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1. Produced water, money water, living water: Anthropological perspectives on water and fracking

   https://doi.org/10.1002/wat2.1272  

   de_Rijke, Kim (March 2018, WIREs Water)

   Advances in hydraulic fracturing (aka “fracking”) technologies and horizontal drilling have enabled the extraction of previously unviable unconventional oil and gas resources. However, as global environmental concerns have become more prominent and unconventional oil and gas developments have moved ever closer to residential centers, public scrutiny of the industry and its methods and impacts of extraction have increased. Water impacts feature prominently among the contemporary societal concerns about fracking. These concerns include the large water requirements of the process itself, as well as concerns about the potential pollution of groundwater and the (underground) environment more broadly. Anthropologists have undertaken qualitative field research on unconventional gas developments in a variety of settings, largely among local communities in regions of extraction. The perspectives employed by anthropologists are commonly drawn from the broader social science literature, including the anthropology of water and natural resources, science and technology studies, studies of social movements, and studies which examine the energy‐society nexus. Based on the shortcomings of the published anthropological accounts, interdisciplinary research collaboration with hydrologists, engineers and economists, as well as a more fulsome engagement with the variety of hopes, fears and dreams of fracking and unconventional gas, is recommended.WIREs Water2018, 5:e1272. doi: 10.1002/wat2.1272 This article is categorized under:Engineering Water > Sustainable Engineering of WaterScience of Water > Water QualityHuman Water > Methods 

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2. The role of water mobility on water-responsive actuation of silk

   https://doi.org/10.1038/s41467-024-52715-6  

   Podbevšek, Darjan; Jung, Yeojin; Khan, Maheen_K; Yu, Honghui; Tu, Raymond_S; Chen, Xi (September 2024, Nature Communications)

   Abstract Biological water-responsive materials that deform with changes in relative humidity have recently demonstrated record-high actuation energy densities, showing promise as high-performance actuators for various engineering applications. However, there is a lack of theories capable of explaining or predicting the stress generated during water-responsiveness. Here, we show that the nanoscale confinement of water dominates the macroscopic dehydration-induced stress of the regenerated silk fibroin. We modified silk fibroin’s secondary structure, which leads to various distributions of bulk-like mobile and tightly bound water populations. Interestingly, despite these structure variations, all silk samples start to exert force when the bound-to-mobile (B/M) ratio of confined water reaches the same level. This critical B/M water ratio suggests a common threshold above which the chemical potential of water instigates the actuation. Our findings serve as guidelines for predicting and engineering silk’s WR behavior and suggest the potential of describing the WR behavior of biopolymers through confined water. 

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3. Anomalous Adsorption of PFAS at the Thin‐Water‐Film Air‐Water Interface in Water‐Unsaturated Porous Media

   https://doi.org/10.1029/2023WR035775  

   Zhang, Wenqian; Guo, Bo (February 2024, Water Resources Research)

   Abstract Per‐ and poly‐fluoroalkyl substances (PFAS) are interfacially‐active contaminants that adsorb at air‐water interfaces (AWIs). Water‐unsaturated soils have abundant AWIs, which generally consist of two types: one is associated with the pendular rings of water between soil grains (i.e., bulk AWI) and the other arises from the thin water films covering the soil grains. To date, the two types of AWIs have been treated the same when modeling PFAS retention in vadose zones. However, the presence of electrical double layers of soil grain surfaces and the subsequently modified chemical potential of PFAS at the AWI may significantly change the PFAS adsorption at the thin‐water‐film AWI relative to that at the bulk AWI. Given that thin water films contribute to over 90% of AWIs in the vadose zone under many field‐relevant wetting conditions, it is critical to quantify the potential anomalous adsorption of PFAS at the thin‐water‐film AWI. We develop a thermodynamic‐based mathematical model to quantify this anomalous adsorption. The model couples the chemical equilibrium of PFAS with the Poisson‐Boltzmann equation that governs the distribution of electrical potential in a thin water film. Our model analyses suggest that PFAS adsorption at thin‐water‐film AWI can deviate significantly (up to 82%) from that at bulk AWIs. The deviation increases for lower porewater ionic strength, thinner water film, and higher soil grain surface charge. These results highlight the importance of accounting for the anomalous adsorption of PFAS at the thin‐water‐film AWI when modeling PFAS fate and transport in the vadose zone. 

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4. Moral economies for water: A framework for analyzing norms of justice, economic behavior, and social enforcement in the contexts of water inequality

   https://doi.org/10.1002/wat2.1627  

   Beresford, Melissa; Wutich, Amber; Garrick, Dustin; Drew, Georgina (December 2022, WIREs Water)

   Abstract Over the past two decades, scholars have invoked E. P. Thompson's and James Scott's concept of a “moral economy” to explain how people mobilize notions of justice to make claims to water. We draw together 20 years of literature to assess the state‐of‐the‐art present in research on moral economies for water. We trace the historical foundations of the moral economies concept and its relevance to water; define the three basic components of a moral economy for water—(1) shared understandings of justice, (2) normative economic practices, (3) social pressure mechanisms—and provide examples of how they manifest globally. We then discuss how moral economies for water can cycle through four basic states—balanced struggle, intensified reaction, mass revolt, and collapse and dissolution—at different scales. We also explore the implications of the moral economies framework for key areas of current research on water: water sharing, water commons, water markets, and biocultural outcomes, and discuss the ways in which the moral economies framework dovetails with recent advances in water research, especially the economics of water and development. We argue that the moral economies framework is a powerful explanatory tool for understanding the relationships between ideas of water justice, economic behaviors, and mechanisms of social enforcement that complements other methodological approaches and theoretical perspectives. We envision moral economies for water as a field that can facilitate a range of norm‐based analyses of economic behavior and water justice, including across scales—from local to global—and in broad, integrative, multiscalar, and cross‐disciplinary ways. This article is categorized under:Human Water > Water GovernanceHuman Water > Value of WaterHuman Water > Rights to Water 

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5. Extending traditional water supplies in inland communities with nontraditional solutions to water scarcity

   https://doi.org/10.1002/wat2.1543  

   Scruggs, Caroline E.; Heyne, Catherine M. (June 2021, WIREs Water)

   Abstract Urban communities around the world are grappling with the challenges associated with population increases, drought, and projected water shortages. With a substantial global shortfall between water supply and demand expected by 2030, water planning strategies must adapt to a new reality characterized by higher temperatures and less precipitation, requiring new ways of thinking about water management, use, and governance. Commonplace strategies such as water conservation and nonpotable water reuse might not be sufficient to adequately stretch water supplies in water‐scarce parts of the industrialized world. In the United States, planned potable water reuse (i.e., purification of domestic wastewater for reuse as drinking water) is emerging as a way forward to mitigate water shortages without significant changes to lifestyle, behavior, or infrastructure. But potable reuse is not the only solution: paradigm shifting and disruptive options that more holistically address water scarcity, such as composting toilets and market‐based approaches to water use, are also gaining traction, and they could be pursued alongside or instead of potable water reuse. However, these options would require more significant changes to lifestyles, behavior, infrastructure, and governance. While all of the options considered offer advantages, they each come with new concerns and challenges related to cost, public perception, social norms, and policy. The goal of this work is to consider a number of plausible solutions to water scarcity—partial and complete, traditional and disruptive—to stimulate forward‐looking thinking about the increasingly common global problem of water scarcity. This article is categorized under:Engineering Water > Sustainable Engineering of WaterEngineering Water > Planning Water 

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