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The numerical modelling of groundwater flow and pollutant infiltration was analyzed for the old sanitary landfill surrounded by a vertical bentonite barrier. The re-circulation system of leachate applied on the landfill was also analysed in transport modelling. The FEMWATER numerical program was used for the modelling. The aim o f modelling was assessment o f the vertical bentonite barrier influence...
Calculation methods of discharge capacity in rivers and channels with flexible vegetation are based at the Manning’s and Darcy-Weisbach’s friction factors to appear local river bed stresses coupled with other fluid dynamic processes. An example of friction factors calculation has been developed in this paper. The hydrometrical measurement has been surveyred in a selected cross section in the Lower...
A new mathematical model has been proposed to describe the growth of world population - see formula (2). The coefficients of this model have determined by fit measure (3). Applying the regression function (4) one can obtain more exact world population projection on the years 1986-2003 - see tables 1, 2 and 3.
Acute toxicity of two pesticides (organophosphorous insecticide and fungicide from sulfamid group) on Daphnia magna was studied in this experiment. Mortality of examined organisms in different concentrations of these active substances was defined. The value of lethal concentration (LC50) was calculated using probit method based on the observation results. The results have shown that after 6-hour exposure...
The paper discusses issues of iron and manganese removal from underground waters in the filtration process. The results of laboratory-scale tests of the process with filtration beds filled with catalytic mass are presented. Problems involved in operating of several underground water treatment stations using said mass in the South-Eastern Poland were also discussed.
Nonlinear differential equations (hyperbolic type) was applied to describe the optimalization approach of basin irrigation system. The proper boundary conditions were assumed. The water flow in dry penncable subsoil was determined. The calculation results for embankment canals agree well with observations.
Environmental aspects of engineering activity has received in the last decades much more attention. Severe requirements concerning environmental protection results in increased interest in evaluation of geotechnical parameters of man made soils. To fulfill this requirement, laboratory test programme was undertaken ainred at evaluation of permeability of man made material represented by coal ash -...
In the publication the characteristics of Polish agrotourism has been presented as well as the userof service has been described form statistic point of view. New possible areas of cooperation between spas and agrotourism farms, which are localized in spas surroundings, have been proposed in the field of food, recreational and haliday services, taking into account thee rule of balanced development.
The paper presents the stability analysis of old large landfills of embankment type, localised nearby Warsaw, i.e. Radiowo. The reinforcement solytions applied on the landfill body as well as influence of leachote level in waste body were taken into account in stability analysis. The reiforcement method consist of retaining wall, berms, geogrids and tyre mattreses. The paper also presents shear strength...
The aim of the paper is qualification of conformability between actual soil moisture appointed in laboratory and indexes of soil moisture used in hydrology. Lambor's anterior precipitation index (IL) and American index (Ia). The qualification was perfomed for soil with granulation as in loamy sand. The notation for soil moisture is taken from model experiments conducted in Department of Agronomy experimental...
Making a twenty-four hours and a max flows is necessary in projects of water supply system. Forecasting a water consumption on agricultural requirements is difficult. This research specify an inequality water consumption ratio on fruits farms in Poland. Analysis of production technology on farm determined a proposition of peak day and peak hour factors.
In the paper the tests results of the consolidation coefficient (cv) of unsaturated pliocen clays are presented. The consolidation tests of pliocen clay samples were performed for different values of loading and degree of saturation induced by applied suction. These tests were carried out in the suction controlled consolidometer (called UPC-consolidometer), which uses the “axis-translation” technique...
The aim of the paper is to analyze relationship between winter wheat yield and selected indexes of precipitation and soil moisture conditions and consequently the attempt of estimation optimum precipitation condidons for the yield. Six meteorological stations and related to them phonological stations have been the source of long-term meteorological, phenological and winter wheat yield data.The stations...
It was found that the development of Ursynów in 1980-2000 as well as University campus in the period 2000-2004 showed occurence gradually increase amount of precipitation at Ursynów station SGGW - in comporison with Okęcie (airport). Increase in precipitation trends upwards about 60% of total annual precipitation and it is less than whole recives in literature (a dozen percentage). It may be caused...
The correct analysis requires the schedule of the realization of the project to carry the analysis of resources out. The method of defining and lead of counts or network schedules with resources limited in conditions was given in the article on the basis of the Pertmaster Professional + Risk application. The method of determining the list resources, the chance to define data about every resource and...
The results of soil heat flux density measurement using flux plates are as a rule burdened with substantial errors. Therefore, the verification of heat flux plate data is necessary it may be performed by comparing these data to obtained by the other method, recognised a control. In this paper, there is examined the relation between the values of soil heat flux density from plates burried at the depth...
The paper presents feasible solutions concerning removing and neutralising wastewaters produced in rural areas. When analysing the sewage systems used for rural districts, one must consider the sewerage networks independently from treatment plants, household sewage treatment plants or, for instance, sewage tanks (emptied cesspools). One has also to consider principles used for selecting sewage systems...
The environmental damage resulting from Iraq invasion on Kuwait and subsequent war (1990-1991) has affected all ecosystems and human health in the region. The military troop movements, trenches, mine fields and hight level of oil contamination destroyed large areas of desert topsoil. Analysis of influence of war activities on natural environment shows, that destruction of oil shafts had the most serious...
In saturated clay soils with Iow values of hydraulic gradients and hydraulic conductivity lower than 1·10-9 m/s (geological barrier) the most important effect on the migration of leachate from landftlls has diffusion process. Therefore, prediction of contaminants migration should include both advection and diffusion models. The paper deals with application of the POLUTEv6 program for numerical analyzes...
The goal of the paper was to investigate role of water bodies for the residents of Cracow, in particular the role of lakes and ponds in the rural areas near Cracow. To achieve this a questionnaire involving 746 Cracow residents above the age of 15 was carried out. It proved that alm ost 78% Cracow residents use water bodies for reereation. The highest number (55%) of the ones resting on water visit...
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