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The area under study in this paper was subject to landscape transformations, including changes in hydrographical networks. These changes were especially intense in the second half of the 19th century during the Prussian partition, when extensive hydrotechnical works were conducted. Based on a comparison of cartographic materials at a scale of 1:25,000, Prussian topographic maps from 1874, and Polish maps from the second half of the 20th century, it was found that the hydrographic network has changed significantly. A characteristic anthropogenic pattern of water structures was observed that correlates with certain individual morphological units. In the bottoms of the valleys and hollows there is a dense irrigation network, and in the moraine areas, numerous reservoirs of anthropogenic origin were found that are characterized by a rather small size and circular shape. The drainage density in the area under study has increased from 0.7 to 1.95 km·km⁻², but the lake percentage has only increased from 1.81 to 1.93%. However, the number of reservoirs has increased from 36 to 675. The anthropogenic water reservoirs were found first and foremost in the area of the uplands, where the reservoir frequency has increased from 0.3 km·km⁻² to 7.7 km·km⁻². The results of the conducted research can be used to perform an automatic analysis of the transformations of the water network in Tuchola Forest and other areas of the last glacial extent. The results of the study presented in this paper should also be used when taking any decisions and actions that may lead to changes in water network and water management. The discussed “anthropogenic lakeland” located in the area of poor industrial and urban development, the Tuchola Forest, may also be the premise for verifying views on a large number of lakes situated in kettle holes within the Polish Lowland (Niż Polski).
This article presents hydrological aspects of a renaturization plan for a river valley that has been significantly transformed as a result of human impact. A section of the Szarlejka River valley located at the border of the cities of Bytom and Radzionków was used for this purpose. The hydrographic conditions of the area under consideration have been significantly altered due to human action. These transformations are the result of systematic residential and industrial infrastructure development, which has been accompanied by industrial waste disposal. Underground coal mining in the area has caused subsidence and discharge of saline mining waters to rivers. The Szarlejka is considered one of the most polluted rivers in Silesia Province (Polish: województwo śląskie) and all of Poland. The primary objective of the renaturization plan is to improve abiotic conditions and water status. This plan is based on the analysis of all accessible data, including archival maps and field work. Hydrological and hydrotechnical renaturization actions are proposed for the Szarlejka River valley that cover the elements, structures, and facilities, of which the mere presence brings the waters closer to their natural state (barrages inhibiting erosion, connections allowing for the circulation of aquatic organisms). The proposal also includes building astatic reservoirs, creating oxbow tanks in retained sections of the old river bed, and building a pond with a wetland and an island. The restored structures will affect abiotic and biotic conditions, consequently influencing the water recovery process with the aim of bringing it closer to its natural state. For the purposes of the planned renaturization, a geographic information system (GIS) was created, enabling digital map generation, database creation, and calculations.
This paper to assesses the impact of air temperature increase connected with the degree of anthropogenic transformation of an area on the subjectively perceived quality of life. The area under study is the Metropolitan Association of Upper Silesia (Górnośląski Związek Metropolitalny – GZM. We analyzed the average monthly temperatures in different seasons and the human impact ratio of the area. The ratio was determined based on population density, road network density, the amount of waste produced and the number and size of buildings in the analyzed area. The result is a methodology that involves anthropogenic and non-anthropogenic factors to assess the impact of weather conditions on the quality of life in the analyzed area. The average temperatures in GZM have a similar spatial distribution pattern regardless of the season. The highest temperatures are recorded in the central part of GZM. The spatial fluctuations of the human impact factor are large in the area studied, with values varying from 2.5 to 10.1. These values points to the risk of exposure to harmful factors and a lower quality of life perception. As evidenced by the human impact factor calculated, these are the districts where human influence on the environment is the most noticeable. After analysis of temperature distribution the similarities in the distribution patterns of both factors are evident Therefore, temperature should also be taken into account when identifying sites particularly harmful to human health.
Agricultural activity results in water pollution from nitrogen and phosphorus compounds. Increased concentrations of nitrogen compounds pose a threat to animal and human health. The purpose of this study was to determine the impact of agriculture in a catchment basin on the level of surface water pollution from biogenic compounds. Spatial analysis of the land cover was conducted using GIS and was based on data from the Corine Land Cover databases. The study results indicated that high concentrations of nitrogen and phosphorus compounds existed in the surface waters. In the surface water, high concentrations of biogenic compounds occurred in both primarily agricultural catchments and in urbanized drainage areas. Water may be regarded as eutrophicated or at high risk of eutrophication because the majority of the nitrate concentrations at the monitoring sites exceeded a limit of 10 mg·dm⁻³ NO₃²⁻. Inadequate farming practices and poor sanitary conditions on farmsteads result in the leaching of biogenic substances into the water. To protect water from biogenic pollutants, it is necessary to adopt a new approach to fertilizer use and to improve the sanitary conditions of agricultural properties, which can be achieved by, among other things, the installation of drainage systems in rural areas. Our recommendations include the protection of river valleys as follows: by stopping deforestation, by preserving natural riparian vegetation, and by reducing the volume of intensified agricultural activity or introducing so-called “precision farming.”
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