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The linear regression eąuations describing relation of soil heat flux density values in daily course derived from the indirect (combined) method and flux-plates were used for correction of heat flux plate data on a given day. In the case the gaps occur in comparative materials (i.e. from indirect method), the correction problem of heat flux plate data in the multiday series of measures may be solved...
Products of oil refinement and edible oils are main sources of pollution of natural environment. They also disrupt proper functioning of sewage systems and biological components of sewage treating plants. Diatomite and clinoptilolite are effective sorbents in removing oil contaminations from hard surfaces. This fact served as a prompt to research chalcedonite’s properties in this field. The research...
The paper presents the results of research on selected parameters characterising the quality of water in the Długa River. Analysed indicators testify about pollutions from communal sources. Greatest influence on quality of water in Długa river have refineries of sewage treatment plants.
This paper presents the method of permeability coefficient evaluation based on laboratory tests. In Iaboratory investigations the flow-pump technique has been chosen. In this method the constant discharge capacity of water flow in the soil was applied. The results obtained from flow-pump investigation performed on peat samples indicates non-linear relationships between permeability coefficient and...
High cost of water purchase from municipal water providers favors a steadily growing interest in possibilities of precipitation water catching and utilizing. Results of the analysis of operation of a system of precipitation water use for toilet flushing, based on specially developed simulation model and meteorological data, is presented. Critical assessment of economic effects attainable due to such...
The transport processes in rivers in many cases can be represented by depth-averaged, two-dimensional advection-diffusion equation. The equation with general boundary and initial conditions does not have an exact analytical solution, and therefore problem requires numerieal methods. It is important to choose an algorithm, which is accurate, stable and fast. The Altemating Direction Implicit method...
Paper presented analysis results of investigations of model on formation of scour in time. Investigations were conducted on model taired constructions with the over of water under the closure, bottom of water basins and washing-out area. Model were made in scale 1 : 30. In inwestigations were used as eroded material - sand (d50=1,1 mm). For modelling hydraulic parameters of flow on model were used...
Irrigation management with low quality water should take into account a water balance as well as nutrient balance. Paper presents an algorithm of irrigation management. This algorytm connects water and nitrogen balance. Water balance includes: precipitation, irrigation, evapotranspiration and effluent. Nitrogen balanse consists of nitrogen from precipitation or irrigation water and fertilization as...
This paper presents different scenarios and their effect on the biodiversity of the two Natura 2000 areas included in the study area of VEDI project. These generał scenarios formed the basis of detailed landscape designs, based on a detailed vegetation map for the Vistula River Valley. Indicator species relevant for conservation were selected to represent specific riverine ecosystems like step banks,...
Characteristic o f precipitation conditions of two experimental stations Bałcyny and Tomaszkowo of Warmia Mazury University in Olsztyn is presented in the paper. Analysis was made on the base of daily sum of precipitation during 1996-2005 period. Frequency of months and seasons with deficit or excess of precipitation according to Kaczorowska’s criterion, frequency of non-precipitation day sequences...
Subsequence of weather elements was estimated using linear correlation method. For analyzes, the five weather elements were take under consideration: mean monthly temperature, extreme monthly temperatures (min and max), monthly sums of precipitation, as well as thermal weather seasons duration. The best correlation occurred between average temperatures of winter’s months. Only a few causes proved...
In order to determine physical and sorptive parameters of reactive materials at the Department of Geotechnical Engineering, Warsaw Agricultural University, the experiments were performed using AWK 3D System (Karnika, Poland) and ASAP 2010 V4.00 apparatus (Micromeritics, Norcross, GA, USA). In this paper, a hydraulic-sorption-desorption model of permeable sorption barriers, and test results for Ukrainian...
In recent years the investigations were carried out to obtaine the reliable stress-strain relationships in the cohesive soil, especially at the elastic range. The paper presents the advanced methods and devices using in measurement of shear waves velocity to estimate the shear modulus. A combination of field and laboratory tests was used to characterise the behaviour of a Pliocene overconsolidated...
This paper presents an analysis of the relationship between the traffic emissions concentration and the traffic flow changes measured in the cross-section of one of the thoroughfares in Warsaw (Poland). The changes in meteorological conditions were also taken into account. The habitation in the vicinity of communication arteries with a substantial traffic flow, causes the more significant exposure...
Contemporary rules o f controlling rivers suggest leaving vegetation on the floodplains for the sake of its environmental functions. After years of constructing channels with simple geometry and free of obstruction, like floodplain vegetation, the trend to promote restoration of river valleys appeared. Due to the problem s with natural re-shaping of already canalised rivers along their whole lengths,...
Construction of structures on soft organic soils gives rise to special problems. The most obvious ones are large deformations that may occur during and after the construction period, both vertically and horizontally. The settlements often appear quickly but may also continue for very long time periods due to secondary compression. In this paper the results of laboratory tests of peat and calcareous...
The aim o f the studies was to characterize time structure of the real sunshine totals in the Szczecin Lowlands and frequency and variability of number of hours with the sun lasting > 4, > 6 and > 10 h in 2000-2004. The largest daily real sunshine total in the Szczecin Lowlands amounting to 6.6 hours occurs in the first ten days of May, whereas the lowest one, 0.8 h, in the third ten day...
Irrespective of the epoch man has always aimed at ensuring himself and his family a safe shelter, which is an apartm ent building. Review of the building industry history shows how used building materials affect its development. They affect the construction of buildings, dimensions, shape and architectonic form of a building. Results of field investigations relating to building materials solutions...
The paper presents arrangement of farmsteads which also fulfil agricultural, living and agrotouristic function. Exemples of the farmsteads show their strengths and weaknesses as a recreation and holiday area. There were theoretical models of functional system and four types of farmsteads arrangements presented.
The paper presents analysis of factors that subject a value o f Young's m odulus of cohesive soils. This parameter is indispensable in a design process of all soil structures and any engineering structure founded on soil. According to Polish practice expressed in Polish Standard PN-81/B-03020, value of Young’s modulus is uniquely related to soil kind and liquidity index. The paper presents considerably...
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