Finding the most suitable closing law is essential to decrease the shock wave pressure caused by transient flow and minimize the potential damage to equipment. The closure of a valve can occur instantly, rapidly, or gradually, and the appropriate law can be convex, linear, or concave, depending on various factors. These factors include the pipe's characteristics (type, diameter, roughness, and length), the conveyed fluid (nature and temperature), and operating conditions (pressure and flow rate). Other factors that receive less attention, such as the duration of slow closure and the impact of soil load on the pipe, are also considered in this study. The main focus of this article is to investigate how the optimal law evolves based on the time it takes for a valve to gradually close, specifically in the case of a valve located at the end of an underground gravity supply pipe. The findings reveal that when the slow closure time (t) exceeds 0.50 times the return period (t4), the exponent of the optimal law becomes a damped periodic function. Each closure time corresponds to a unique optimal law, and as the valve closure time increases, the range of optimal laws becomes narrower.
{"title":"Optimal valve closing law for improved water hammer control: a case from a water supply pipeline in Guelma, Algeria","authors":"Abdelouaheb Toumi, Fateh Sekiou","doi":"10.2166/aqua.2024.265","DOIUrl":"https://doi.org/10.2166/aqua.2024.265","url":null,"abstract":"\u0000 \u0000 Finding the most suitable closing law is essential to decrease the shock wave pressure caused by transient flow and minimize the potential damage to equipment. The closure of a valve can occur instantly, rapidly, or gradually, and the appropriate law can be convex, linear, or concave, depending on various factors. These factors include the pipe's characteristics (type, diameter, roughness, and length), the conveyed fluid (nature and temperature), and operating conditions (pressure and flow rate). Other factors that receive less attention, such as the duration of slow closure and the impact of soil load on the pipe, are also considered in this study. The main focus of this article is to investigate how the optimal law evolves based on the time it takes for a valve to gradually close, specifically in the case of a valve located at the end of an underground gravity supply pipe. The findings reveal that when the slow closure time (t) exceeds 0.50 times the return period (t4), the exponent of the optimal law becomes a damped periodic function. Each closure time corresponds to a unique optimal law, and as the valve closure time increases, the range of optimal laws becomes narrower.","PeriodicalId":513288,"journal":{"name":"AQUA — Water Infrastructure, Ecosystems and Society","volume":"15 10","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139803923","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}
Finding the most suitable closing law is essential to decrease the shock wave pressure caused by transient flow and minimize the potential damage to equipment. The closure of a valve can occur instantly, rapidly, or gradually, and the appropriate law can be convex, linear, or concave, depending on various factors. These factors include the pipe's characteristics (type, diameter, roughness, and length), the conveyed fluid (nature and temperature), and operating conditions (pressure and flow rate). Other factors that receive less attention, such as the duration of slow closure and the impact of soil load on the pipe, are also considered in this study. The main focus of this article is to investigate how the optimal law evolves based on the time it takes for a valve to gradually close, specifically in the case of a valve located at the end of an underground gravity supply pipe. The findings reveal that when the slow closure time (t) exceeds 0.50 times the return period (t4), the exponent of the optimal law becomes a damped periodic function. Each closure time corresponds to a unique optimal law, and as the valve closure time increases, the range of optimal laws becomes narrower.
{"title":"Optimal valve closing law for improved water hammer control: a case from a water supply pipeline in Guelma, Algeria","authors":"Abdelouaheb Toumi, Fateh Sekiou","doi":"10.2166/aqua.2024.265","DOIUrl":"https://doi.org/10.2166/aqua.2024.265","url":null,"abstract":"\u0000 \u0000 Finding the most suitable closing law is essential to decrease the shock wave pressure caused by transient flow and minimize the potential damage to equipment. The closure of a valve can occur instantly, rapidly, or gradually, and the appropriate law can be convex, linear, or concave, depending on various factors. These factors include the pipe's characteristics (type, diameter, roughness, and length), the conveyed fluid (nature and temperature), and operating conditions (pressure and flow rate). Other factors that receive less attention, such as the duration of slow closure and the impact of soil load on the pipe, are also considered in this study. The main focus of this article is to investigate how the optimal law evolves based on the time it takes for a valve to gradually close, specifically in the case of a valve located at the end of an underground gravity supply pipe. The findings reveal that when the slow closure time (t) exceeds 0.50 times the return period (t4), the exponent of the optimal law becomes a damped periodic function. Each closure time corresponds to a unique optimal law, and as the valve closure time increases, the range of optimal laws becomes narrower.","PeriodicalId":513288,"journal":{"name":"AQUA — Water Infrastructure, Ecosystems and Society","volume":"38 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139863994","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 shortage of freshwater resources caused by azo dye pollution is an acute global issue, which has a great impact on environmental protection and human health. Therefore, the use of new strategies for designing and synthesizing green, efficient, and economical materials for the removal of azo dyes are required. Among the various methods for removal of azo dyes, adsorption by using advanced functional materials, including nanomaterials, metal oxides, metal oxides–polymer composite, biomaterials, and porous materials, have attracted significant attention over the past several years because of their capabilities of brilliant removal efficiency, high selectivity, quick response, reversibility, flexibility in operation, and less harmful by-products. In this review, we report the adsorption of azo dyes and general design principles underlying the above-mentioned functional materials and, in particular, highlight the fundamental mechanisms and effect of various environmental conditions; also, current challenges and opportunities in this exciting field have been emphasized, including the fabrication, subsequent treatment, and potential future applications of such functional materials.
