Antoni Grzywna

COMPARISON OF DETEMINISTIC INTERPOLATION METHODS FOR THE ESTIMATION OF GROUNDWATER LEVEL

This paper compares two spatial interpolation techniques – Radial Basis Functions (RBF) and Inverse Distance Weighting (IDW) – with the goal of determining which method creates the best representation of reality for measured groundwater levels in catchment area. The study used the results of research and field observations from the year 2011, in Sosnowica (West Polesie). The data set consists of groundwater levels measured at 15 points in three series of tests. Surface generation was obtained for each method. The water prediction maps showed spatial variation in the groundwater level in the study area and they are quite different. RBF method resulted in a smoother map. The analysis of the methods of interpolation of analyzed data with the help of cross validation statistics and plots showed that Radial Basis Functions creates better representation of reality for measured groundwater levels.

The Effect of Adjustable Outflow on the Fluctuations in the Level of Surface and Ground Water

This paper aims to analyze the variability of the surface and ground water levels in Ambona peatlands. The depth at which the ground water table occurred was studied with reference to the adopted land drainage standards. The studies were carried out in 2009/10–2015/16 for natural and regulated water outflows. The analysis of annual total precipitation suggests that in the analyzed period some years were very wet (2009/10 and 2013/14), some were wet (2010/11, 2012/13 and 2015/16), one year was dry (2014/15) and one year was normal (2011/12). The 7-year average seasonal precipitation amounted to 598 mm, which was 71 mm higher than the average precipitation recorded in 30 years. The level of water in the river under adjustable outflow conditions ranged from 55 to 77 cm. The level of water under natural outflow ranged from 18 to 49 cm. In the area with adjustable outflow, the average draining depth was 47 cm. In the remaining area, not covered by the irrigation system, the draining depth was 64 cm. Additionally, the dynamics of variance in the water level under natural outflow conditions was clearly higher.

Using terrestrial laser scanning in inventorying of a hybrid constructed wetland system

The goal of this paper was to evaluate the possibility of using terrestrial laser scanning (TLS) for inventorying of a hybrid constructed wetland (CW) wastewater treatment plant. The object under study was a turtle-shaped system built in 2015 in Eastern Poland. Its main purpose is the treatment of wastewater from the Museum and Education Centre of Polesie National Park. The study showed that the CW system had been built in compliance with the technical documentation, as differences between values obtained from the object and those given in the design project (max. ± 20 cm for situation and ±5 cm for elevation) were within the range defined by the legislator. It was also shown that the results were sufficiently precise to be used for as-built surveying of the aboveground elements of the CW system. The TLS technique can also be employed to analyse quantitative changes in object geometry arising during long-term use (e.g. landmass slides or erosion), the identification of which can help in selecting the hot-spots at risk of damage and thus restore the object to its original state as well as prevent new changes.

Land cover changes in catchment areas of lakes situated in headwaters of the Tyśmienica River

Abstract The paper presents the history of land cover changes in the catchment area of lakes situated in the headwaters of the Tyśmienica River. The basis of the study were topographic maps in scale 1:50 000, from 1936 and 2014. We analyzed the quantitative aspect of these changes. The study was conducted in three natural lakes (Rogóźno, Krasne, Łukcze), and in one lake transformed into a storage reservoir (Krzczeń). The technical issues of georeferencing maps in the Geographic Information System (GIS) software are addressed first. In the landscape of Łęczna and Włodawa Lake District, to the end of the 19th century wetlands and bushes dominated. The first type of human pressure on this area was agriculture. Another type of pressure was recreation. In the catchment areas of studied lakes increased mainly the area of buildings and forests. Significantly increased also the length of roads and watercourses. Almost completely disappeared bushes and wastelands. In most of the analyzed basins, the area of wetlands and arable lands decreased. The probable cause of the changes in catchment use was decline in the water table, and thus overgrowing of meadows and wetlands.

