{"title":"Preparing infrastructure for surprise: fusing synthetic network, interdependency, and cascading failure models","authors":"Ryan M Hoff, M. Chester","doi":"10.1088/2634-4505/acd07d","DOIUrl":"https://doi.org/10.1088/2634-4505/acd07d","url":null,"abstract":"Faced with destabilizing conditions in the Anthropocene, infrastructure resilience modeling remains challenged to confront increasingly complex conditions toward quickly and meaningfully advancing adaptation. Data gaps, increasingly interconnected systems, and accurate behavior estimation (across scales and as both gradual and cascading failure) remain challenges for infrastructure modelers. Yet novel approaches are emerging—largely independently—that, if brought together, offer significant opportunities for rapidly advancing how we understand vulnerabilities and surgically invest in resilience. Of particular promise are interdependency modeling, cascading failure modeling, and synthetic network generation. We describe a framework for integrating these three domains toward an integrated modeling framework to estimate infrastructure networks where no data exist, connect infrastructure to establish interdependencies, assess the vulnerabilities of these interconnected infrastructure to hazards, and simulate how failures may propagate across systems. We draw from the literature as an evidence base, provide a conceptual structure for implementation, and conclude by discussing the significance of such a framework and the critical tools it may provide to infrastructure researchers and managers.","PeriodicalId":309041,"journal":{"name":"Environmental Research: Infrastructure and Sustainability","volume":"46 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131829232","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}
{"title":"Policy approaches to mitigate in-use methane emissions from natural gas use as a marine fuel","authors":"Imranul I Laskar, A. Giang","doi":"10.1088/2634-4505/accf33","DOIUrl":"https://doi.org/10.1088/2634-4505/accf33","url":null,"abstract":"Unregulated in-use methane emissions (or methane slip) can reduce or even eliminate the overall climate benefits of using liquefied natural gas as a marine fuel. We conduct critical review and expert interviews to identify methane slip mitigation measures, and then identify and evaluate potential policy instruments that could incentivize their uptake while considering the shipping sector’s climate targets. We find that regulatory instruments are expected to perform the best across a range of criteria when they are at the global level, include methane on a CO2-equivalent and lifecycle basis, promote polycentric approaches to climate governance, and allow flexibility in how the industry incorporates decarbonization measures. Market-based approaches and informational governance policies complement regulatory instruments by improving cost-effectiveness and increasing the availability of relevant information on emissions mitigation. The urgency and scale of shipping climate targets underscore the need for policy approaches that support planning for long-term decarbonization pathways and that can avoid locking into fossil-carbon intensive systems.","PeriodicalId":309041,"journal":{"name":"Environmental Research: Infrastructure and Sustainability","volume":"227 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128993762","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}
{"title":"Temporal and spatial variability of energy intensity for atmospheric water generators","authors":"Anthony T Brenes, C. Chini","doi":"10.1088/2634-4505/accec9","DOIUrl":"https://doi.org/10.1088/2634-4505/accec9","url":null,"abstract":"Atmospheric water generators (AWGs) produce potable water from the moisture in the air, providing a potentially viable water source in austere locations or emergency response scenarios. In this study, the operating constraints of three existing commercially available AWG devices are investigated, compared to historical weather data from across the continental United States. Utilizing linear regression modeling and weather station data for the years of 1985–2019, the monthly and spatial trends of energy demand to produce water from these devices are estimated. Energy and water production efficiencies for the devices are highly dependent on environmental conditions with relative humidity (RH) and temperature as the two driving factors. Publicly available manufacturer specifications for each AWG system were modeled to predict yield and specific energy consumption (SEC). A spatial analysis depicts the change in SEC in kilowatt-hours per liter (kWh l−1) across the country at a monthly scale. SEC for refrigeration AWG ranged between 0.02 and 3.64 kWh l−1 and solar driven sorption was between 3.19 and 5.29 kWh l−1, significantly larger than conventional water treatment energy demands. Additionally, the results are synthesized based on the Köppen–Geiger climate classification system, to approximate projected water production and energy demand for each environment, with arid climates demanding larger energy consumption per unit volume of water produced. Excluding arid and cold climate classes, solar powered refrigeration devices have the potential to operate more efficiently than solar driven sorption due to advances in photovoltaic solar panel technology, but still require more energy than alternatives.","PeriodicalId":309041,"journal":{"name":"Environmental Research: Infrastructure and Sustainability","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133465737","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}