{"title":"A comprehensive review on adsorptive removal of azo dyes using functional materials","authors":"Afsar Khan, Peiwen Ju, Zhengwei Han, Chenquan Ni","doi":"10.2166/aqua.2024.292","DOIUrl":"https://doi.org/10.2166/aqua.2024.292","url":null,"abstract":"\u0000 \u0000 The shortage of freshwater resources caused by azo dye pollution is an acute global issue, which has a great impact on environmental protection and human health. Therefore, the use of new strategies for designing and synthesizing green, efficient, and economical materials for the removal of azo dyes are required. Among the various methods for removal of azo dyes, adsorption by using advanced functional materials, including nanomaterials, metal oxides, metal oxides–polymer composite, biomaterials, and porous materials, have attracted significant attention over the past several years because of their capabilities of brilliant removal efficiency, high selectivity, quick response, reversibility, flexibility in operation, and less harmful by-products. In this review, we report the adsorption of azo dyes and general design principles underlying the above-mentioned functional materials and, in particular, highlight the fundamental mechanisms and effect of various environmental conditions; also, current challenges and opportunities in this exciting field have been emphasized, including the fabrication, subsequent treatment, and potential future applications of such functional materials.","PeriodicalId":513288,"journal":{"name":"AQUA — Water Infrastructure, Ecosystems and Society","volume":"31 15","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139881349","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}
Water utilities are affected by various social, environmental, and technological factors and are increasingly required to enhance their infrastructure and long-term efficiency. Performance indicators are useful tools for assessing the operational, financial, environmental, and social aspects of water systems. Given this background, the author reviewed the literature on performance indicators for the water sector and summarized the research trends as follows. As a perspective, there are a lot of good mathematical and theoretical studies on distribution pipes and leakage management. Future research should address the problems of water utilities, by using multiple levels of performance indicators including social and environmental context in the long term. Asset management and utility management studies address diverse and current problems faced by water utilities. However, there is still room for improvement in standardizing the methodology for data collection, processing, and integration. In addition, it is recommended for future research, to include carbon neutrality aspect, to include pipeline materials and soil information in leakage management, to extend asset management studies to treatment plants, with including additional indicators about human and financial resources.
{"title":"Review of research on performance indicators for water utilities","authors":"Hiroshi Sakai","doi":"10.2166/aqua.2024.224","DOIUrl":"https://doi.org/10.2166/aqua.2024.224","url":null,"abstract":"\u0000 \u0000 Water utilities are affected by various social, environmental, and technological factors and are increasingly required to enhance their infrastructure and long-term efficiency. Performance indicators are useful tools for assessing the operational, financial, environmental, and social aspects of water systems. Given this background, the author reviewed the literature on performance indicators for the water sector and summarized the research trends as follows. As a perspective, there are a lot of good mathematical and theoretical studies on distribution pipes and leakage management. Future research should address the problems of water utilities, by using multiple levels of performance indicators including social and environmental context in the long term. Asset management and utility management studies address diverse and current problems faced by water utilities. However, there is still room for improvement in standardizing the methodology for data collection, processing, and integration. In addition, it is recommended for future research, to include carbon neutrality aspect, to include pipeline materials and soil information in leakage management, to extend asset management studies to treatment plants, with including additional indicators about human and financial resources.","PeriodicalId":513288,"journal":{"name":"AQUA — Water Infrastructure, Ecosystems and Society","volume":"64 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139822105","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}
Water utilities are affected by various social, environmental, and technological factors and are increasingly required to enhance their infrastructure and long-term efficiency. Performance indicators are useful tools for assessing the operational, financial, environmental, and social aspects of water systems. Given this background, the author reviewed the literature on performance indicators for the water sector and summarized the research trends as follows. As a perspective, there are a lot of good mathematical and theoretical studies on distribution pipes and leakage management. Future research should address the problems of water utilities, by using multiple levels of performance indicators including social and environmental context in the long term. Asset management and utility management studies address diverse and current problems faced by water utilities. However, there is still room for improvement in standardizing the methodology for data collection, processing, and integration. In addition, it is recommended for future research, to include carbon neutrality aspect, to include pipeline materials and soil information in leakage management, to extend asset management studies to treatment plants, with including additional indicators about human and financial resources.
