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Open research questions in Water-Energy-Food Nexus Studies

56 unresolved questions extracted from the limitations and future-work sections of 555 Water-Energy-Food Nexus Studies papers in our library. Each links back to the study that raised it.

What the literature leaves open

  • Addressing global water scarcity. Mitigating the risks of maladaptation in the expansion of wastewater treatment and desalination. Balancing energy demand and CO2 emissions with the need for reliable and sustainable water supply.

    Future trends of desalination and wastewater treatment accounting for risks of maladaptation · 2026 · DOI

  • Raising awareness about water as a critical and limited resource. Promoting global responsibility and sustainable development. Evaluating the impact of education projects on sustainable development and global responsibility.

    BlueMind - Water Literacy for a Sustainable Future · 2026 · DOI

  • Water scarcity in Türkiye. Increasing pressure on the environment due to tourism. The need for sustainable water management in the tourism sector.

    Calculating the Water Footprint in Turkish Tourism: An Input-Output Model Analysis · 2026 · DOI

  • Bridging the gap between renewable energy technologies and successful on-farm implementation. Adapting to diverse agricultural contexts. Ensuring continuous refinement through practitioner experience and operational feedback.

    Practitioner Framework for Context-Specific Decentralized Agricultural Energy Deployment: Implementation Methodology for Irrigation-Dependent Farms · 2026 · DOI

  • The need for improving cooling efficiency and sustainability in data centres. The lack of understanding of the relationship between cooling technologies and water consumption.

    A Review of Thermal Management in Modern Data Centres: Water Usage Effectiveness and Heat Transfer Coefficients · 2026 · DOI

  • Climate variability. Groundwater depletion. Lack of infrastructure. Limited community ownership and poor maintenance practices.

    Climate-Resilient Rural Water Supply Systems in India: Integration of Sustainability, Smart Infrastructure, and Water Security under Jal Jeevan Mission · 2026 · DOI

  • Future research should focus on validating the framework across different crisis scenarios and examining the sensitivity of results to operational and logistical priority changes.

    Logistical challenges and strategies for drinking water supply in times of crisis · 2026 · DOI

  • The study had a limited sample size. The interventions were not highly effective, suggesting that compensatory behaviors may have offset their impact. The study did not account for differential utility costs and rate structures.

    Attempts to promote residential water conservation with educational, behavioral and engineering strategies · 1983 · DOI

  • Few studies have addressed water conservation, and even fewer have compared the impact of different approaches. The application of educational, behavioral, and engineering techniques to water conservation is rare.

    Attempts to promote residential water conservation with educational, behavioral and engineering strategies · 1983 · DOI

  • The study has a limited sample size of 98 households in Ames, Iowa. The study focuses on homeowning households and excludes renters and mobile home occupants due to limitations in water metering data. The study acknowledges that it would be out of order to claim to have done a complete study of water use in Ames without including renters and mobile home occupants.

    Attitudinal and Behavioral Responses to Drought-Induced Water Rationing · 1983 · DOI

  • Future research should focus on examining the long-term effects of drought-induced water rationing on water conservation behaviors. Future research should investigate the effectiveness of targeted conservation efforts that take into account household characteristics and demographics.

    Attitudinal and Behavioral Responses to Drought-Induced Water Rationing · 1983 · DOI

  • Conclusion This study aimed to investigate the multifaceted determinants of FOS in ASEAN countries by leveraging a comprehensive set of variables, including supply chain digitalization, government effectiveness, carbon emissions, and cleaner energy transition, over a robust panel spanning the period from 2000 to 2023. Using advanced econometric methodologies that address endogeneity, heterogeneity, and crosssectional dependence, the research presents nuanced empirical evidence that sheds light on the complex interplay among technological, institutional, and environmental factors shaping agricultural outcomes in the region.

    Carbon emission and food security nexus in the ASEAN region: exploring digitalization, good governance and energy transition dynamics · 2026 · DOI

  • The mismatch between reservoir operations and water allocation. Limited coordination between upstream reservoir operations and downstream water demands. The need for more flexible and adaptive governance approaches.

    The evolution of emergency river basin management in Brazil: a focus on water and energy · 2026 · DOI

  • The study may be limited by its focus on Brazil's national resolution database. The centralized governance approach has limitations in long-term adaptation.

    The evolution of emergency river basin management in Brazil: a focus on water and energy · 2026 · DOI

