The objective of this article is to present an analysis of the utilization of renewable energy sources in Latvia and Poland since their accession to the European Union (EU), and to evaluate the progress made in meeting the environmental targets established by the EU through the implementation of Directive 2009/28/EC. The analysis is based on data obtained from the "Our World in Data" database as well as government documents. The findings reveal that while Latvia has successfully met the EU requirements, Poland has yet to achieve the set targets. However, Poland efforts in the development of renewable energy sources indicate a promising trajectory, mirroring those undertaken by Latvia. These implemented measures can serve as a valuable reference for other countries in their pursuit of a greener future.
{"title":"Comparison of the Use of Renewable Energy Sources (Res) by Poland and Latvia in the Perspective of the Environmental Objectives Set by the European Union","authors":"Agata Janaszek, Edyta Nartowska, Alina Rozenvalde, Ivans Zotovs","doi":"10.59440/ceer/175466","DOIUrl":"https://doi.org/10.59440/ceer/175466","url":null,"abstract":"The objective of this article is to present an analysis of the utilization of renewable energy sources in Latvia and Poland since their accession to the European Union (EU), and to evaluate the progress made in meeting the environmental targets established by the EU through the implementation of Directive 2009/28/EC. The analysis is based on data obtained from the \"Our World in Data\" database as well as government documents. The findings reveal that while Latvia has successfully met the EU requirements, Poland has yet to achieve the set targets. However, Poland efforts in the development of renewable energy sources indicate a promising trajectory, mirroring those undertaken by Latvia. These implemented measures can serve as a valuable reference for other countries in their pursuit of a greener future.","PeriodicalId":54121,"journal":{"name":"Civil and Environmental Engineering Reports","volume":"113 2","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138965062","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}
Stiffeners reinforcing silo’s wall made from corrugated sheets are main structural elements sustaining meridional forces evoked by shear forces, source of which is friction of the material stored inside silo. Buckling resistance of stiffeners can be assessed by the method recommended in PN-EN 1993-4-1:2009/A1-2017-08E and in the draft of the Eurocode prEN 1993-4-1:2022. This method consists in determination of stiffener’s resistance treated as a column resting on elastic substrate which is the susceptible wall of the silo. It means that it was assumed that the stiffness of the sheeting resists buckling displacements normal to the silo wall. The procedure recommended in mentioned Eurocodes requires determination of stiffness coefficient K on the basis of the flexibility of an equivalent arch of the span equal to the double circumferential separation between adjacent stiffeners. The stiffness coefficient K was derived in the paper using classical mechanics methods and its value was compared to the one given in mentioned Eurocodes. Careful comparative analyses resulted in the identification of errors in one of the Eurocode formulae, which could result in a significant misestimation of the buckling resistance of the stiffeners. The proposed amendment led to a full correspondence between the final formula for K derived in the paper and that proposed in the referenced Eurocodes. The errors found were reported to the coordinator of the CEN working group updating EN 1993-4-1.
用波纹板加固筒仓壁的加劲板是承受由剪切力引起的经向力的主要结构元件，剪切力的来源是筒仓内储存材料的摩擦力。加劲梁的抗屈曲性能可通过 PN-EN 1993-4-1:2009/A1-2017-08E 和欧洲规范 prEN 1993-4-1:2022 草案中推荐的方法进行评估。该方法是将加劲杆视为支撑在弹性基体（即筒仓的易损壁）上的柱子来确定其阻力。这意味着假定板材的刚度可以抵抗筒仓壁的法向屈曲位移。上述欧洲规范中推荐的程序要求根据跨度等于相邻加强筋之间双周间隔的等效拱的柔性来确定刚度系数 K。本文采用经典力学方法得出了刚度系数 K，并将其值与上述欧洲规范中给出的值进行了比较。通过仔细的比较分析，确定了欧洲规范公式中的一个错误，该错误可能导致对加劲件抗屈曲性能的严重误估。修改建议使论文中得出的 K 的最终公式与参考的欧洲规范中提出的公式完全一致。发现的错误已报告给 CEN 更新 EN 1993-4-1 工作组的协调员。
{"title":"Flexural Buckling Resistance of Stiffeners Reinforcing Wall of a Steel Silo","authors":"Jakub Marcinowski","doi":"10.59440/ceer/176939","DOIUrl":"https://doi.org/10.59440/ceer/176939","url":null,"abstract":"Stiffeners reinforcing silo’s wall made from corrugated sheets are main structural elements sustaining meridional forces evoked by shear forces, source of which is friction of the material stored inside silo. Buckling resistance of stiffeners can be assessed by the method recommended in PN-EN 1993-4-1:2009/A1-2017-08E and in the draft of the Eurocode prEN 1993-4-1:2022. This method consists in determination of stiffener’s resistance treated as a column resting on elastic substrate which is the susceptible wall of the silo. It means that it was assumed that the stiffness of the sheeting