{"title":"Community-based water demand management: socio-technical strategies for improving water security in Australian Indigenous communities","authors":"C. Beal, Mike S. Bailey, M. Hohenhaus, M. Jackson","doi":"10.1088/2634-4505/accd16","DOIUrl":"https://doi.org/10.1088/2634-4505/accd16","url":null,"abstract":"Sustainable water management in remote Australian communities is a delicate balance between sufficient and acceptable supply options and appropriate and effective demand approaches. This paper focus on the evaluation of community-based water demand management strategies piloted in four remote Aboriginal and Torres Strait Island communities in Australia. Findings of the pilot demonstrate that from a systems perspective, community-based demand management centred around education and encouragement of residents to conserve and use water efficiently, provide greater opportunities for long-term sustainable water management outcomes that support building of social capital. To ensure truly transformative management outcomes, a toolbox of socio-technological strategies should be used including, where possible, smart metering of water consumption and use of water-efficient devices. A key element of this approach to demand management calls for a shift away from business-as-usual policy towards a flexible learning approach that involves genuine collaboration between water managers and Indigenous communities.","PeriodicalId":309041,"journal":{"name":"Environmental Research: Infrastructure and Sustainability","volume":"371 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126713580","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}
{"title":"Natural ventilation versus air pollution: assessing the impact of outdoor pollution on natural ventilation potential in informal settlements in India","authors":"Kopal Nihar, Alex Nutkiewicz, Rishee K. Jain","doi":"10.1088/2634-4505/acc88f","DOIUrl":"https://doi.org/10.1088/2634-4505/acc88f","url":null,"abstract":"Despite the proven benefits of natural ventilation (NV) as an effective low-carbon solution to meet growing cooling demand, its effectiveness can be constrained by poor outdoor air quality. Here, we propose a modeling approach that integrates highly granular air pollution data with a coupled EnergyPlus and differential equation airflow model to evaluate how NV potential for space cooling changes when accounting for air pollution exposure (PM2.5). Given the high vulnerability of low-income populations to air pollution and the dearth of energy and thermal comfort research on informal settlements, we applied our model to a typical informal settlement residence in two large Indian cities: New Delhi and Bangalore. Our results indicate that outdoor PM2.5 levels have a significant impact on NV potential especially in highly polluted cities like New Delhi. However, we found that low-cost filtration (MERV 14) increased the NV potential by 25% and protected occupants from harmful exposure to PM2.5 with a minor energy penalty of 6%. We further find that adoption of low-cost filtration is a viable low-carbon solution pathway as it provides both thermal comfort and exposure protection at 65% less energy intensity—energy intensity reduced to 60 kWh m−2 from 173.5 kWh m−2 in case of adoption of potentially unaffordable full mechanical air conditioning. Our work highlights ample opportunities for reducing both air pollution and energy consumption in informal settlements across major Indian cities. Finally, our work can guide building designers and policymakers to reform building codes for adopting low-cost air filtration coupled with NV and subsequently reduce energy demand and associated environmental emissions.","PeriodicalId":309041,"journal":{"name":"Environmental Research: Infrastructure and Sustainability","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128357073","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}
B. Choat, Amber Pulido, A. Bhaskar, R. Hale, Harry X. Zhang, T. Meixner, L. McPhillips, K. Hopkins, J. Cherrier, C. Cheng
{"title":"Assessing stormwater control measure inventories from 23 cities in the United States","authors":"B. Choat, Amber Pulido, A. Bhaskar, R. Hale, Harry X. Zhang, T. Meixner, L. McPhillips, K. Hopkins, J. Cherrier, C. Cheng","doi":"10.1088/2634-4505/acc759","DOIUrl":"https://doi.org/10.1088/2634-4505/acc759","url":null,"abstract":"Since the 1987 Clean Water Act Section 319 amendment, the US Government has required and funded the development of nonpoint source pollution programs with about $5 billion dollars. Despite these expenditures, nonpoint source pollution from urban watersheds is still a significant cause of impaired waters in the United States. Urban stormwater management has rapidly evolved over recent decades with decision-making made at a local or city scale. To address the need for a better understanding of how stormwater management has been implemented in different cities, we used stormwater control measure (SCM) network data from 23 US cities and assessed what physical, climatic, socioeconomic, and/or regulatory explanatory variables, if any, are related to SCM assemblages at the municipal scale. Spearman’s correlation and Wilcoxon rank-sum tests were used to investigate relationships between explanatory variables and SCM types and assemblages