Dajie Li, Xiao Chu, Chen Chen, Jun Cheng, Weiwei Huang, Fei Yang, Xuesong Yi
To further investigate the synergistic effects of Fe (Ⅲ) and graphene derivatives with varying degrees of oxidation for photocatalysis, commercial titanium dioxide nanoparticles and graphene oxide were employed as precursors to synthesize the catalyst in this study. Graphene oxygenated derivatives and Fe (Ⅲ)-modified titanium dioxide photocatalysts with different oxidation degrees were prepared using a simple one-step solvothermal method. The results demonstrated that the photocatalytic performance in degrading rhodamine B and sulfamethoxazole was enhanced with an increase in the oxidation degrees of graphene materials. Through the combined action of delocalized conjugated π electrons as electron transfer mediators, Fe (Ⅲ) as an electron trap, and photosensitization reactions, titanium dioxide exhibited exceptional photocatalytic properties with the assistance of graphene derivatives and Fe (Ⅲ) co-catalysts in the degradation of organic compounds.
为了进一步研究不同氧化程度的 Fe (Ⅲ)和石墨烯衍生物在光催化方面的协同效应，本研究以商用二氧化钛纳米颗粒和氧化石墨烯为前驱体合成催化剂。采用简单的一步溶热法制备了不同氧化度的石墨烯含氧衍生物和铁（Ⅲ）修饰的二氧化钛光催化剂。结果表明，随着石墨烯材料氧化度的增加，其降解罗丹明 B 和磺胺甲噁唑的光催化性能增强。在石墨烯衍生物和 Fe (Ⅲ)助催化剂的辅助下，通过电子转移介质π电子的脱局域共轭、电子捕获器 Fe (Ⅲ)和光敏化反应的联合作用，二氧化钛在降解有机化合物时表现出优异的光催化性能。
{"title":"Photocatalytic performance of TiO2 modified with graphene derivatives and Fe (Ⅲ) at different thermal reduction temperatures","authors":"Dajie Li, Xiao Chu, Chen Chen, Jun Cheng, Weiwei Huang, Fei Yang, Xuesong Yi","doi":"10.2166/aqua.2024.115","DOIUrl":"https://doi.org/10.2166/aqua.2024.115","url":null,"abstract":"\u0000 To further investigate the synergistic effects of Fe (Ⅲ) and graphene derivatives with varying degrees of oxidation for photocatalysis, commercial titanium dioxide nanoparticles and graphene oxide were employed as precursors to synthesize the catalyst in this study. Graphene oxygenated derivatives and Fe (Ⅲ)-modified titanium dioxide photocatalysts with different oxidation degrees were prepared using a simple one-step solvothermal method. The results demonstrated that the photocatalytic performance in degrading rhodamine B and sulfamethoxazole was enhanced with an increase in the oxidation degrees of graphene materials. Through the combined action of delocalized conjugated π electrons as electron transfer mediators, Fe (Ⅲ) as an electron trap, and photosensitization reactions, titanium dioxide exhibited exceptional photocatalytic properties with the assistance of graphene derivatives and Fe (Ⅲ) co-catalysts in the degradation of organic compounds.","PeriodicalId":513288,"journal":{"name":"AQUA — Water Infrastructure, Ecosystems and Society","volume":" 7","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141826207","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}
Continued global warming is projected to increase the severity of droughts, and, as water scarcity intensifies in different regions, water demand-side management (DSM) has emerged as an important topic. In this study, we present an overview of recent research on the factors that influence water consumption behaviour, considering the scenario of global water availability changes. To do so, we reviewed 55 articles, published from 2010 to 2022, that focused on water consumption behaviour in a drought context. In the reviewed articles, we identified six factors that are most frequently addressed in the literature: psychological factors, water-saving technologies, awareness, water availability context, socioeconomic/demographic characteristics, and governmental policies. Based on the analysis of the findings in the literature regarding these factors, we developed an integrated framework that clarifies how they are interconnected and influence household water consumption.