Evaluation of the possibilities of using water-damming devices on the Tyśmienica River to build small hydropower plants

Abstract Hydropower plants in Poland currently use only 19% of the river’s energy potential. Development of hydropower is limited by environmental regulations as well as by economic grounds. From the environmental point of view, it is desirable to build small hydropower plants integrated into the local landscape. This paper presents results of the research aimed at estimating the amount of energy that could be produced in the case of small hydroelectric power plants on weirs existing on the Tyśmienica River. There is also a legal framework that should be adapted at hydropower development. It was calculated that the technical capacity of the small hydropower plants that could be built on 4 existing weirs, is 0.131 MW. These power plants could produce 786 MWh of electricity per year. The economic efficiency of this production is currently difficult to assess, because a new support system for renewable energy sources is currently being implemented, which will be a decisive factor for entrepreneurs. It should be borne in mind that potential investments will be made in protected areas within the Natura 2000 network, which may limit their constructing or impose the obligation to assess their impact on selected environmental elements. Location within the protective area does not eliminate such investments, especially when solutions with the least possible environmental impact are used.

THE TECHNICAL PARAMETRS AND ROAD NETWORK IN THE JAKUBOWICE KONINSKIE VILLAGE

Parameters of agricultural transport network are an important element that affects the operating costs of farms. The proper conditions of the road network, suitable density and the quality should provide a opportune and efficient transport between home farm and some of the parcels. The article presents an evaluation of the agricultural road network in the village of Jakubowice Koninskie in the Niemce commune. An inventory of the study area was conducted, and the road density index, road extension index, and technical parameters (the width of the roads and the type of their surface) were determined. When the area of the village of 638 hectares and a total length of roads 35.44 km the road density index was 55 m·ha-1. Due to the surface the largest share in the structure of length are dirt and concrete roads.

The changes of surface and ground water level on the effect of regulated outflow

Abstract This paper aims to analyze the variability of the levels of surface and ground water in the Ochożanka basin. The depth at which the ground water table occurred was studied with reference to the adopted land drainage standards. The studies were carried out in 2009/2010–2014/2015 for natural and regulated water outflows. The analysis of annual total precipitation in the analyzed period some years were very wet (2009/2010 and 2013/2014), some of them were wet (2010/2011, 2012/2013), one year was dry (2014/2015) and one year was normal (2011/2012). The six-year average seasonal precipitation amounted to 593 mm, which was 66 mm higher than average precipitation recorded in 30 years. Under regulated outflow conditions the level of water in the river ranged from 55 to 77 cm. The level of water under natural outflow ranged from 18 to 49 cm. In the area with regulated outflow the average ground water level was 47 cm. In the remaining area of drainage system ground water level was 67 cm. Also, the dynamics of variance in the water level under natural outflow conditions was clearly higher.

EVALUATION OF OPTIONS FOR ERECTING SMALL HYDROELECTRIC POWER PLANTS ON THE RIVER BYSTRZYCA PÓŁNOCNA

This paper contains an analysis of conditions for erecting small hydroelectric power plants on the selected river in Lublin Region. The analysis covers technical options of the location of the facilities and their energy potential split into theoretical and technical potential. In addition, it refers to the most important legislative acts governing water management, including environmental protection. According to the analysis, the technical potential of small hydroelectric power plants on the river Bystrzyca Północna is about 125.5 kW. Energy production capacity is limited by both hydrological conditions and the necessity to adapt to regulatory framework concerning nature and environment protection, superior functions of watercourses and their situation in agricultural land.

EFFECT OF ANTHROPOGENIC POLLUTANTS ON THE QUALITY OF SURFACE WATERS AND GROUNDWATERS IN THE CATCHMENT BASIN OF LAKE BIALSKIE

The work evaluates the effect of anthropogenic pollutants on the quality of water in Lake Bialskie (51o32’07” N 23o00’55” E) and its catchment basin. Samples of water were taken from the lake (4 sampling points) and from wells dug within the catchment basin. The quality of water was analysed in May, June, August and November 2015. In the wells only in single cases was the level of chemical pollution found to exceed drinking water standards. However, in all samples the standard content of manganese was exceeded. In waters from the lake the concentrations of total phosphorus, which can contribute to eutrophication were recorded above the standard level. Both in waters from the lake and from the well a large count of mesoand psychrophiles and Coli and faecal coliforms as well as faecal Enterococci was found, which points to a high degree of contamination of the analysed waters with anthropogenic faeces. The phenomenon was observed to intensify in summer months, which can be associated with increased tourist traffic around the lake in this period.

ZMIANY WARUNKÓW WODNYCH W ZLEWNI RZEKI TYŚMIENICY

The paper presents the history of water conditions in the catchment area of the river Tyśmienica. On the basis of topographic maps in scale 1 : 100 00