resists buckling displacements normal to the silo wall. The procedure recommended in mentioned Eurocodes requires determination of stiffness coefficient K on the basis of the flexibility of an equivalent arch of the span equal to the double circumferential separation between adjacent stiffeners. The stiffness coefficient K was derived in the paper using classical mechanics methods and its value was compared to the one given in mentioned Eurocodes. Careful comparative analyses resulted in the identification of errors in one of the Eurocode formulae, which could result in a significant misestimation of the buckling resistance of the stiffeners. The proposed amendment led to a full correspondence between the final formula for K derived in the paper and that proposed in the referenced Eurocodes. The errors found were reported to the coordinator of the CEN working group updating EN 1993-4-1.","PeriodicalId":54121,"journal":{"name":"Civil and Environmental Engineering Reports","volume":"13 3","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139001347","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}
The exploitation of the deposit necessitates continuous optimisation of the ventilation network, as well as the need to change fans. One way of optimising the network and increasing the efficiency of ventilation may be to make interlevel connections in the form of large-diameter openings. In this study, simulation calculations were carried out by assuming the drilling of large-diameter holes and the selection of parameters for the main ventilation fans. An evaluation of the ventilation network was carried out by checking the validity of the simulation data with the actual data. The ventilation calculations showed that it is possible to increase the ventilation efficiency through the aforementioned method. The results of the calculations are presented with tabular data and simplified ventilation diagrams. The creation of at least one large-diameter opening and the upgrading of the main ventilation fans will ensure a minimum of proper functioning of the ventilation system. The drilling of a further opening will ensure that there is sufficient air in each ventilation area - an increase of 50% in the mine's air volume will be achieved.
{"title":"Interlevel Connections as a Way to Increase the Ventilation Efficiency of a Mine Ventilation Network - a Case Study","authors":"K. Słota, Z. Słota, A. Morcinek-Słota","doi":"10.59440/ceer/176544","DOIUrl":"https://doi.org/10.59440/ceer/176544","url":null,"abstract":"The exploitation of the deposit necessitates continuous optimisation of the ventilation network, as well as the need to change fans. One way of optimising the network and increasing the efficiency of ventilation may be to make interlevel connections in the form of large-diameter openings. In this study, simulation calculations were carried out by assuming the drilling of large-diameter holes and the selection of parameters for the main ventilation fans. An evaluation of the ventilation network was carried out by checking the validity of the simulation data with the actual data. The ventilation calculations showed that it is possible to increase the ventilation efficiency through the aforementioned method. The results of the calculations are presented with tabular data and simplified ventilation diagrams. The creation of at least one large-diameter opening and the upgrading of the main ventilation fans will ensure a minimum of proper functioning of the ventilation system. The drilling of a further opening will ensure that there is sufficient air in each ventilation area - an increase of 50% in the mine's air volume will be achieved.","PeriodicalId":54121,"journal":{"name":"Civil and Environmental Engineering Reports","volume":"124 11","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138999613","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}
The composting process is a natural method of waste disposal. Decomposition of organic matter occur with the participation of various groups of microorganisms. Using glyphosate-based herbicides aims to reduce agricultural losses. Biodegradation of glyphosate in soil is obtain with bacteria and fungi and may affect their functioning. The purpose of this study was evaluating the effects of glyphosate on bacterial diversity during composting and to monitor potential changes in community structure and species abundance. The addition of glyphosate did not affect the morphology of the tested groups of bacteria and did not cause changes in the morphological structure of fungi. Sampling after 10 minutes, 24 hours, 48 hours and 72 hours showed that the abundance of bacterial colonies changed over time compared to the control groups. However, the results suggest that the addition of glyphosate is insufficient to influence the composting process, thus disturbing the specific biocenosis.