{"title":"Why do people save water? A systematic review of household water consumption behaviour in times of water availability uncertainty","authors":"Cláudia Orsini Machado de Sousa, Nuno Fouto","doi":"10.2166/aqua.2024.259","DOIUrl":"https://doi.org/10.2166/aqua.2024.259","url":null,"abstract":"\u0000 \u0000 Continued global warming is projected to increase the severity of droughts, and, as water scarcity intensifies in different regions, water demand-side management (DSM) has emerged as an important topic. In this study, we present an overview of recent research on the factors that influence water consumption behaviour, considering the scenario of global water availability changes. To do so, we reviewed 55 articles, published from 2010 to 2022, that focused on water consumption behaviour in a drought context. In the reviewed articles, we identified six factors that are most frequently addressed in the literature: psychological factors, water-saving technologies, awareness, water availability context, socioeconomic/demographic characteristics, and governmental policies. Based on the analysis of the findings in the literature regarding these factors, we developed an integrated framework that clarifies how they are interconnected and influence household water consumption.","PeriodicalId":513288,"journal":{"name":"AQUA — Water Infrastructure, Ecosystems and Society","volume":" 10","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141828366","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}
Rahul Satish, Martin Oberascher, Monica Ender, Thomas Lampalzer, Silvia Rief, R. Sitzenfrei
Panic buying during crises, like the initial hoarding of toilet paper amid COVID-19 restrictions, is mainly driven by social and emotional factors influenced by risk perception and social media content. Similarly, unreasonable drinking water hoarding, i.e., simultaneous withdrawal of water by a large number of customers, can influence the performance of water supply systems (WSS). Decreasing performance (e.g., more friction losses and therefore a smaller outflow rate at faucets) can cause a negative feedback loop that might trigger further water hoarding behaviours. This research explores the socio-technical implications of water hoarding in crisis situations within a WSS. An analysis of an Alpine WSS in Austria reveals that up to 40% of households, with a filling rate of 0.1 L/s (bathtub filling), can hoard without performance drop and negative feedback. Beyond this threshold, impacts become noticeable, leading to inadequate water supply for some households, causing disruptions and negative feedback loops. This emphasizes the need for information campaigns to counter false information, preventing emotional triggers. In conclusion, the research highlights the interplay between technical and social factors in crisis water demand management, stressing the importance of informed interventions to mitigate hoarding behaviour and maintain efficient WSS operation.
{"title":"The socio-technical short-term implications of drinking water hoarding on supply reliability","authors":"Rahul Satish, Martin Oberascher, Monica Ender, Thomas Lampalzer, Silvia Rief, R. Sitzenfrei","doi":"10.2166/aqua.2024.064","DOIUrl":"https://doi.org/10.2166/aqua.2024.064","url":null,"abstract":"\u0000 Panic buying during crises, like the initial hoarding of toilet paper amid COVID-19 restrictions, is mainly driven by social and emotional factors influenced by risk perception and social media content. Similarly, unreasonable drinking water hoarding, i.e., simultaneous withdrawal of water by a large number of customers, can influence the performance of water supply systems (WSS). Decreasing performance (e.g., more friction losses and therefore a smaller outflow rate at faucets) can cause a negative feedback loop that might trigger further water hoarding behaviours. This research explores the socio-technical implications of water hoarding in crisis situations within a WSS. An analysis of an Alpine WSS in Austria reveals that up to 40% of households, with a filling rate of 0.1 L/s (bathtub filling), can hoard without performance drop and negative feedback. Beyond this threshold, impacts become noticeable, leading to inadequate water supply for some households, causing disruptions and negative feedback loops. This emphasizes the need for information campaigns to counter false information, preventing emotional triggers. In conclusion, the research highlights the interplay between technical and social factors in crisis water demand management, stressing the importance of informed interventions to mitigate hoarding behaviour and maintain efficient WSS operation.","PeriodicalId":513288,"journal":{"name":"AQUA — Water Infrastructure, Ecosystems and Society","volume":" 9","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141829275","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}
Kai He, Yu Liu, Jinlong Yuan, Zhidong He, Qidong Yin, Dongjian Xu, Xinfeng Zhao, Maochuan Hu, Haoxian Lu
The water quality of drinking water reservoirs directly impacts the water supply safety for urban residents. This study focuses on the Da Jing Shan Reservoir, a crucial drinking water source for Zhuhai City and the Macau Special Administrative Region. The aim is to establish a prediction model for the water quality of drinking water reservoirs, which can serve as a vital reference for water plants when formulating their water supply plans. In this research, after smoothing the data using the Hodrick-Prescott filter, we utilized the long short-term memory (LSTM) network model to create a water quality prediction model for the Da Jing Shan Reservoir. Simulation calculations reveal that the model's fitting degree is consistently above 60%. Specifically, the prediction accuracy for pH, dissolved oxygen (DO), and biochemical oxygen demand (BOD) in the water quality prediction model aligns with actual results by more than 70%, effectively simulating the reservoir's water quality changes. Moreover, for parameters like pH, DO, BOD, and total phosphorus, the relative forecasting error of the LSTM model is less than 10%, confirming the model's validity. The results of this study offer an essential model reference for predicting water quality for the Da Jing Shan Reservoir.
