Pub Date : 2019-01-01DOI: 10.15576/ASP.FC/2018.17.1.125
A. Kukulska, T. Salata, K. Cegielska, M. Szylar
Geographical Information Systems (GIS) has revolutionised the process of collecting and processing data, therefore, more and more data recorded in an analogue form are transformed into the digital format. However, the process of generating vector models poses a risk of appearing defects of different types. A methodology of correcting common geometric and topological errors that appear in the manual vectorization of a raster model was presented in the paper. The research material was the vector layer including the digitized version of several dozens of drawings of spatial development plans. The paper also presents a procedure for creating a vector model of spatial data with attention paid to potential sources of errors which could be incurred at the stage of its creation as well as indicates methods for their prevention. The tools and plug-ins for evaluation and revision of geometric and topological correctness of a vector model implemented in QGIS software were mainly used in the survey. Elaborated algorithms are aimed at acceleration of data processing to allow their usage during that process. Indeed, proper conducting of spatial analyses needs to administer a data set which is free of errors. Only then, is it possible to obtain proper results and draw appropriate conclusions.
{"title":"METHODOLOGY OF EVALUATION AND CORRECTION OF GEOMETRIC DATA TOPOLOGY IN QGIS SOFTWARE","authors":"A. Kukulska, T. Salata, K. Cegielska, M. Szylar","doi":"10.15576/ASP.FC/2018.17.1.125","DOIUrl":"https://doi.org/10.15576/ASP.FC/2018.17.1.125","url":null,"abstract":"Geographical Information Systems (GIS) has revolutionised the process of collecting and processing data, therefore, more and more data recorded in an analogue form are transformed into the digital format. However, the process of generating vector models poses a risk of appearing defects of different types. A methodology of correcting common geometric and topological errors that appear in the manual vectorization of a raster model was presented in the paper. The research material was the vector layer including the digitized version of several dozens of drawings of spatial development plans. The paper also presents a procedure for creating a vector model of spatial data with attention paid to potential sources of errors which could be incurred at the stage of its creation as well as indicates methods for their prevention. The tools and plug-ins for evaluation and revision of geometric and topological correctness of a vector model implemented in QGIS software were mainly used in the survey. Elaborated algorithms are aimed at acceleration of data processing to allow their usage during that process. Indeed, proper conducting of spatial analyses needs to administer a data set which is free of errors. Only then, is it possible to obtain proper results and draw appropriate conclusions.","PeriodicalId":51904,"journal":{"name":"Acta Scientiarum Polonorum-Formatio Circumiectus","volume":"57 1","pages":""},"PeriodicalIF":0.4,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84190237","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-01-01DOI: 10.15576/asp.fc/2018.17.1.139
L. Lewicki, Grzegorz Pyrczak
The reservoir complex in Zesławice on the Dłubnia River belongs to the Cracow agglomeration. It is located near built-up areas, which reduces the available flood reserve capacity and at the same time protects these areas. The experience of the flood in 2010 confirmed that this level is not sufficient, though. The main objective of this study is to evaluate the flood protection effectiveness of the Zesławice reservoir complex by estimating the maximum flood level, which can be effectively reduced. Numerical calculations were performed on a 1-D computer model of the Dłubnia River with the MIKE 11 software (by DHI). Due to the complexity of topographical arrangement of the Zesławice reservoirs, each one was modeled as a separate 1-D object. The hydraulic connections between them were defined and the rules controlling the outflow were modeled. In addition, the evaluation of the Dłubnia riverbed capacity downstream of Zesławice was performed and a general guidelines how to increase the level of flood prevention in the impact area of the reservoirs were formulated.