{"title":"Short- term Influence of Glyphosate on Microorganisms in Backyard Compost","authors":"Klaudia Kwiatkowska","doi":"10.59440/ceer/176366","DOIUrl":"https://doi.org/10.59440/ceer/176366","url":null,"abstract":"The composting process is a natural method of waste disposal. Decomposition of organic matter occur with the participation of various groups of microorganisms. Using glyphosate-based herbicides aims to reduce agricultural losses. Biodegradation of glyphosate in soil is obtain with bacteria and fungi and may affect their functioning. The purpose of this study was evaluating the effects of glyphosate on bacterial diversity during composting and to monitor potential changes in community structure and species abundance. The addition of glyphosate did not affect the morphology of the tested groups of bacteria and did not cause changes in the morphological structure of fungi. Sampling after 10 minutes, 24 hours, 48 hours and 72 hours showed that the abundance of bacterial colonies changed over time compared to the control groups. However, the results suggest that the addition of glyphosate is insufficient to influence the composting process, thus disturbing the specific biocenosis.","PeriodicalId":54121,"journal":{"name":"Civil and Environmental Engineering Reports","volume":"659 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138973873","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}
Due to the potential microbiological hazard associated with discharging treated sewage into the receiving body, its disinfection is a key issue to protect ecological safety and human health. Water scarcity and drinking water supply, irrigation, rapid industrialization, use of treated water, protection of water sources, overpopulation and environmental protection force us to look for solutions to ensure safe reuse of wastewater, and this depends primarily on the quality of wastewater disinfection. Many wastewater disinfection methods are commonly used. One of the chemical processes of disinfection sludge is ozonation. Ozonation is widely used in wastewater treatment by oxidation, because ozone is a very strong and effective oxidizing agent. Studies have shown that the effectiveness of ozone in disinfecting water and sewage is up to 50% greater than that of chlorine . An additional advantage of this method is that it also eliminates odors that may be unavailable. The article presents the results of research on the effectiveness of ozonation treatment in the disinfection of treated sewage, based on indicator bacteria such as coliforms, including Escherichia coli, mesophiles, psychrophiles, and spores. The study took into account various effects of time (dose) and temperature. For the purpose of this study, both traditional and modern methods of assessing microbiological quality of wastewater were used. The first one is represented by conventional culture measurements and the second one by using a luminometer (ATP) and flow cytometer (FCM).
{"title":"Ozonation in Wastewater Disinfection","authors":"J. Zamorska, Izabela Kiełb-Sotkiewicz","doi":"10.59440/ceer/175796","DOIUrl":"https://doi.org/10.59440/ceer/175796","url":null,"abstract":"Due to the potential microbiological hazard associated with discharging treated sewage into the receiving body, its disinfection is a key issue to protect ecological safety and human health. Water scarcity and drinking water supply, irrigation, rapid industrialization, use of treated water, protection of water sources, overpopulation and environmental protection force us to look for solutions to ensure safe reuse of wastewater, and this depends primarily on the quality of wastewater disinfection. Many wastewater disinfection methods are commonly used. One of the chemical processes of disinfection sludge is ozonation. Ozonation is widely used in wastewater treatment by oxidation, because ozone is a very strong and effective oxidizing agent. Studies have shown that the effectiveness of ozone in disinfecting water and sewage is up to 50% greater than that of chlorine . An additional advantage of this method is that it also eliminates odors that may be unavailable. \u0000The article presents the results of research on the effectiveness of ozonation treatment in the disinfection of treated sewage, based on indicator bacteria such as coliforms, including Escherichia coli, mesophiles, psychrophiles, and spores. The study took into account various effects of time (dose) and temperature. For the purpose of this study, both traditional and modern methods of assessing microbiological quality of wastewater were used. The first one is represented by conventional culture measurements and the second one by using a luminometer (ATP) and flow cytometer (FCM).","PeriodicalId":54121,"journal":{"name":"Civil and Environmental Engineering Reports","volume":"15 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139001405","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}
The pandemic undoubtedly had a significant impact on local development management processes in municipalities in economic, social, environmental and institutional-political dimensions. The article presents and evaluates various activities of municipal governments in the field of environmental management for climate protection and formulates recommendations for municipalities in this regard. The main purpose of this article is to assess the condition of climate change adaptation in municipalities before and after the pandemic, particularly in Polish municipalities, based on the environmental specific indicators of the Central Statistical Office. The purpose of the paper was realized on the basis of a review of the latest literature on the subject, domestic and foreign, as well as quantitative and qualitative comparative analysis. The study was carried out in thirty Polish urban-rural municipalities, , at the same time district cities (cities of the seat of county government, cities, "micro capitals" of counties), with varying own incomes. In Polish municipalities, climate change adaptation priorities have changed in very positive terms after the pandemic, in particular, this applies to municipal spending on ambient air protection (including renewable energy sources, thermal modernization, etc.), which has increased two or even three times compared to the time before the pandemic, which has not yet been recognized and studied in the conducted review of the recent literature on the subject. At the same time, the pandemic period slowed down the remaining investment and management of environmental activities, and generally did not improve waste management in municipalities.