{"title":"Review of research on performance indicators for water utilities","authors":"Hiroshi Sakai","doi":"10.2166/aqua.2024.224","DOIUrl":"https://doi.org/10.2166/aqua.2024.224","url":null,"abstract":"\u0000 \u0000 Water utilities are affected by various social, environmental, and technological factors and are increasingly required to enhance their infrastructure and long-term efficiency. Performance indicators are useful tools for assessing the operational, financial, environmental, and social aspects of water systems. Given this background, the author reviewed the literature on performance indicators for the water sector and summarized the research trends as follows. As a perspective, there are a lot of good mathematical and theoretical studies on distribution pipes and leakage management. Future research should address the problems of water utilities, by using multiple levels of performance indicators including social and environmental context in the long term. Asset management and utility management studies address diverse and current problems faced by water utilities. However, there is still room for improvement in standardizing the methodology for data collection, processing, and integration. In addition, it is recommended for future research, to include carbon neutrality aspect, to include pipeline materials and soil information in leakage management, to extend asset management studies to treatment plants, with including additional indicators about human and financial resources.","PeriodicalId":513288,"journal":{"name":"AQUA — Water Infrastructure, Ecosystems and Society","volume":"29 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139881760","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}
This study focuses on the removal of spent engine oil (SEO) spill from the water surface using water hyacinth biomass (WHB)-based sorbents. The raw WHB was modified using extra virgin coconut oil (mainly consisting of lauric acid) to enhance the hydrophobicity and floating ability. With varying amounts of coconut oil and solvent, six diverse types of modified water hyacinth biomass (MWHB) were prepared. Among these MWHBs, an equal proportion of coconut oil and raw WHB with 10% methanol solution exhibited the highest removal of SEO reaching 96%. Various sorption kinetics and isotherm models were examined to understand the SEO sorption process on MWHB. The pseudo-second-order kinetics (R2 0.999) and both the Langmuir and Freundlich isotherm models (R2 0.992 and R2 0.999, respectively) were found to be the best-fitting models. These findings indicated a chemisorption mechanism involving the initial monolayer coverage of SEO molecules on the MWHB surface followed by the development of multilayers. The MWHB achieved a maximum sorption capacity of 4.75 g/g within 60 min. Furthermore, the reusability tests showed that MWHB maintained a sorption capacity of over 90% even after the third sorption–desorption cycle.
{"title":"Utilization of water hyacinth (Eichhornia crassipes) biomass as eco-friendly sorbent for petroleum oil spill cleanup","authors":"Marufa Khondoker, Ranjit Gurav, Sangchul Hwang","doi":"10.2166/aqua.2024.243","DOIUrl":"https://doi.org/10.2166/aqua.2024.243","url":null,"abstract":"\u0000 \u0000 This study focuses on the removal of spent engine oil (SEO) spill from the water surface using water hyacinth biomass (WHB)-based sorbents. The raw WHB was modified using extra virgin coconut oil (mainly consisting of lauric acid) to enhance the hydrophobicity and floating ability. With varying amounts of coconut oil and solvent, six diverse types of modified water hyacinth biomass (MWHB) were prepared. Among these MWHBs, an equal proportion of coconut oil and raw WHB with 10% methanol solution exhibited the highest removal of SEO reaching 96%. Various sorption kinetics and isotherm models were examined to understand the SEO sorption process on MWHB. The pseudo-second-order kinetics (R2 0.999) and both the Langmuir and Freundlich isotherm models (R2 0.992 and R2 0.999, respectively) were found to be the best-fitting models. These findings indicated a chemisorption mechanism involving the initial monolayer coverage of SEO molecules on the MWHB surface followed by the development of multilayers. The MWHB achieved a maximum sorption capacity of 4.75 g/g within 60 min. Furthermore, the reusability tests showed that MWHB maintained a sorption capacity of over 90% even after the third sorption–desorption cycle.","PeriodicalId":513288,"journal":{"name":"AQUA — Water Infrastructure, Ecosystems and Society","volume":"25 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139876357","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}
This study focuses on the removal of spent engine oil (SEO) spill from the water surface using water hyacinth biomass (WHB)-based sorbents. The raw WHB was modified using extra virgin coconut oil (mainly consisting of lauric acid) to enhance the hydrophobicity and floating ability. With varying amounts of coconut oil and solvent, six diverse types of modified water hyacinth biomass (MWHB) were prepared. Among these MWHBs, an equal proportion of coconut oil and raw WHB with 10% methanol solution exhibited the highest removal of SEO reaching 96%. Various sorption kinetics and isotherm models were examined to understand the SEO sorption process on MWHB. The pseudo-second-order kinetics (R2 0.999) and both the Langmuir and Freundlich isotherm models (R2 0.992 and R2 0.999, respectively) were found to be the best-fitting models. These findings indicated a chemisorption mechanism involving the initial monolayer coverage of SEO molecules on the MWHB surface followed by the development of multilayers. The MWHB achieved a maximum sorption capacity of 4.75 g/g within 60 min. Furthermore, the reusability tests showed that MWHB maintained a sorption capacity of over 90% even after the third sorption–desorption cycle.