{"title":"ASSESSMENT OF FLOOD PREVENTION EFFICIENCY OF THE RESERVOIR COMPLEX IN ZESŁAWICE ON THE DŁUBNIA RIVER","authors":"L. Lewicki, Grzegorz Pyrczak","doi":"10.15576/asp.fc/2018.17.1.139","DOIUrl":"https://doi.org/10.15576/asp.fc/2018.17.1.139","url":null,"abstract":"The reservoir complex in Zesławice on the Dłubnia River belongs to the Cracow agglomeration. It is located near built-up areas, which reduces the available flood reserve capacity and at the same time protects these areas. The experience of the flood in 2010 confirmed that this level is not sufficient, though. The main objective of this study is to evaluate the flood protection effectiveness of the Zesławice reservoir complex by estimating the maximum flood level, which can be effectively reduced. Numerical calculations were performed on a 1-D computer model of the Dłubnia River with the MIKE 11 software (by DHI). Due to the complexity of topographical arrangement of the Zesławice reservoirs, each one was modeled as a separate 1-D object. The hydraulic connections between them were defined and the rules controlling the outflow were modeled. In addition, the evaluation of the Dłubnia riverbed capacity downstream of Zesławice was performed and a general guidelines how to increase the level of flood prevention in the impact area of the reservoirs were formulated.","PeriodicalId":51904,"journal":{"name":"Acta Scientiarum Polonorum-Formatio Circumiectus","volume":"19 1","pages":""},"PeriodicalIF":0.4,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90704461","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-01-01DOI: 10.15576/asp.fc/2018.18.2.3
R. Banasiak
Aim of the study Analysis of flood water flow through the Wrocław City Centre Hydrosystem before and after its modernisation. Material and methods Use of the MIKE21 numerical 2D hydrodynamic model supported by GIS tools. Use of historical floods hydrometrical data. Results and conclusions Chosen hydraulic characteristics were presented, including the distribution of water flow in channels of the hydrosystem and water table profiles for both variants with an evaluation of the investment’s influence. Maximum flow in the city section of the Odra river during the 1997 flood was verified.
{"title":"HYDRODYNAMIC 2D MODEL OF THE CITY CENTRE HYDROSYSTEM OF THE CITY OF WROCŁAW AND ITS FLOOD CAPACITY ANALYSIS","authors":"R. Banasiak","doi":"10.15576/asp.fc/2018.18.2.3","DOIUrl":"https://doi.org/10.15576/asp.fc/2018.18.2.3","url":null,"abstract":"Aim of the study Analysis of flood water flow through the Wrocław City Centre Hydrosystem before and after its modernisation. Material and methods Use of the MIKE21 numerical 2D hydrodynamic model supported by GIS tools. Use of historical floods hydrometrical data. Results and conclusions Chosen hydraulic characteristics were presented, including the distribution of water flow in channels of the hydrosystem and water table profiles for both variants with an evaluation of the investment’s influence. Maximum flow in the city section of the Odra river during the 1997 flood was verified.","PeriodicalId":51904,"journal":{"name":"Acta Scientiarum Polonorum-Formatio Circumiectus","volume":"18 1","pages":""},"PeriodicalIF":0.4,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74576126","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-01-01DOI: 10.15576/ASP.FC/2018.17.1.19
Marek Kalenik, M. Malarski
The paper presents an analysis of the tests of an airlift pump that has pumped water Qw or a mixture of water with sand Qw + Qs. The research included a determination of performance and efficiency characteristics for an airlift pump with internal diameter of the discharge pipeline d = 0.04 m equipped with a PM 50 air mixer with perforated rubber diaphragm. The tests were carried out for three lifting heights of water and a mixture of water and sand H: 0.40, 0.80, 1.20 m, with a fixed length of the discharge pipeline submergence h = 0.80 m. It was found that water flow rate Qw and the mixture of water Qw with sand Qs flow rate increased with the growth of the airflow rate Qp, reaching maximum and then decreasing. Whereas with the rise of lifting height of water or the mixture of water with sand H, the water Qw and the mixture of water Qw with sand Qs flow rate decreased. It has been shown that the airflow rate in this type of installation during the discharge of the water cannot be less than 5,0 m3 · h–1 and should not exceed 16,0 m3 · h–1. When the mixture of water with sand is discharged, airflow also cannot be less than 9.80 m3 · h–1 and should not exceed 17.0 m3 · h–1. The airlift pump efficiency η decreased with a rise of mixture of water with sand lifting height.