{"title":"The Condition of Climate Change Adaptation in Polish Municipalities Before and After the Pandemic on the Basis of Cso Environmental Indicators - Management Implications","authors":"Tomasz Śmietanka","doi":"10.59440/ceer/175794","DOIUrl":"https://doi.org/10.59440/ceer/175794","url":null,"abstract":"The pandemic undoubtedly had a significant impact on local development management processes in municipalities in economic, social, environmental and institutional-political dimensions. The article presents and evaluates various activities of municipal governments in the field of environmental management for climate protection and formulates recommendations for municipalities in this regard. The main purpose of this article is to assess the condition of climate change adaptation in municipalities before and after the pandemic, particularly in Polish municipalities, based on the environmental specific indicators of the Central Statistical Office. The purpose of the paper was realized on the basis of a review of the latest literature on the subject, domestic and foreign, as well as quantitative and qualitative comparative analysis. The study was carried out in thirty Polish urban-rural municipalities, , at the same time district cities (cities of the seat of county government, cities, \"micro capitals\" of counties), with varying own incomes. In Polish municipalities, climate change adaptation priorities have changed in very positive terms after the pandemic, in particular, this applies to municipal spending on ambient air protection (including renewable energy sources, thermal modernization, etc.), which has increased two or even three times compared to the time before the pandemic, which has not yet been recognized and studied in the conducted review of the recent literature on the subject. At the same time, the pandemic period slowed down the remaining investment and management of environmental activities, and generally did not improve waste management in municipalities.","PeriodicalId":54121,"journal":{"name":"Civil and Environmental Engineering Reports","volume":"118 36","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138599525","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}
The objective of this study is to investigate biogas production by anaerobic digestion using mesophilic bacteria mixed with Palm Oil Mill Effluent (POME). This project aims to determine the volume of biogas generation and volatile fatty acid (VFA) production from chicken manure via the anaerobic digestion process. Anaerobic digestion (AD) of chicken manure (CM) often faces obstacles, including high total ammonia nitrogen (TAN) concentration, inorganic soil particles, and wood chips. The digestion process was carried under batch mode conditions in Scott bottles of 1.0 L active volume. The bottles were immersed in a water bath to control their temperature at 37℃. The characteristics of total solid, volatile solid of mass fraction, pH, and temperature on the amount of biogas produced were studied. The investigation showed that biogas production can be enhanced by inoculation of another material. The optimum biogas composition in the AD system was recorded by Inoculum I, which was achieved on Day 2 at 560 mL/L. The highest cumulative methane yield was observed in the leachate with Inoculum (I), which was 8976 mL/gVS, while the CML produced 4 mL/g VS. The anaerobic digestion (AD) process augmented with inoculum demonstrated heightened efficacy in biogas generation and VFA concentration reduction during the acidogenic phase, surpassing the observed performance in chicken manure leachate.