{"title":"Water quality ensemble prediction model for the urban water reservoir based on the hybrid long short-term memory (LSTM) network analysis","authors":"Kai He, Yu Liu, Jinlong Yuan, Zhidong He, Qidong Yin, Dongjian Xu, Xinfeng Zhao, Maochuan Hu, Haoxian Lu","doi":"10.2166/aqua.2024.099","DOIUrl":"https://doi.org/10.2166/aqua.2024.099","url":null,"abstract":"\u0000 \u0000 The water quality of drinking water reservoirs directly impacts the water supply safety for urban residents. This study focuses on the Da Jing Shan Reservoir, a crucial drinking water source for Zhuhai City and the Macau Special Administrative Region. The aim is to establish a prediction model for the water quality of drinking water reservoirs, which can serve as a vital reference for water plants when formulating their water supply plans. In this research, after smoothing the data using the Hodrick-Prescott filter, we utilized the long short-term memory (LSTM) network model to create a water quality prediction model for the Da Jing Shan Reservoir. Simulation calculations reveal that the model's fitting degree is consistently above 60%. Specifically, the prediction accuracy for pH, dissolved oxygen (DO), and biochemical oxygen demand (BOD) in the water quality prediction model aligns with actual results by more than 70%, effectively simulating the reservoir's water quality changes. Moreover, for parameters like pH, DO, BOD, and total phosphorus, the relative forecasting error of the LSTM model is less than 10%, confirming the model's validity. The results of this study offer an essential model reference for predicting water quality for the Da Jing Shan Reservoir.","PeriodicalId":513288,"journal":{"name":"AQUA — Water Infrastructure, Ecosystems and Society","volume":" 14","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141833337","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}
Syed Abbas Ali, Noor Muhammad Khan, Muhammad Kaleem Sarwar, Muhammad Waqas Zaffar, Atiq Ur Rehman Tariq, Ubaid Ullah, Yasir Abbas
A spillway is the essential part of the dam body, which releases surplus flows. At higher floods, the spillway operates at high heads, which results in high flow velocities along the chute and may cause negative pressures and cavitation. Therefore, to minimize such issues, aerators are provided along the spillway's chutes. This study aims to analyze the performance of the high-head overflow spillway of Mohmand Dam, Pakistan, having a steep chute of 32° with multiple aerators. Based on Froude's law of similitude, the physical model study was carried out at Irrigation Research Institute, Nandipur, on a scale of 1:60, while FLOW-3D numerical models were used to compare different hydraulic parameters, i.e., flow depth, velocity and pressure. The numerical models were validated with the results of a physical model, which were found in an acceptable range (i.e., 4.93%), and the hydraulic performance of two aerators was evaluated at different discharges. The models indicated negative pressures inside the aerator cavity, which allowed the suction of air to the lower nappe. The maximum air entrainment at the first aerator was about 8.5%. The results also showed that air entrainment to the lower nappe decreased when discharge was increased, whereas the maximum air detrainment reached 11.3% downstream of the second aerator.