{"title":"PERFORMANCE TESTS OF AN AIRLIFT PUMP EQUIPPED WITH A PERFORATED RUBBER DIAPHRAGM MIXER","authors":"Marek Kalenik, M. Malarski","doi":"10.15576/ASP.FC/2018.17.1.19","DOIUrl":"https://doi.org/10.15576/ASP.FC/2018.17.1.19","url":null,"abstract":"The paper presents an analysis of the tests of an airlift pump that has pumped water Qw or a mixture of water with sand Qw + Qs. The research included a determination of performance and efficiency characteristics for an airlift pump with internal diameter of the discharge pipeline d = 0.04 m equipped with a PM 50 air mixer with perforated rubber diaphragm. The tests were carried out for three lifting heights of water and a mixture of water and sand H: 0.40, 0.80, 1.20 m, with a fixed length of the discharge pipeline submergence h = 0.80 m. It was found that water flow rate Qw and the mixture of water Qw with sand Qs flow rate increased with the growth of the airflow rate Qp, reaching maximum and then decreasing. Whereas with the rise of lifting height of water or the mixture of water with sand H, the water Qw and the mixture of water Qw with sand Qs flow rate decreased. It has been shown that the airflow rate in this type of installation during the discharge of the water cannot be less than 5,0 m3 · h–1 and should not exceed 16,0 m3 · h–1. When the mixture of water with sand is discharged, airflow also cannot be less than 9.80 m3 · h–1 and should not exceed 17.0 m3 · h–1. The airlift pump efficiency η decreased with a rise of mixture of water with sand lifting height.","PeriodicalId":51904,"journal":{"name":"Acta Scientiarum Polonorum-Formatio Circumiectus","volume":"50 1","pages":""},"PeriodicalIF":0.4,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73568095","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-01-01DOI: 10.15576/ASP.FC/2018.17.1.165
R. Sobolewski
The aim of this study is to evaluate time distribution of gaseous pollutants’ concentration levels, sulphur dioxide (SO2, μg · m –3), nitrogen dioxide (NO2, μg · m –3) and to characterise biothermal conditions, based on subjective temperature index (STI, °C) in Legnica, Lower Silesian Voivodeship. Assessment of the seasonal and daily SO2 and NO2 concentration and STI values in the studied period was based on descriptive statistics. The analysis of NO2 and SO2 concentration frequency was performed in reference to the scale applied in the interpretation of the STI. The assessment of the analysed period’s biothermal conditions did not show an occurrence of thermal sensation “boiling hot”. The most adverse aerosanitary conditions caused by high concentration of SO2 in the air are accompanied by a sensation of “freezing”. The highest fluctuation in the content of NO2 and SO2 in the air was characteristic for the winter with the occurrence of “freezing” and “very cold” sensation. The highest concentration of SO2 amounting to 234 μg ∙ m –3 was recorded in the winter of 2005 and highest NO2 concentration was recorded in the spring of 2009, amounting to 184 μg ∙ m –3. The NO2 and SO2 concentration shows a reverse circadian course in comparison to the course of apparent temperature.
{"title":"ASSESSMENT OF AIR QUALITY IN LEGNICA (POLAND, LOWER SILESIAN VOIVODESHIP) BASED ON SELECTED GASEOUS POLLUTANTS AND SUBJECTIVE TEMPERATURE INDEX","authors":"R. Sobolewski","doi":"10.15576/ASP.FC/2018.17.1.165","DOIUrl":"https://doi.org/10.15576/ASP.FC/2018.17.1.165","url":null,"abstract":"The aim of this study is to evaluate time distribution of gaseous pollutants’ concentration levels, sulphur dioxide (SO2, μg · m –3), nitrogen dioxide (NO2, μg · m –3) and to characterise biothermal conditions, based on subjective temperature index (STI, °C) in Legnica, Lower Silesian Voivodeship. Assessment of the seasonal and daily SO2 and NO2 concentration and STI values in the studied period was based on descriptive statistics. The analysis of NO2 and SO2 concentration frequency was performed in reference to the scale applied in the interpretation of the STI. The assessment of the analysed period’s biothermal conditions did not show an occurrence of thermal sensation “boiling hot”. The most adverse aerosanitary conditions caused by high concentration of SO2 in the air are accompanied by a sensation of “freezing”. The highest fluctuation in the content of NO2 and SO2 in the air was characteristic for the winter with the occurrence of “freezing” and “very cold” sensation. The highest concentration of SO2 amounting to 234 μg ∙ m –3 was recorded in the winter of 2005 and highest NO2 concentration was recorded in the spring of 2009, amounting to 184 μg ∙ m –3. The NO2 and SO2 concentration shows a reverse circadian course in comparison to the course of apparent temperature.","PeriodicalId":51904,"journal":{"name":"Acta Scientiarum Polonorum-Formatio Circumiectus","volume":"11 1","pages":""},"PeriodicalIF":0.4,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74303147","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-01-01DOI: 10.15576/ASP.FC/2018.17.1.53
E. Raszeja, A. Skóra
River valleys, apart from their natural values, have unique visual features. The perception of landscape is mainly determined by its spatial structure. Contemporary scientific research confirms significant compliance in the terms of ecological and aesthetic evaluations. The paper presents the results of the research carried out by the authors in the Valley of Samica Kierska River in Wielkopolska which is an area protected as a part of Natura 2000 network. There were three main objectives of the research: 1) an analysis of the relations between spatial structure and visual perception of landscape in the Valley of Samica Kierska River, 2) a comparison of the expert evaluation of the visual values with public aesthetic preferences towards landscape, 3) an assessment of the potential effectiveness of the existing conservation methods in Natura 2000 network for the preservation of landscape visual features.