{"title":"Influence of Mesophilic Bacteria Inoculation with Chicken Manure for Biogas Production Enhancement in Anaerobic Digestion (AD) Process","authors":"Rosnani Alkarimiah","doi":"10.59440/ceer/175795","DOIUrl":"https://doi.org/10.59440/ceer/175795","url":null,"abstract":"The objective of this study is to investigate biogas production by anaerobic digestion using mesophilic bacteria mixed with Palm Oil Mill Effluent (POME). This project aims to determine the volume of biogas generation and volatile fatty acid (VFA) production from chicken manure via the anaerobic digestion process. Anaerobic digestion (AD) of chicken manure (CM) often faces obstacles, including high total ammonia nitrogen (TAN) concentration, inorganic soil particles, and wood chips. The digestion process was carried under batch mode conditions in Scott bottles of 1.0 L active volume. The bottles were immersed in a water bath to control their temperature at 37℃. The characteristics of total solid, volatile solid of mass fraction, pH, and temperature on the amount of biogas produced were studied. The investigation showed that biogas production can be enhanced by inoculation of another material. The optimum biogas composition in the AD system was recorded by Inoculum I, which was achieved on Day 2 at 560 mL/L. The highest cumulative methane yield was observed in the leachate with Inoculum (I), which was 8976 mL/gVS, while the CML produced 4 mL/g VS. The anaerobic digestion (AD) process augmented with inoculum demonstrated heightened efficacy in biogas generation and VFA concentration reduction during the acidogenic phase, surpassing the observed performance in chicken manure leachate.","PeriodicalId":54121,"journal":{"name":"Civil and Environmental Engineering Reports","volume":"101 18","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138600040","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}
Wiktor Halecki, Dawid Bedla, Karol Plesiński, Agnieszka Ziernicka-Wojtaszek
Over time, fragmentation of semi-natural habitats in urban areas has become a pressing concern, disrupting ecological processes within cities. The focus on preserving open ecosystems has grown, highlighting the need to enhance resilience in urban riverside areas for effective ecosystem restoration. Comprehensive studies on river valleys, considering both hydrology and ecology, play a crucial role in urban river ecosystem development. Our article explores the potential of protective zones with urban vegetation and watercourses as Nature-based Solution within Krakow's ongoing riverine park system development. The study's cross-sections in the River Park area revealed dominant velocities ranging from 0.67 to 2.0 m s-1for SWQ (mean annual maximum flow) and below 0.67 m s-1for Q1% (1% annual exceedance probability flow). The hydrological analysis accurately captured the natural river bed channels' curvature, providing the basis for a two-dimensional mathematical model to visualize the hydraulic structure of protected sites. Integrating water and greenery management systems in urban areas offers significant potential for adapting to climate change, mitigating extreme weather events. Our research's novelty lies in applying 2D hydraulic modeling, demonstrating how River Parks can serve as climate change mitigation solutions in urban environments.
随着时间的推移，城市地区半自然栖息地的破碎化已经成为一个紧迫的问题，破坏了城市内的生态过程。保护开放生态系统的重点日益突出，需要加强城市滨江地区的恢复能力，以实现有效的生态系统恢复。综合考虑水文和生态的河谷研究对城市河流生态系统的发展起着至关重要的作用。我们的文章探讨了在克拉科夫正在进行的河流公园系统开发中，城市植被和水道保护区作为基于自然的解决方案的潜力。研究结果显示，河流公园地区的主要流速在SWQ(年平均最大流量)的0.67 ~ 2.0 m s-1之间，Q1%(年超过概率流量的1%)的优势流速在0.67 m s-1以下。水文分析准确地捕捉了天然河床通道的曲率，为建立二维数学模型提供了基础，以可视化保护遗址的水工结构。在城市地区整合水和绿化管理系统为适应气候变化、减轻极端天气事件提供了巨大的潜力。我们研究的新颖之处在于应用二维水力模型，展示了河流公园如何在城市环境中作为减缓气候变化的解决方案。
{"title":"River Park Assessment: 2D Hydraulic Watercourse Modeling for Nature-based Solutions in Urban Area","authors":"Wiktor Halecki, Dawid Bedla, Karol Plesiński, Agnieszka Ziernicka-Wojtaszek","doi":"10.59440/ceer/173574","DOIUrl":"https://doi.org/10.59440/ceer/173574","url":null,"abstract":"Over time, fragmentation of semi-natural habitats in urban areas has become a pressing concern, disrupting ecological processes within cities. The focus on preserving open ecosystems has grown, highlighting the need to enhance resilience in urban riverside areas for effective ecosystem restoration. Comprehensive studies on river valleys, considering both hydrology and ecology, play a crucial role in urban river ecosystem development. Our article explores the potential of protective zones with urban vegetation and watercourses as Nature-based Solution within Krakow's ongoing riverine park system development. The study's cross-sections in the River Park area revealed dominant velocities ranging from 0.67 to 2.0 m s-1for SWQ (mean annual maximum flow) and below 0.67 m s-1for Q1% (1% annual exceedance probability flow). The hydrological analysis accurately captured the natural river bed channels' curvature, providing the basis for a two-dimensional mathematical model to visualize the hydraulic structure of protected sites. Integrating water and greenery management systems in urban areas offers significant potential for adapting to climate change, mitigating extreme weather events. Our research's novelty lies in applying 2D hydraulic modeling, demonstrating how River Parks can serve as climate change mitigation solutions in urban environments.","PeriodicalId":54121,"journal":{"name":"Civil and Environmental Engineering Reports","volume":"458 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136069468","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}