{"title":"Hydraulic investigation of flows at high-head overflow spillway with multiple aerators: a physical and numerical study of Mohmand Dam, Pakistan","authors":"Syed Abbas Ali, Noor Muhammad Khan, Muhammad Kaleem Sarwar, Muhammad Waqas Zaffar, Atiq Ur Rehman Tariq, Ubaid Ullah, Yasir Abbas","doi":"10.2166/aqua.2024.180","DOIUrl":"https://doi.org/10.2166/aqua.2024.180","url":null,"abstract":"\u0000 A spillway is the essential part of the dam body, which releases surplus flows. At higher floods, the spillway operates at high heads, which results in high flow velocities along the chute and may cause negative pressures and cavitation. Therefore, to minimize such issues, aerators are provided along the spillway's chutes. This study aims to analyze the performance of the high-head overflow spillway of Mohmand Dam, Pakistan, having a steep chute of 32° with multiple aerators. Based on Froude's law of similitude, the physical model study was carried out at Irrigation Research Institute, Nandipur, on a scale of 1:60, while FLOW-3D numerical models were used to compare different hydraulic parameters, i.e., flow depth, velocity and pressure. The numerical models were validated with the results of a physical model, which were found in an acceptable range (i.e., 4.93%), and the hydraulic performance of two aerators was evaluated at different discharges. The models indicated negative pressures inside the aerator cavity, which allowed the suction of air to the lower nappe. The maximum air entrainment at the first aerator was about 8.5%. The results also showed that air entrainment to the lower nappe decreased when discharge was increased, whereas the maximum air detrainment reached 11.3% downstream of the second aerator.","PeriodicalId":513288,"journal":{"name":"AQUA — Water Infrastructure, Ecosystems and Society","volume":"6 8","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141648393","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}
Rapid urbanization and population growth driven by global tourism in cities such as Cancun, Playa del Carmen, Tulum, and Puerto Morelos, in Quintana Roo, are major stressors in the Yucatan Peninsula aquifer. As this aquifer is the main water source for all anthropic and socio-economic activities in the region, management conservation actions must be carefully established. Being a coastal aquifer, saline intrusion must be addressed and analyzed. However, there are scarce previous works in this regard for the region, making it difficult to incorporate these elements into territorial planning and adaptive groundwater management. This work uses free-access data to characterize the saline intrusion of aquifers on the Quintana Roo north coast through the processing, adaptation, and cartographic representation of the GALDIT index. This approach identified areas of the aquifer that could show saline intrusion, and later, these results were contrasted with the water supply zones of the main coastal cities of northern Quintana Roo. These results are a novelty approach for Quintana Roo and are hugely relevant at the regional level. In addition, they can be used as input to promote water management strategies and territorial planning.
{"title":"Saline intrusion assessment using the GALDIT index on the northern coast of Quintana Roo, Yucatan Peninsula, Mexico","authors":"Adriana Lucia Trejo-Albuerne, Cesar Canul-Macario","doi":"10.2166/aqua.2024.119","DOIUrl":"https://doi.org/10.2166/aqua.2024.119","url":null,"abstract":"\u0000 Rapid urbanization and population growth driven by global tourism in cities such as Cancun, Playa del Carmen, Tulum, and Puerto Morelos, in Quintana Roo, are major stressors in the Yucatan Peninsula aquifer. As this aquifer is the main water source for all anthropic and socio-economic activities in the region, management conservation actions must be carefully established. Being a coastal aquifer, saline intrusion must be addressed and analyzed. However, there are scarce previous works in this regard for the region, making it difficult to incorporate these elements into territorial planning and adaptive groundwater management. This work uses free-access data to characterize the saline intrusion of aquifers on the Quintana Roo north coast through the processing, adaptation, and cartographic representation of the GALDIT index. This approach identified areas of the aquifer that could show saline intrusion, and later, these results were contrasted with the water supply zones of the main coastal cities of northern Quintana Roo. These results are a novelty approach for Quintana Roo and are hugely relevant at the regional level. In addition, they can be used as input to promote water management strategies and territorial planning.","PeriodicalId":513288,"journal":{"name":"AQUA — Water Infrastructure, Ecosystems and Society","volume":"14 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141653715","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}
Epigallocatechin gallate (EGCG) is an exceptional plant polyphenol for drinking water disinfection, due to its lasting antibacterial capabilities and broad spectrum of health benefits. Nevertheless, its effectiveness and the underlying mechanisms against chlorine-resistant bacteria, such as Bacillus subtilis, have not been thoroughly explored under various water conditions. The study at hand probed the inactivation rates of EGCG on B. subtilis was subjected to different concentrations, contact times, acidic or basic environments, and temperatures; biological mechanisms were examined by analyzing alkaline phosphatase, proteins, glucose, ATP, and redox biomolecules. Results indicated a positive correlation between EGCG concentration and the inactivation rate of B. subtilis, with the rate notably rising at EGCG levels below 800 mg/l and under acidic pH. The inactivation efficiency increased with temperature increments from 25 to 45 °C. Moreover, EGCG exerted a detrimental impact on the structural integrity, energy metabolism, and the antioxidant defense system of B. subtilis showed a dose-dependent antimicrobial activity against Escherichia coli. Consequently, this study provides a strong foundation for evaluating EGCG's efficacy against chlorine-resistant bacteria, promoting its theoretical application for drinking water treatment and guiding methodological advancements for broader applications.