{"title":"PRESERVATION OF RIVER VALLEYS IN WIELKOPOLSKA IN THE LANDSCAPE PERCEPTION TERMS – THE CASE OF THE VALLEY OF SAMICA KIERSKA RIVER","authors":"E. Raszeja, A. Skóra","doi":"10.15576/ASP.FC/2018.17.1.53","DOIUrl":"https://doi.org/10.15576/ASP.FC/2018.17.1.53","url":null,"abstract":"River valleys, apart from their natural values, have unique visual features. The perception of landscape is mainly determined by its spatial structure. Contemporary scientific research confirms significant compliance in the terms of ecological and aesthetic evaluations. The paper presents the results of the research carried out by the authors in the Valley of Samica Kierska River in Wielkopolska which is an area protected as a part of Natura 2000 network. There were three main objectives of the research: 1) an analysis of the relations between spatial structure and visual perception of landscape in the Valley of Samica Kierska River, 2) a comparison of the expert evaluation of the visual values with public aesthetic preferences towards landscape, 3) an assessment of the potential effectiveness of the existing conservation methods in Natura 2000 network for the preservation of landscape visual features.","PeriodicalId":51904,"journal":{"name":"Acta Scientiarum Polonorum-Formatio Circumiectus","volume":"T167 1","pages":""},"PeriodicalIF":0.4,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82303442","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-01-01DOI: 10.15576/ASP.FC/2018.17.1.103
A. Chorostyński, A. Łach, G. Pasztyła
The study included water samples from 10 test points located in the northern parts of Sanok and Lesko counties. The following analytical methods have been used: AAS (FAAS, CVAAS, HGAAS), ICP-MS, ICPOES, Ion chromatography, Acid-base titration, argentometry, turbidimetry and also bacteriological tests. Two sources were identified as “natural mineral hard medium-mineralised waters” with low iron content. Four sulphide springs have been found. The Lesko source can be characterized as “a specific therapeutic sulphide water” with a content of divalent sulphur, determined iodometrically, above 1 mg · dm–3 and without any bacteriological concerns. Water from Lesko, apart from small amounts of metaboric and orthosilicic acid, is slightly alkaline with a strong negative ORP potential (–230 mV), which makes it healthy (an antioxidant that eliminates free radicals). In all waters the presence of heavy metals, arsenic, lithium, iron, manganese, alkali metals and alkaline earth metals has been indicated. The influence on the human body of analytically marked substances has been described.