{"title":"Utilization of water hyacinth (Eichhornia crassipes) biomass as eco-friendly sorbent for petroleum oil spill cleanup","authors":"Marufa Khondoker, Ranjit Gurav, Sangchul Hwang","doi":"10.2166/aqua.2024.243","DOIUrl":"https://doi.org/10.2166/aqua.2024.243","url":null,"abstract":"\u0000 \u0000 This study focuses on the removal of spent engine oil (SEO) spill from the water surface using water hyacinth biomass (WHB)-based sorbents. The raw WHB was modified using extra virgin coconut oil (mainly consisting of lauric acid) to enhance the hydrophobicity and floating ability. With varying amounts of coconut oil and solvent, six diverse types of modified water hyacinth biomass (MWHB) were prepared. Among these MWHBs, an equal proportion of coconut oil and raw WHB with 10% methanol solution exhibited the highest removal of SEO reaching 96%. Various sorption kinetics and isotherm models were examined to understand the SEO sorption process on MWHB. The pseudo-second-order kinetics (R2 0.999) and both the Langmuir and Freundlich isotherm models (R2 0.992 and R2 0.999, respectively) were found to be the best-fitting models. These findings indicated a chemisorption mechanism involving the initial monolayer coverage of SEO molecules on the MWHB surface followed by the development of multilayers. The MWHB achieved a maximum sorption capacity of 4.75 g/g within 60 min. Furthermore, the reusability tests showed that MWHB maintained a sorption capacity of over 90% even after the third sorption–desorption cycle.","PeriodicalId":513288,"journal":{"name":"AQUA — Water Infrastructure, Ecosystems and Society","volume":"17 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139816436","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 shortage of freshwater resources caused by azo dye pollution is an acute global issue, which has a great impact on environmental protection and human health. Therefore, the use of new strategies for designing and synthesizing green, efficient, and economical materials for the removal of azo dyes are required. Among the various methods for removal of azo dyes, adsorption by using advanced functional materials, including nanomaterials, metal oxides, metal oxides–polymer composite, biomaterials, and porous materials, have attracted significant attention over the past several years because of their capabilities of brilliant removal efficiency, high selectivity, quick response, reversibility, flexibility in operation, and less harmful by-products. In this review, we report the adsorption of azo dyes and general design principles underlying the above-mentioned functional materials and, in particular, highlight the fundamental mechanisms and effect of various environmental conditions; also, current challenges and opportunities in this exciting field have been emphasized, including the fabrication, subsequent treatment, and potential future applications of such functional materials.
