Autor: Walczak, J. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: The Use of AHP Method for the Determination of the Most Environmentally Beneficial Variants of Barrages
Autorzy:: Kubicz, J.
Hämmerling, M.
Walczak, N.
Powiązania:: https://bibliotekanauki.pl/articles/123314.pdf
Data publikacji:: 2015
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: AHP method
environmental impact evaluation
hydraulic structure
Opis:: This study presents an attempt to apply the AHP (Analytic Hierarchy Process) method for the determination of the most beneficial concept of development of a barrage. The main focus of the analysis was the influence of the civil engineering structure on various elements of the environment. The AHP method was applied to analyse the influence of specific scenarios on environmental elements and on the overall objective. Basing on the analysis, local and global priorities were determined for individual elements of the created decision tree, which allowed us to select the most beneficial scenario. The scenarios referred to the existing hydraulic structures located on the rivers Głomia, Gwda and Prosna. In order to verify the obtained results, calculations of the consistency of the importance evaluations for specific criteria were performed.
Źródło:: Journal of Ecological Engineering; 2015, 16, 4; 36-43
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: The Influence of the Selected Turbulence Model and Grid Density Degree on the Results of Velocity Distribution Obtained with the Use of the Simulation Program SSIIM
Autorzy:: Hammerling, M.
Walczak, N.
Nieć, J.
Powiązania:: https://bibliotekanauki.pl/articles/124009.pdf
Data publikacji:: 2018
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: velocity distribution
turbulence model
mathematical modelling
sill
Opis:: This paper analyzed the water flow parameters in the local scour created after building stones sills No 3 km 480 + 902 and 4 km 479 + 225 below the Jeziorsko reservoir on the river Warta. The analysis was carried out using the result of field measurements (velocity distributions) and SSIIM (freeware) software. The study of the geometry of the local scour, were used to create a numerical model and implementing it to the SSIIM software. In the research, the impact of grid density on the obtained results was estimated. The results included the qualitative and quantitative assessment. The conducted analysis can be used to determine the movement of sediment in local scour, and can predict the development in time, and also specify the sill stability under different conditions of the water flow.
Źródło:: Journal of Ecological Engineering; 2018, 19, 3; 106-114
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: The Influence of the Presence of Vegetations in Floodplains on Flood Risks
Autorzy:: Walczak, N.
Hammerling, M.
Spychała, M.
Nieć, J.
Powiązania:: https://bibliotekanauki.pl/articles/123654.pdf
Data publikacji:: 2015
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: flood area
flow velocity
resistance coefficient
roughness coefficient
vegetation
Opis:: The movement of water on flood areas depends mainly on the geometric parameters of vegetation, which as a dynamic factor causes a high changeability of flow conditions during the year. The actual ecological trend, whereby there is a tendency to leave the plants in the floodplain, imposes the necessity on engineers to develop accurate methods of determining the effect of vegetation on what used to be once a commonly occurring flood risk. According to the report on national security risk, elaborated by the Government Security Centre, flooding is the most common such risk. This is most likely to occur among all the risks included in the National Crisis Management Plan and brings the greatest number of negative effects. In order to mitigate the negative phenomena related to floodplains, the methodology and calculation of the average flows, using the Maninng and Darcy-Weisbach models is presented.
Źródło:: Journal of Ecological Engineering; 2015, 16, 5; 160-167
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Colloids in Septic Tank Effluent and Their Influence on Filter Permeability
Autorzy:: Spychała, M.
Nieć, J.
Walczak, N.
Marciniak, A.
Powiązania:: https://bibliotekanauki.pl/articles/952414.pdf
Data publikacji:: 2015
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: colloids
clogging
hydraulic conductivity
nonwoven textile
turbidity
Opis:: The aim of the study was to evaluate the content of colloids in septic tank effluent and their impact on textile filter permeability. Measurements were performed on septic tank effluent without suspended solids but containing colloids and without colloids – including only dissolved substances (filtered by micro-filters and centrifuged). The study was conducted on unclogged and clogged textile filter coupons. During the study the following measurements were conducted: turbidity, chemical oxygen demand and hydraulic conductivity of textile filter coupons. The colloid size range was assumed to be less than 1.2 microns according to the literature. Despite the relatively low content in the septic tank effluent the colloids played an important role in the clogging process. Both the filtering media, filled with low (unclogged) and high content of biomass (clogged) were sensitive to the clogging process acceleration due to the possibility of small diameter pore closure and oxygen access termination. Moreover, small size pores were probably sensitive to closing or bridging by small size colloidal particles.
Źródło:: Journal of Ecological Engineering; 2015, 16, 4; 74-80
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Bonitation Analysis of Turf on City Stadium in Wroclaw in the Season of Euro 2012
Autorzy:: Wolski, K.
Janik, G.
Czarnecki, J.
Ziarko, J.
Talar-Krasa, M
Walczak, A.
Biernacik, M.
Dawid, M.
Powiązania:: https://bibliotekanauki.pl/articles/952401.pdf
Data publikacji:: 2016
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: sports turf
bonitation analysis
general aspect
colour
sodding
susceptibility to disease
winter survival
Opis:: In 2012–2013, a study was conducted, consisting in a bonitation analysis of turf on the City Stadium which is located in the north-west part of Wroclaw and was a sport arena of the European Championships Euro 2012. The experiment was made with the complete randomisation method for 2 factors, on 5 dates in the growing season. On the turf of the pitch 12 points were selected, and at each of them an evaluation of utility features was performed, in 4 replications, on surface area of 1 m2 . Based on the observation of the condition of the turf, during subsequent analyses it was found how the selection of the mixture of grasses, intensity of use and pratotechnic treatments affect the bonitation quality of sport turfgrass. The results are shown in relation to the whole object, separating each of the features under analysis.
Źródło:: Journal of Ecological Engineering; 2016, 17, 4; 311-320
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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