{"title":"PHYSICOCHEMICAL PARAMETERS AND BACTERIOLOGY OF MINERAL AND SULPHATE WATERS DISCOVERED AROUND SANOK AND LESKO, AND THE PROSPECTS FOR THEIR MEDICAL USE","authors":"A. Chorostyński, A. Łach, G. Pasztyła","doi":"10.15576/ASP.FC/2018.17.1.103","DOIUrl":"https://doi.org/10.15576/ASP.FC/2018.17.1.103","url":null,"abstract":"The study included water samples from 10 test points located in the northern parts of Sanok and Lesko counties. The following analytical methods have been used: AAS (FAAS, CVAAS, HGAAS), ICP-MS, ICPOES, Ion chromatography, Acid-base titration, argentometry, turbidimetry and also bacteriological tests. Two sources were identified as “natural mineral hard medium-mineralised waters” with low iron content. Four sulphide springs have been found. The Lesko source can be characterized as “a specific therapeutic sulphide water” with a content of divalent sulphur, determined iodometrically, above 1 mg · dm–3 and without any bacteriological concerns. Water from Lesko, apart from small amounts of metaboric and orthosilicic acid, is slightly alkaline with a strong negative ORP potential (–230 mV), which makes it healthy (an antioxidant that eliminates free radicals). In all waters the presence of heavy metals, arsenic, lithium, iron, manganese, alkali metals and alkaline earth metals has been indicated. The influence on the human body of analytically marked substances has been described.","PeriodicalId":51904,"journal":{"name":"Acta Scientiarum Polonorum-Formatio Circumiectus","volume":"220 ","pages":""},"PeriodicalIF":0.4,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72428561","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-01-01DOI: 10.15576/ASP.FC/2018.17.1.95
J. Chmist, K. Szoszkiewicz, M. Hämmerling
In paper, the ability to use of the biological early warning systems, in tap water quality biomonitoring was analyzed, based on multiple-criteria decision analysis. Five groups of organisms (invertebrates, fishes, algae, fungi and bacteria) were analyzed for the sensitivity to disturbance, the area of use, the amount of detected components, the rate of reaction and the data interpretation. Both analyzes revealed, that invertebrates are the most sensitive bioindicators (49% AHP, 29% Rembrandt). The other organisms which are useful in BEWS systems are algae and fishes. More problematic may be systems based on fungi and bacteria.Both analysis Rembrandt, as well as analytic hierarchy process(AHP) have indicated the rate of reaction as the most important factor in BEWS. All of BEWS systems are focused on reduce the time required to obtain the information about pollution presence, because the standard monitoring of tap water quality, based on physical and chemical methods, are usually time consuming.
{"title":"SELECTION OF THE MOST EFFECTIVE BIOLOGICAL EARLY WARNING SYSTEM, BASED ON AHP AND REMBRANDT ANALYSIS","authors":"J. Chmist, K. Szoszkiewicz, M. Hämmerling","doi":"10.15576/ASP.FC/2018.17.1.95","DOIUrl":"https://doi.org/10.15576/ASP.FC/2018.17.1.95","url":null,"abstract":"In paper, the ability to use of the biological early warning systems, in tap water quality biomonitoring was analyzed, based on multiple-criteria decision analysis. Five groups of organisms (invertebrates, fishes, algae, fungi and bacteria) were analyzed for the sensitivity to disturbance, the area of use, the amount of detected components, the rate of reaction and the data interpretation. Both analyzes revealed, that invertebrates are the most sensitive bioindicators (49% AHP, 29% Rembrandt). The other organisms which are useful in BEWS systems are algae and fishes. More problematic may be systems based on fungi and bacteria.Both analysis Rembrandt, as well as analytic hierarchy process(AHP) have indicated the rate of reaction as the most important factor in BEWS. All of BEWS systems are focused on reduce the time required to obtain the information about pollution presence, because the standard monitoring of tap water quality, based on physical and chemical methods, are usually time consuming.","PeriodicalId":51904,"journal":{"name":"Acta Scientiarum Polonorum-Formatio Circumiectus","volume":"42 1","pages":""},"PeriodicalIF":0.4,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81619762","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-01-01DOI: 10.15576/asp.fc/2018.18.2.13
B. Michalec, Monika Zwolenik
Aim of the study The paper presents the results of studies carried out in the channel of the Będkówka stream that were to assess the influence of large roughness elements on the change of value of roughness and resistance coefficients. Material and methods In a stream section selected for the study nine measurement cross-sections were designated and in three of them large roughness elements were present. Dimensionless resistance coefficient (λ) was calculated from the Colebrook–White equation. Results and conclusions It was stated that in the cross-sections, where large roughness elements were present, the values of water flow velocity, resistance coefficients, as well as roughness coefficients are higher than in other cross-sections. Also, the sectional cover coefficient (ω) and the degree of change of roughness coefficient Δn were calculated. Regressive dependency Δn = f(ω) of assessment of the hydraulic conditions of water flow change, which is expressed with the change of roughness coefficient was defined.
