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The calculation of wave height, - length and - period changes which result from trans-formation by currents and bottom are needed when solving engineering problems of sea and river hydraulics. It is possible to carry to number of such problems also a problem of construction and operation of sea channels which has big economic value. Modern sea channels can have width several hundreds of meters and difference of depths on the way to the channel and on an axis of the channel twice and more. Therefore, in calcula-tio...

Excessive iron causes hygienic and technical defects in the supply of drinking and service water. Even small iron concentrations can cause excessive bacterial proliferation, which, from a hygienic point of view, adversely affects the properties of water, such as turbidity, color, taste. In the case of small water sources, it is not appropriate to use demanding technological assemblies. Adsorption to a suitable adsorption material is most commonly used for water treatment. Compared to synthetic zeolites, the afford...

The road and rail infrastructure together with the technical infrastructure is a determining factor of the present daylife of human society, function of cities and municipalities. With the internationally developing cooperation and business within the European countries, the number of transport constructions of the motorway character grows over the areas, where it is necessary to build from the technically operational reasons extensive flyovers or tunnel constructions. The number of these constructions must meet r...

Climate change and its impact on the environment is an urgent problem of the present time, causing hydrological changes and ecosystem change. As a result, formed ecosystem representing less valuable in economic terms, low productivity. Therefore, study of climate change is an important and urgent task. Global climate changes in the South part of Russia is reflected in the warming of the winter period and an increase in the amount of precipitation during the cold season. This paper analyzes the changes in meteorolo...

The land subsidence caused by underground mining results in land form transformations in the Silesian Upland, which is located in southern Poland. The aim of the research was to determine the role of subsidence basins as new sedimentary basins and local erosion bases. Detailed research was carried out in selected mining subsidence areas where most extensive and spectacular subsidence basins in the Silesian Upland have formed. As part of the field work, the geological structure of the area was examined and detailed...

The objective of the present study was to evaluate by means of chemical analyses the quality of water collected from fish pond Tataru, Calarasi County. The water samples were collected during May 2017 from five sampling points (A, B, C, D, E) from three depths (surface layer, half of maximum depth, maximum depth). The subjected parameters were pH, electrical conductivity (EC), total hardness (TH), chemical oxygen demand (COD), nitrate nitrogen N-NO3-, nitrite nitrogen N-NO2-, ammonium nitrogen N-NH4+, phosphate ph...

The outflow of inorganic fertilizers from arable land is one of the main sources of surface water pollution. The pollution can be reduced by precise dosing of inorganic fertilizers according to the momentary nutrition need of the cultivated crops. The exact dose of fertilizer can vary considerably from one area to another as the soil conditions can be very variable even in the scope of a single field. The spectral properties of cultivated crops can be used for the calculation of precise doses of fertilizer. In our...

Sustainable development has been conceived as a solution to the ecological crisis caused by the intense industrial exploitation of resources and the continuous degradation of the environment and seeks primarily to preserve the quality of the environment. Sustainable development also brings to the forefront a new set of values that will guide the future model of economic and social progress, values that focus on man and his present and future needs, the natural environment - protecting and preserving it, and mitiga...