  • Conclusions 1. Study presents a methodological breakthrough by refining the analytical framework: integrating the XGBoost machine learning model with the SHAP interpretation tool overcomes the limitations of traditional linear analysis. This approach captures the complex nonlinear relationships governing marine carbon sink drivers while addressing the “black box” issue of machine learning by quantifying each factor’s contribution. It establishes a new paradigm for precisely deciphering marine carbon sink drivers, thereby enriching the theoretical and methodological systems for assessing marine carbon sink potential. 2. Core drivers identified to enhance marine carbon sink potential forecasting accuracy: The study precisely pinpoints the number of nature reserves (NPA), marine aquaculture area (MA), and total wastewater discharge (TWD) as core drivers of marine carbon sinks. Scenario simulations based on ecological thresholds for each factor, alongside relevant policy documents and practical case studies, reveal the developmental trajectory of China’s coastal marine carbon sink potential over the next decade, providing scientific grounds for targeted policy interventions. 3. Multi-scenario simulations for 2023–2032 indicate a hierarchical carbon sink pattern: GP > BAU > EP. GP exhibits a “highlevel decline followed by mid-term stabilisation”, while EP shows an initial 13.4% reduction before recovery. Regional heterogeneity is pronounced: the Northern Economic Zone exhibits “EP≈BAU>GP” (dominated by marine aquaculture), the Eastern Economic Zone shows “GP leading, EP declining” (dominated by urbanisation rates), while the Southern Economic Zone demonstrates “GP as optimal and stable” (dual-core driven by marine aquaculture and water temperature, with GP achieving an average annual carbon sink of 2.021 million tonnes of carbon). These findings may guide carbon sink management for China’s coastal regions (comprising the Bohai, Yellow, East China, and South China Seas, totalling 4.73 million square kilometres), while the methodology may serve as a reference for coastal nations globally. 6.2 Policy recommendations 6.2.1 Implement a coordinated, regionallydifferentiated governance framework with highsensitivity parameter prioritization Sensitivity analysis (Table 10) identifies marine aquaculture area (MA) and number of protected areas (NPA) as highly sensitive parameters (|PSC| > 1), indicating that small relative changes in these variables induce proportionally larger effects on marine carbon sink capacity. Therefore, their regulation should prioritize monitoring accuracy and policy controllability. Specifically, MA should be maintained within the empirically derived threshold range of 140,000–550,000 mu (Figure 5B), and NPA should be expanded to at least 83 protected areas per province. Meanwhile, total wastewater discharge (TWD) operates near the lower limit of the “carbon sink promotion window” (210,000–250,000 tonnes), implying that blind emission reductions could paradoxically suppress carbon sequestration; interval-based flexible management should thus replace one-size-fits-all reduction targets. Northern Economic Circle. Given the dominance of heavy industry, green interventions must avoid direct conflict with existing industrial structures.

    China’s marine carbon sink capacity assessment and potential projection: a machine learning approach · 2026 · DOI

  • TABLE 11 Multifactorial disturbance uncertainty interval. should be acknowledged. A particular year BAU median 90% confidence interval 2023 2028 2032 346.05 326.06 319.78 [342.91, 349.81] [286.70, 357.02] [278.57, 353.56] CV (%) 0.64 6.13 7.15 1. Uncertainties in carbon sink accounting. The carbon se- questration coefficients for mangroves, salt marshes, seagrass beds, and mariculture organisms are derived from literature and national standards but exhibit substantial spatial and temporal variability. The use of fixed coefficients may introduce systematic biases.

    China’s marine carbon sink capacity assessment and potential projection: a machine learning approach · 2026 · DOI

  • The current solid waste management practices in Onitsha are inadequate and contribute to environmental pollution and health risks. There is a need for a holistic approach to addressing solid waste management in Onitsha.

    Deploying a Water-Energy-Food (WEF) Nexus approach to design sustainable solid waste management in Onitsha, Nigeria · 2026 · DOI

  • The successful application of PCA and AHP demonstrates their capability to synthesize diverse community and expert perspectives—an approach that can be replicated across other Nigerian and West African cities where empirical data remain limited.

    Deploying a Water-Energy-Food (WEF) Nexus approach to design sustainable solid waste management in Onitsha, Nigeria · 2026 · DOI

  • Despite the growing deployment of solar photovoltaic water pumping systems (SPVWPS), little is known about how the institutional framework shapes SPVWPS effectiveness for productive agricultural use in rural Tanzania.

    A Systems Thinking Analysis of Institutional Frameworks Governing the Energy–Water Nexus for Productive Agricultural Activities in Rural Tanzania · 2026 · DOI

  • Limited research incorporates all aspects of rural water security framework in India. Existing studies rely on descriptive assessments and policy evaluations without developing measurable indicators.

    Climate-Resilient Rural Water Supply Systems in India: Integration of Sustainability, Smart Infrastructure, and Water Security under Jal Jeevan Mission · 2026 · DOI

  • The study is based on a small sample of 80 farming households. The study area is limited to the Rajshahi district of Bangladesh.

    Exploring the water-energy-food nexus among farming households in northern Bangladesh · 2026 · DOI

  • There is a lack of understanding of the WEF nexus at the farming household level. There is a need to investigate the impact of energy costs on food expenditure.

    Exploring the water-energy-food nexus among farming households in northern Bangladesh · 2026 · DOI

  • The need for a comprehensive evaluation of the AI4Gov tools. The need for a detailed analysis of the use cases and features developed in the context of AI4Gov.

    Specification of UC Scenarios and Planning of Integration and Validation Activities V3 · 2026 · DOI

  • Future research should focus on improving governance and strategic investment in decentralized wastewater treatment infrastructure. Further studies can explore the application of the HELP-WSI framework in other urban watersheds.

    Assessing urban watershed sustainability in the Rio Blanco basin (Mexico) using the HELP—WSI framework · 2026 · DOI

  • The study identifies a gap in urban watershed sustainability assessment and management. The gap is attributed to inadequate wastewater treatment infrastructure and poor governance.

    Assessing urban watershed sustainability in the Rio Blanco basin (Mexico) using the HELP—WSI framework · 2026 · DOI

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56 open questions have been extracted from the limitations and future-work passages of 555 Water-Energy-Food Nexus Studies papers in our library. Each one below links back to the study that raised it, so you can read the original claim in context.

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