of SCMs in each city. The results from these analyses showed that for the cities assessed, physical explanatory variables (e.g. impervious percentage and depth to water table) explained the greatest portion of variability in SCM assemblages. Additionally, it was found that cities with combined sewers favored filters, swales and strips, and infiltrators over basins, and cities that are under consent decrees with the Environmental Protection Agency tended to include filters more frequently in their SCM inventories. Future work can build on the SCM assemblages used in this study and their explanatory variables to better understand the differences and drivers of differences in SCM effectiveness across cities, improve watershed modeling, and investigate city- and watershed-scale impacts of SCM assemblages.","PeriodicalId":309041,"journal":{"name":"Environmental Research: Infrastructure and Sustainability","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132027031","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}
{"title":"Greenhouse gas emissions embodied in electric vehicle charging infrastructure: a method and case study of Georgia, US 2021–2050","authors":"John Mulrow, E. Grubert","doi":"10.1088/2634-4505/acc548","DOIUrl":"https://doi.org/10.1088/2634-4505/acc548","url":null,"abstract":"Electric vehicle (EV) charging infrastructure buildout is a major greenhouse gas (GHG) mitigation strategy among governments and municipalities. In the United States, where petroleum-based transportation is the largest single source of GHG emissions, the Infrastructure Investment and Jobs Act of 2021 will support building a national network of 500 000 EV charging units. While the climate benefits of driving electric are well established, the potential embodied climate impacts of building out the charging infrastructure are relatively unexplored. Furthermore, ‘charging infrastructure’ tends to be conceptualized in terms of plugs and stations, leaving out the electrical and communications systems that will be required to support decarbonized and efficient charging. In this study, we present an EV charging system (EVCS) model that describes the material and operational components required for charging and forecasts the scale-up of these components based on EV market share scenarios out to 2050. We develop a methodology for measuring GHG emissions embodied in the buildout of EVCS and incurred during operation of the EVCS, including vehicle recharging, and we demonstrate this model using a case study of Georgia (USA). We find that cumulative GHG emissions from EVCS buildout and use are negligible, at less than 1% of cumulative emissions from personal light duty vehicle travel (including EV recharging and conventional combustion vehicle driving). If an accelerated EVCS buildout were to stimulate a faster transition of the vehicle fleet, the emissions reduction of electrification will far outweigh emissions embodied in EVCS components, even assuming relatively high carbon inputs prior to decarbonization.","PeriodicalId":309041,"journal":{"name":"Environmental Research: Infrastructure and Sustainability","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130519484","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}
L. S. Rathore, Danyal Aziz, Betelhem Demeke, M. Mekonnen
{"title":"Sustainability assessment of virtual water flows through cereal and milled grain trade among US counties","authors":"L. S. Rathore, Danyal Aziz, Betelhem Demeke, M. Mekonnen","doi":"10.1088/2634-4505/acc353","DOIUrl":"https://doi.org/10.1088/2634-4505/acc353","url":null,"abstract":"Transference of the embedded water, so-called virtual water, in the trade of crops among regions within a country is often neglected, leading to no information about the impacts on the water resources of exporting regions, especially if those regions are water-stressed or, worse, water-scarce. Virtual water trade, if not considered through the lens of sustainability, could lead to adverse effects on the water resources of an exporting region. Previous related studies have quantified virtual water trade among the states in the United States providing valuable insights; however, information for specific crop trade among counties, its water footprint (WF) at the county scale, the resultant virtual water flow among counties, and the sustainability assessment of those virtual water flows are lacking. In this study, we calculate the green and blue WF of cereal and milled grain products at the county level and then, using trade data, calculate the virtual water flows among the counties. Then, we assess the sustainability of the import by introducing unsustainable import fraction (UIF), which is the ratio of virtual water imported from water-scarce counties to that of total virtual water imported in the form of cereal and milled grains. Finally, we quantify the change in UIF from the 2007–2017 period. A few of the significant insights discovered through this analysis include: (i) most of the cereal and milled grains trade is occurring among neighboring counties; ii) one-third of US counties import 75% or more virtual water from water scarce regions; (iii) in 2017, Texas and Missouri were the largest importer and exporter, respectively; and (iv) the number of counties importing cereals and milled grains from water-scarce counties increased from 2007 to 2017. Recommendations on alleviating the negative effects of the unsustainable import of cereal and milled grain are provided toward the end of the discussion.","PeriodicalId":309041,"journal":{"name":"Environmental Research: Infrastructure and Sustainability","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132006884","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}
