soil. This parameter also is the basis for the classifi cation of soil according to the ISO standard. The undrained shear strength usually is determined from unconfi ned compression test or from triaxial compression test...
The main aim of the research was to determine a susceptibility of a dried sludge to a rehydration increase. The paper presents the results of investigations for a sludge which had been dried to ca. 86% of dry mass and stored in an airy place under roof during 2.5 years. As well, trials were carried out for a completely dried sludge (0% of water), stored outside under roof as well as inside in a laboratory...
Mercury is a pollutant of global concern largely due to its potential for biological transformation into harmful forms and bioaccumulation through the food chains. Mercury is not able to biodegrade in the environment and it forms many toxic inorganic and organic complexes. The strongest harmful effects of mercury concerns the central nervous system. The harmful effects of mercury is very stable, because...
This study presents an application of the SWAT model (Soil and Water Assessment Tool) in an agricultural, coastal catchment situated in northern Poland, draining an area of 482 km2 (the Reda catchment). The main objective of this study was calibration and validation of the model against daily discharge and water quality parameters (bi-monthly total suspended solids [TSS], nitrate nitrogen [N-NO3]...
This research presents a method of creating seepage barriers in a sandy soil using biopolymer additives (biosubstance), which consist of polysaccharides and water. Polysaccharides strongly interact with water to produce a viscous suspension. The paper aims to investigate the infl uence of a biosubstance employed in a highly permeable sandy soil. Amount of the biopolymer used in a sample were 0.5,...
The paper presents the results of research on natural cohesive soil carried out in the Hollow Cylinder Apparatus (HCA). The main goal of this study was to determine the values of undrained shear strength at different angle of the rotation of principal stress directions. The research were carried out with anisotropic consolidation and shearing in undrained conditions (CAU) on cohesive soil with overconsolidation...
A huge development of technical infrastructure, including the construction of many high-rise buildings, roads, railroads and extension of subway lines, took place over the recent years in Poland. Therefore, numerous planned investment projects require geotechnical data documenting the variation of soil parameters found in the subsoil. The shear wave velocity is one of the most important input parameters...
This work uses the results of Post-registration Cultivar and Agricultural Experimentation conducted in 1999–2011 in Lower Silesia, on soils of very good and good wheat complex. The rape vegetation season was divided into five periods that approximately corresponded to the phenological phases of the plant, namely: September-November (from sowing to stemming the growing season in the autumn), December-March...
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