{"title":"Factors influencing the inactivation of Bacillus subtilis by epigallocatechin gallate (EGCG)","authors":"Cuimin Feng, Weiqi Yang, Tong Wei, Jing Li, Zexin Chen, Xue Yao","doi":"10.2166/aqua.2024.135","DOIUrl":"https://doi.org/10.2166/aqua.2024.135","url":null,"abstract":"\u0000 Epigallocatechin gallate (EGCG) is an exceptional plant polyphenol for drinking water disinfection, due to its lasting antibacterial capabilities and broad spectrum of health benefits. Nevertheless, its effectiveness and the underlying mechanisms against chlorine-resistant bacteria, such as Bacillus subtilis, have not been thoroughly explored under various water conditions. The study at hand probed the inactivation rates of EGCG on B. subtilis was subjected to different concentrations, contact times, acidic or basic environments, and temperatures; biological mechanisms were examined by analyzing alkaline phosphatase, proteins, glucose, ATP, and redox biomolecules. Results indicated a positive correlation between EGCG concentration and the inactivation rate of B. subtilis, with the rate notably rising at EGCG levels below 800 mg/l and under acidic pH. The inactivation efficiency increased with temperature increments from 25 to 45 °C. Moreover, EGCG exerted a detrimental impact on the structural integrity, energy metabolism, and the antioxidant defense system of B. subtilis showed a dose-dependent antimicrobial activity against Escherichia coli. Consequently, this study provides a strong foundation for evaluating EGCG's efficacy against chlorine-resistant bacteria, promoting its theoretical application for drinking water treatment and guiding methodological advancements for broader applications.","PeriodicalId":513288,"journal":{"name":"AQUA — Water Infrastructure, Ecosystems and Society","volume":"12 10","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141658623","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}
Moti Poudel, Subodh Sharma, A. Ghimire, Guy Howard, Adrian Flint, Manish Baidya, A. Nijhawan
Water supply schemes (WSSs) in Nepal are managed by water user committees with basic knowledge of climate change. The Government of Nepal has committed and prioritized improving the quality of water services by implementing climate-resilient water safety plans (CR-WSPs) in 10 WSSs. In this study, how tough water sanitation and hygiene (HTIW) framework was adopted to assess the effectiveness of these CR-WSPs, which include four groundwater and six protected springs-based WSSs. Employing the HTIW framework, this study adopted the six key indicators environment, infrastructure, management, community governance and engagement, institutional support, and supply chains to evaluate CR-WSPs effectiveness. The indicators were then assessed using a Likert scale. Resilient schemes are needed to demonstrate a capacity to respond effectively to challenges such as unforeseen extreme events and potential hazards, together with an aptitude for financial management, laboratory maintenance, and social inclusion. Less resilient schemes tend to be those linked to social inclusion or financial issues. Institutional support and supply chain domain scored four and were relatively strong among them. The findings of this study suggest that CR-WSPs can be an important metric tool to assess climate resilience and guide policymakers in low- and middle-income countries.
{"title":"Effectiveness of climate resilient water safety plans in Nepal","authors":"Moti Poudel, Subodh Sharma, A. Ghimire, Guy Howard, Adrian Flint, Manish Baidya, A. Nijhawan","doi":"10.2166/aqua.2024.309","DOIUrl":"https://doi.org/10.2166/aqua.2024.309","url":null,"abstract":"\u0000 Water supply schemes (WSSs) in Nepal are managed by water user committees with basic knowledge of climate change. The Government of Nepal has committed and prioritized improving the quality of water services by implementing climate-resilient water safety plans (CR-WSPs) in 10 WSSs. In this study, how tough water sanitation and hygiene (HTIW) framework was adopted to assess the effectiveness of these CR-WSPs, which include four groundwater and six protected springs-based WSSs. Employing the HTIW framework, this study adopted the six key indicators environment, infrastructure, management, community governance and engagement, institutional support, and supply chains to evaluate CR-WSPs effectiveness. The indicators were then assessed using a Likert scale. Resilient schemes are needed to demonstrate a capacity to respond effectively to challenges such as unforeseen extreme events and potential hazards, together with an aptitude for financial management, laboratory maintenance, and social inclusion. Less resilient schemes tend to be those linked to social inclusion or financial issues. Institutional support and supply chain domain scored four and were relatively strong among them. The findings of this study suggest that CR-WSPs can be an important metric tool to assess climate resilience and guide policymakers in low- and middle-income countries.","PeriodicalId":513288,"journal":{"name":"AQUA — Water Infrastructure, Ecosystems and Society","volume":"73 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141662814","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}
Amin Minaei, Soliman Abusamra, M. Hajibabaei, Dragan Savić, Aaron C. Zecchin, Enrico Creaco, R. Sitzenfrei
Phased planning for municipal infrastructure is based on the time-dependent status of multiple networks, which is in contrast to the traditional approach, where one-phase construction and a single status are considered for planning system activities. This study integrates and optimizes the corridor-wise intervention planning of water, sewer, and road networks where the number of equally long phases and intervention decisions are among the decision variables showing the extent to which phase number optimization can impact the cost and coordination of the interventions in interdependent systems. Optimizing the phase number for municipal infrastructure optimization within an evolutionary algorithm is a challenging task due to the evolutionary recombination between numerous planning solutions with different decision variable lengths. A multi-phase design and construction approach is developed for the rehabilitation of the system in a real case study in Montreal, Canada. The study involves 20 corridors in which a street section is co-located with water and sewer pipes. A metaheuristic single-objective optimization engine is employed to minimize the total net present value of intervention plan costs for the whole integrated system. The results show that phased optimization could bring about a 25% cost saving for the rehabilitation master plan and coordinated multi-systems intervention activities.