{"title":"ASSESSMENT OF THE INFLUENCE OF LARGE ROUGHNESS ELEMENTS ON HYDRAULIC CONDITIONS OF WATER FLOW IN THE BĘDKÓWKA STREAM CHANNEL","authors":"B. Michalec, Monika Zwolenik","doi":"10.15576/asp.fc/2018.18.2.13","DOIUrl":"https://doi.org/10.15576/asp.fc/2018.18.2.13","url":null,"abstract":"Aim of the study The paper presents the results of studies carried out in the channel of the Będkówka stream that were to assess the influence of large roughness elements on the change of value of roughness and resistance coefficients. Material and methods In a stream section selected for the study nine measurement cross-sections were designated and in three of them large roughness elements were present. Dimensionless resistance coefficient (λ) was calculated from the Colebrook–White equation. Results and conclusions It was stated that in the cross-sections, where large roughness elements were present, the values of water flow velocity, resistance coefficients, as well as roughness coefficients are higher than in other cross-sections. Also, the sectional cover coefficient (ω) and the degree of change of roughness coefficient Δn were calculated. Regressive dependency Δn = f(ω) of assessment of the hydraulic conditions of water flow change, which is expressed with the change of roughness coefficient was defined.","PeriodicalId":51904,"journal":{"name":"Acta Scientiarum Polonorum-Formatio Circumiectus","volume":"252 1","pages":""},"PeriodicalIF":0.4,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76653325","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-01-01DOI: 10.15576/asp.fc/2018.18.2.121
R. Mazur
Aim of the study Adaptation of MBBR technology for the treatment of highly degraded waters in small water reservoirs. Investigation of the effectiveness of organic pollutants treatment in waters with highly polluted (or easily biodegradable) municipal sewage. Checking the effectiveness of nutrient removal during the process of cleaning this type of pollutants. Material and methods The study was conducted in laboratory conditions on a semi-technical scale. Diluted municipal sewage was treated in order to determine purification efficiency for each laboratory stand. The experiments were carried out in 4 research stands (volume of wastewater in each tank amounted to 1000 L), whereas each was equipped with a MBBR bioreactor with a moving bed (biofilm carriers). The physicochemical parameters of pH, redox, and oxygen concentration were examined, and laboratory analyses were performed to indicate changes in COD, BOD5, and selected forms of NH4 and PO4. On the basis of the obtained results, the effectiveness of the wastewater treatment was demonstrated, and the hydraulic parameters of the installation were modelled. Results and conclusions The results of experimental work indicate a significant effectiveness of the process of purifying and removing nutrients in MBBR installations. After designing a suitable floating platform, it will be possible to introduce such installations into degraded water reservoirs for their purification.
{"title":"THE CONCEPT FOR A RECLAMATION TECHNOLOGY OF POLLUTED SMALL WATER RESERVOIRS, WITH THE APPLICATION OF MBBR REACTORS","authors":"R. Mazur","doi":"10.15576/asp.fc/2018.18.2.121","DOIUrl":"https://doi.org/10.15576/asp.fc/2018.18.2.121","url":null,"abstract":"Aim of the study Adaptation of MBBR technology for the treatment of highly degraded waters in small water reservoirs. Investigation of the effectiveness of organic pollutants treatment in waters with highly polluted (or easily biodegradable) municipal sewage. Checking the effectiveness of nutrient removal during the process of cleaning this type of pollutants. Material and methods The study was conducted in laboratory conditions on a semi-technical scale. Diluted municipal sewage was treated in order to determine purification efficiency for each laboratory stand. The experiments were carried out in 4 research stands (volume of wastewater in each tank amounted to 1000 L), whereas each was equipped with a MBBR bioreactor with a moving bed (biofilm carriers). The physicochemical parameters of pH, redox, and oxygen concentration were examined, and laboratory analyses were performed to indicate changes in COD, BOD5, and selected forms of NH4 and PO4. On the basis of the obtained results, the effectiveness of the wastewater treatment was demonstrated, and the hydraulic parameters of the installation were modelled. Results and conclusions The results of experimental work indicate a significant effectiveness of the process of purifying and removing nutrients in MBBR installations. After designing a suitable floating platform, it will be possible to introduce such installations into degraded water reservoirs for their purification.","PeriodicalId":51904,"journal":{"name":"Acta Scientiarum Polonorum-Formatio Circumiectus","volume":"9 1","pages":""},"PeriodicalIF":0.4,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80596218","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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