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Aim of the study Indication of directions and pace of changes in ice regime of Jagodne Lake in 1975–2015. An analysis of predictability of ice phenomena in relation to stability and seasonality and an understanding mutual interactions between parameters describing ice regime of the lake. Material and methods Data from the Jagodne Małe water gauge station on Jagodne Lake, concerning: the dates of the...
Aim of the paper is to present the results studying the water hammer phenomenon in pipes made of different materials, and to show the impact of changing the type of material of the pipe on the velocity of the pressure wave during the transient flow in the pipes. In terms of research material and methods, pipes made of galvanized steel and high-density polyethylene were tested. Measurements were made...
Aim of the study Aim of the paper was to use the Rembrandt multi-criteria decision support method to select the best type of fish pass for the analysed barrage, depending on the priorities adopted. Material and methods Hydraulic structures interrupt the continuity of morphological and biological watercourse, divide it into sections, which cannot be crossed by fish and other aquatic organisms. It is...
Aim of the study Recently, the use of acoustic Doppler current profilers (ADCP) gains in popularity. Considering the use of various equipment, a question arises whether there are any differences in measuring with ADCP that works at different frequencies. The aim of this study was to compare and evaluate three ADCPs operating at different frequencies: 2,000 kHz, 1,500 kHz, and 600 kHz under field conditions...
Aim of the study This paper aims to present an integrated assessment of changes in a mountain river valley after a flood. Material and methods The assessment followed the LandScape & HydroMorphological Assessment of River Valleys Method (LSHM Method). The method is intended for assessing and identifying valuable areas in river valleys and determining their development potential. The LSHM Method...
Aim of the study The paper presents calculations of filtration through a side dam of the “Maziarnia” water reservoir in Wilcza Wola in the Podkarpackie Voivodeship. Material and methods In the selected sections, on the basis of penetration drilling and research excavations, the geotechnical structure of the dam body and base was identified and samples for laboratory tests were taken. The results of...
Aim of the study The paper presents the results of hydraulic calculations (numerical simulations), which were conducted in order to investigate the role of floodplain (polder) adjacent to the left bank of Cisowska Struga in Gdynia downstream of Hutnicza street in the process of retention and transformation of flood waves occurring in this river due to heavy rainfall. The paper also addresses the issue...
Aim of the study This study analyses the efficiency of flood protection in a small urban catchment, based on a system of small reservoirs. Material and methods To assess the flood routing and surge reduction, a mathematical model of the river catchment was implemented. This was a lumped hydrological model, based on the SCS-CN method. Channel routing was performed, using kinematic wave equation. The...
Aim of the paper The aim of the paper is to answer a question regarding the possibility of using a modern system of real estate cadastre, which as an interoperable spatial database could carry out tasks in the field of public safety Material and methods In Poland there is a legal obligation to register history, which gives an opportunity to create a 3D + cadastre. This article presents a method of...
Aim of research The aim of this research was to analyse an influence of check dams on granulometry of bed sediments in their impact area. Necessary data was obtained during field measurements carried out in May 2017. Sediment was collected using the Wolman’s method. Data collected through this method were used to determine granulometric curves, granulometric parameters and shapes of grains forming...
Aim of the study The article presents an algorithm for calculating the distribution of flow in a junction of open channel network under steady flow conditions. Material and methods The presented algorithm is based on the continuity equation and a simplified energy equation. To describe the relationship between the depth of water and the flow rate, the Manning’s equation was used to express discharge...
Research aims The aim of the conducted research was to assess efficiency of sewage treatment in rural areas in a sewage treatment plant with a sequencing batch reactor (SBR). Materials and methods Assessment of effectiveness of wastewater disposal in a treatment plant was carried out using elements of reliability theory. Research covered a period from March 2014 to December 2015. The content of pollution...
Aim of the study This paper presents a verification of peak discharges (maximum flow) of the great flood that took place in July 1997 on the Odra (Oder) river, for the section between Racibórz and Słubice. Material and methods The carried out analysis included a review of hydrological and morphological data, GIS analysis, extensive hydrodynamic two-dimensional modelling, and determination of rating...
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