{"title":"A comprehensive review on adsorptive removal of azo dyes using functional materials","authors":"Afsar Khan, Peiwen Ju, Zhengwei Han, Chenquan Ni","doi":"10.2166/aqua.2024.292","DOIUrl":"https://doi.org/10.2166/aqua.2024.292","url":null,"abstract":"\u0000 \u0000 The shortage of freshwater resources caused by azo dye pollution is an acute global issue, which has a great impact on environmental protection and human health. Therefore, the use of new strategies for designing and synthesizing green, efficient, and economical materials for the removal of azo dyes are required. Among the various methods for removal of azo dyes, adsorption by using advanced functional materials, including nanomaterials, metal oxides, metal oxides–polymer composite, biomaterials, and porous materials, have attracted significant attention over the past several years because of their capabilities of brilliant removal efficiency, high selectivity, quick response, reversibility, flexibility in operation, and less harmful by-products. In this review, we report the adsorption of azo dyes and general design principles underlying the above-mentioned functional materials and, in particular, highlight the fundamental mechanisms and effect of various environmental conditions; also, current challenges and opportunities in this exciting field have been emphasized, including the fabrication, subsequent treatment, and potential future applications of such functional materials.","PeriodicalId":513288,"journal":{"name":"AQUA — Water Infrastructure, Ecosystems and Society","volume":"467 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139821262","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}
This study evaluates the impact of environmental flow regimes in the river habitats on the biodiversity index of macroinvertebrates. A multiple linear regression model was developed to simulate the biodiversity index of macroinvertebrates in which two combined indicators were considered as the inputs. A combined water quality index that can integrate the impacts of all key water quality parameters as well as a combined physical flow index were considered as the inputs of the biodiversity model. Based on the case study results, some hydrological indices of environmental flows such as 10% of mean annual flow would remarkably weaken the biodiversity of macroinvertebrates. By contrast, some environmental flow indices such as the physical habitat index can mitigate the impacts of changing flow regimes by minimizing the differences between the biodiversity index in the natural flow and environmental flow regimes. Furthermore, some hydrological indicators such as 60% of mean annual flow performed similarly to physical habitat methods. However, the results demonstrated that the degradation of water quality due to human activities has considerably weakened the biodiversity even in the natural flow regime, which means implementing an environmental flow regime without water quality improvement might worsen biodiversity. This study highlights that environmental flow studies should be incorporated within the biodiversity modeling of macroinvertebrates.
{"title":"Analyzing the impact of environmental flow indices on protecting the biodiversity of macroinvertebrates","authors":"M. Sedighkia, Asghar Abdoli","doi":"10.2166/aqua.2024.324","DOIUrl":"https://doi.org/10.2166/aqua.2024.324","url":null,"abstract":"\u0000 \u0000 This study evaluates the impact of environmental flow regimes in the river habitats on the biodiversity index of macroinvertebrates. A multiple linear regression model was developed to simulate the biodiversity index of macroinvertebrates in which two combined indicators were considered as the inputs. A combined water quality index that can integrate the impacts of all key water quality parameters as well as a combined physical flow index were considered as the inputs of the biodiversity model. Based on the case study results, some hydrological indices of environmental flows such as 10% of mean annual flow would remarkably weaken the biodiversity of macroinvertebrates. By contrast, some environmental flow indices such as the physical habitat index can mitigate the impacts of changing flow regimes by minimizing the differences between the biodiversity index in the natural flow and environmental flow regimes. Furthermore, some hydrological indicators such as 60% of mean annual flow performed similarly to physical habitat methods. However, the results demonstrated that the degradation of water quality due to human activities has considerably weakened the biodiversity even in the natural flow regime, which means implementing an environmental flow regime without water quality improvement might worsen biodiversity. This study highlights that environmental flow studies should be incorporated within the biodiversity modeling of macroinvertebrates.","PeriodicalId":513288,"journal":{"name":"AQUA — Water Infrastructure, Ecosystems and Society","volume":"64 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139601497","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 the current study is to evaluate and appreciate, various design parameters for simple solar stills impact yielding rate and heat transmission characteristics. For improved utility, indicators and performance comparisons of several solar stills have also been created. In the case of the enhanced wick, most of the researchers use wick on water surfaces to enhance the evaporation rate. It has been observed that the solar stills with wet wick on the side walls provide high porosity with thin film evaporation thus improving distillation. Also, the solar stills with wick integration were superior to other types of solar desalination system that utilizes wicking materials to enhance the evaporation and condensation processes. The interpretations were significantly carried out, and numerous recommendations for future improvement and the generation of novel concepts to work around practical constraints were also made in the present study.
{"title":"Impact of various design parameters on solar still systems performance: a review","authors":"Maneesh Kumar Shivhare, Samsher, Anil Kumar","doi":"10.2166/aqua.2024.290","DOIUrl":"https://doi.org/10.2166/aqua.2024.290","url":null,"abstract":"\u0000 \u0000 The objective of the current study is to evaluate and appreciate, various design parameters for simple solar stills impact yielding rate and heat transmission characteristics. For improved utility, indicators and performance comparisons of several solar stills have also been created. In the case of the enhanced wick, most of the researchers use wick on water surfaces to enhance the evaporation rate. It has been observed that the solar stills with wet wick on the side walls provide high porosity with thin film evaporation thus improving distillation. Also, the solar stills with wick integration were superior to other types of solar desalination system that utilizes wicking materials to enhance the evaporation and condensation processes. The interpretations were significantly carried out, and numerous recommendations for future improvement and the generation of novel concepts to work around practical constraints were also made in the present study.","PeriodicalId":513288,"journal":{"name":"AQUA — Water Infrastructure, Ecosystems and Society","volume":"8 7","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139600107","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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