S. Ahamed, Chelsea Schelly, Kristin M. Floress, William Lytle, Holly Caggiano, C. Cuite, Charles Wallace, Ryan Cook, Rebekah Jarvis, R. Shwom, D. Watkins
{"title":"‘Being able to work has kept our life fairly constant:’ reconciling social practice models to assess the impact of (infra)structural inequities on household wellbeing during the COVID-19 pandemic","authors":"S. Ahamed, Chelsea Schelly, Kristin M. Floress, William Lytle, Holly Caggiano, C. Cuite, Charles Wallace, Ryan Cook, Rebekah Jarvis, R. Shwom, D. Watkins","doi":"10.1088/2634-4505/acc272","DOIUrl":"https://doi.org/10.1088/2634-4505/acc272","url":null,"abstract":"Social practice theory offers a multidisciplinary perspective on the relationship between infrastructure and wellbeing. One prominent model in practice theory frames systems of provision as the rules, resources, and structures that enable the organization of social practices, encompassing both material and immaterial aspects of infrastructures. A second well-known model frames social practices in terms of their constituent elements: meanings, materials, and competences. Reconciling these two models, we argue that household capacity to respond to shifting systems of provision to maintain wellbeing is profoundly tied to the dynamics of privilege and inequity. To examine these dynamics, we propose a new analytical tool utilizing the Bourdieuian conceptualization of forms of capital, deepening the ability of social practice theory to address structural inequities by re-examining the question of who is able to access specific infrastructures. To illustrate this approach, we examine how households adapted to shifting systems of provision during the COVID-19 pandemic. Using data from 183 households in the Midwestern United States, we apply this tool to analyze adaptations to disruptions of multiple systems of provision, including work, school, food, and health, from February 2020 to August 2021. We highlight how household wellbeing during the pandemic has been impacted by forms of capital available to specific households, even as new social practices surrounding COVID-19 prevention became increasingly politicized. This research provides insight into both acute challenges and resilient social practices involving household consumption, indicating a need for policies that can address structural inequities across multiple systems of provision.","PeriodicalId":309041,"journal":{"name":"Environmental Research: Infrastructure and Sustainability","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114711157","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}
Arjun Thangaraj Ramshankar, Aditya Girish Desai, Julien Artur De La Villarmois, Joe Frank Bozeman III
{"title":"Sustainability analysis of overhead cable line powered freight trucks: a life cycle impact and techno-economic assessment toward transport electrification","authors":"Arjun Thangaraj Ramshankar, Aditya Girish Desai, Julien Artur De La Villarmois, Joe Frank Bozeman III","doi":"10.1088/2634-4505/acc273","DOIUrl":"https://doi.org/10.1088/2634-4505/acc273","url":null,"abstract":"We must move toward electrification of the transportation sector to help mitigate the adverse impacts of climate change. Carbon emission reduction in long-haul freight transport should be developed and administered given it accounts for 22% of transportation related emissions worldwide. Although electrified transport can make tail-pipe vehicle carbon emissions negligible, it does not mean that the entire system that supports electrified transport is carbon-neutral. We address this latter point in the present study by conducting a cradle-to-grave life cycle assessment of long-haul electric trucks that are powered by overhead cable lines (OCL). The environmental impacts were compared with those of battery electric vehicle trucks (BEV), and conventional diesel-powered trucks. The techno-economic analysis of long-haul freight OCL technology was conducted based on data from pilot-scale studies in Germany. The feasibility of implementing this technology in other countries was examined by comparing environmental impacts across respective electricity mixes. Results show that the environmental and economic impacts of OCL technology depends on the adoption percent. After analyzing different adoption rate scenarios, OCL adoption was found to be economically and environmentally beneficial at the 10% adoption rate or higher. We also found that use phase electricity accounts for over 83% of the net greenhouse gas emissions, thereby making the electricity mix powering this technology a determining factor for implementation around the world. Across their life cycles, the carbon footprint of both OCL and BEV was 2.5 times lesser than that of the conventional truck. Other findings reveal adaptable methods, a unique environmental-to-economic ratio measure, and equity considerations that can be leveraged for immediate decision-making activities and future studies alike.","PeriodicalId":309041,"journal":{"name":"Environmental Research: Infrastructure and Sustainability","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127594251","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}