{"title":"Optimized phased planning for dynamic rehabilitation of integrated municipal infrastructure","authors":"Amin Minaei, Soliman Abusamra, M. Hajibabaei, Dragan Savić, Aaron C. Zecchin, Enrico Creaco, R. Sitzenfrei","doi":"10.2166/aqua.2024.083","DOIUrl":"https://doi.org/10.2166/aqua.2024.083","url":null,"abstract":"\u0000 \u0000 Phased planning for municipal infrastructure is based on the time-dependent status of multiple networks, which is in contrast to the traditional approach, where one-phase construction and a single status are considered for planning system activities. This study integrates and optimizes the corridor-wise intervention planning of water, sewer, and road networks where the number of equally long phases and intervention decisions are among the decision variables showing the extent to which phase number optimization can impact the cost and coordination of the interventions in interdependent systems. Optimizing the phase number for municipal infrastructure optimization within an evolutionary algorithm is a challenging task due to the evolutionary recombination between numerous planning solutions with different decision variable lengths. A multi-phase design and construction approach is developed for the rehabilitation of the system in a real case study in Montreal, Canada. The study involves 20 corridors in which a street section is co-located with water and sewer pipes. A metaheuristic single-objective optimization engine is employed to minimize the total net present value of intervention plan costs for the whole integrated system. The results show that phased optimization could bring about a 25% cost saving for the rehabilitation master plan and coordinated multi-systems intervention activities.","PeriodicalId":513288,"journal":{"name":"AQUA — Water Infrastructure, Ecosystems and Society","volume":"15 14","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141661419","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 conventional district metered areas (DMAs) bounded by closed valves reduce space of emergency response actions to cope with system failure or emergency events for resilience improvement. In order to improve the restorative capability of zoning water distribution system (WDS), a novel dynamic DMA optimization design method and a coupled emergency response strategy are proposed. A multi-level zoning method is applied to determine optimization of water source areas (WSAs), pressure management areas (PMAs), and dynamic DMAs. A coupled emergency response strategy of WDS zoning, valve closure, hydrant flushing, and dynamic DMA adjustment is proposed and validated in a real large-scale water distribution network. The results show that the coupled emergency response strategy based on dynamic DMA can enhance capacity for dynamic emergency response and improve resilience during contamination flushing.
{"title":"Multi-level dynamic zoning design to improve the restorative capability of resilience: An emergence response in water contamination flushing","authors":"Jun Liu, Hongpeng Wang, Qingzhou Zhang, Yunchang Wan, Dahai Zhao, Daoling Wei, Yukun Hou","doi":"10.2166/aqua.2024.212","DOIUrl":"https://doi.org/10.2166/aqua.2024.212","url":null,"abstract":"\u0000 \u0000 The conventional district metered areas (DMAs) bounded by closed valves reduce space of emergency response actions to cope with system failure or emergency events for resilience improvement. In order to improve the restorative capability of zoning water distribution system (WDS), a novel dynamic DMA optimization design method and a coupled emergency response strategy are proposed. A multi-level zoning method is applied to determine optimization of water source areas (WSAs), pressure management areas (PMAs), and dynamic DMAs. A coupled emergency response strategy of WDS zoning, valve closure, hydrant flushing, and dynamic DMA adjustment is proposed and validated in a real large-scale water distribution network. The results show that the coupled emergency response strategy based on dynamic DMA can enhance capacity for dynamic emergency response and improve resilience during contamination flushing.","PeriodicalId":513288,"journal":{"name":"AQUA — Water Infrastructure, Ecosystems and Society","volume":"109 23","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141665940","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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