Identifying the mechanical properties of wood in existing buildings allows the search for an effective way to renovate wooden structures. Tests conducted on the historic structure's tissue preclude the use of destructive testing. Individual elements of the structure can be subjected to non-destructive testing (NDT) conducted in situ. The NDT testing methodology presented in the article is based on the use of ultrasonic and sclerometric technology. These methods can be used to determine the sites of biological corrosion and determine the effect of internal defects on the quality of wood. Ultrasonic testing usually uses devices that emit a longitudinal wave. The study additionally applied the author's method using devices analyzing the velocity of transverse wave flow for testing historic wood. The research was conducted on the roof truss of the heritage church of the Sacred Heart of Jesus in Jastrzębie Zdrój.
{"title":"Restrictions and New Possibilities of Technical and Conservation Diagnostics of Wood in Heritage Buildings","authors":"Joanna Drobiec, Beata Nowogońska","doi":"10.59440/ceer/174568","DOIUrl":"https://doi.org/10.59440/ceer/174568","url":null,"abstract":"Identifying the mechanical properties of wood in existing buildings allows the search for an effective way to renovate wooden structures. Tests conducted on the historic structure's tissue preclude the use of destructive testing. Individual elements of the structure can be subjected to non-destructive testing (NDT) conducted in situ. The NDT testing methodology presented in the article is based on the use of ultrasonic and sclerometric technology. These methods can be used to determine the sites of biological corrosion and determine the effect of internal defects on the quality of wood. Ultrasonic testing usually uses devices that emit a longitudinal wave. The study additionally applied the author's method using devices analyzing the velocity of transverse wave flow for testing historic wood. The research was conducted on the roof truss of the heritage church of the Sacred Heart of Jesus in Jastrzębie Zdrój.","PeriodicalId":54121,"journal":{"name":"Civil and Environmental Engineering Reports","volume":"86 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136069043","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}
The objective of this paper is to study the properties of different compositions of concrete made by substituting sand made of crushed limestone, which is over-exploited in Algeria, by two types of sands produced by the recycling of double-layer tiling and granite waste, respectively, with different mass percentages of 0, 10, 20 and 30%. The physical, mechanical and some aspects of the durability properties of six concretes were evaluated and compared to those of a reference concrete. The results obtained show that the incorporation of granite sand up to a rate of 20% improves the compressive strength and the resistance to acid CH3COOH. For concretes made with tiling sand, the best compressive strength was observed in concrete with an addition rate of 10%. Furthermore, good tensile strength by splitting is obtained with rates of up to 30% of the two recycled sands.
{"title":"Performance of Concrete Containing Partial Granite and Tiling Wastes as Fine Aggregate","authors":"Leila Kherraf, Sihem Kherraf, Houria Hebhoub, Mouloud Belachia","doi":"10.59440/ceer/172751","DOIUrl":"https://doi.org/10.59440/ceer/172751","url":null,"abstract":"The objective of this paper is to study the properties of different compositions of concrete made by substituting sand made of crushed limestone, which is over-exploited in Algeria, by two types of sands produced by the recycling of double-layer tiling and granite waste, respectively, with different mass percentages of 0, 10, 20 and 30%. The physical, mechanical and some aspects of the durability properties of six concretes were evaluated and compared to those of a reference concrete. The results obtained show that the incorporation of granite sand up to a rate of 20% improves the compressive strength and the resistance to acid CH3COOH. For concretes made with tiling sand, the best compressive strength was observed in concrete with an addition rate of 10%. Furthermore, good tensile strength by splitting is obtained with rates of up to 30% of the two recycled sands.","PeriodicalId":54121,"journal":{"name":"Civil and Environmental Engineering Reports","volume":"4 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134905657","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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