Water Security Research Articles

Priority areas for the use of solar water disinfection (SODIS) in Brazil: a spatial approach

ABSTRACT This paper presents a methodology for the development of a potential and priority use map for the application of the solar water disinfection (SODIS) method in Brazil. The assessment of solar radiation was conducted, with a particular focus on the annual average global horizontal irradiance (GHI). The water vulnerability index (WVI) and the economic-social-ecosystemic (ESE)-WVI were developed and employed as indicators to define the priority regions for the application of SODIS. The combination of the GHI and WVI maps yielded a SODIS usage potential index (SUPI). The combination of the SUPI map with information pertaining to the human, economic, and ecosystem dimensions of water vulnerability (ESE-WVI) yielded the SODIS usage priority index. The analysis revealed that the country exhibits favorable levels of solar radiation, making the implementation of SODIS a viable option, particularly in the Northeast region. Furthermore, the study identified regions with greater water vulnerability, such as the semi-arid region and some parts of the Amazon, as priorities for the application of SODIS. In conclusion, SODIS represents a viable water treatment technique for various regions in Brazil, particularly those with abundant solar radiation and concerns regarding water security.

Mitigating the Impact of Climate Change on Public Health: Strategies for Resilience

This article examines the impact of climate change on public health and explores strategies for building resilience to mitigate its adverse effects. Climate change, through rising temperatures, extreme weather events, and shifting ecosystems, poses significant challenges to global public health, exacerbating health issues such as heat-related illnesses, vector-borne diseases, respiratory conditions, and food and water insecurity. Vulnerable populations, including the elderly, low-income communities, and those in developing regions, are disproportionately affected. This study reviews the current scientific literature on the health impacts of climate change and identifies key strategies for enhancing public health resilience. These strategies include the development of early warning systems, strengthening healthcare infrastructure, improving access to clean water and sanitation, and fostering community-based adaptation initiatives. Additionally, it highlights the importance of cross-sectoral collaboration between governments, public health agencies, and civil society in addressing climate-related health risks. The role of policy frameworks, such as integrating climate adaptation into public health planning and promoting sustainable practices, is also discussed. Case studies from countries with proactive climate health strategies provide insights into successful resilience-building efforts. The findings suggest that a comprehensive, proactive approach to climate change mitigation and adaptation can significantly reduce public health vulnerabilities and enhance community resilience. The article concludes by recommending targeted investments in public health infrastructure, education, and policy reform to safeguard communities from the growing health threats posed by climate change.

Impacts of climate change on urban stormwater runoff quantity and quality in a cold region

Climate change poses significant challenges to urban environments affecting both flood risks and stormwater pollutant loadings. However, studies on variations in stormwater runoff quantity and quality in cold regions, which are highly sensitive to climate change, are notably limited. Integrating climatic, hydrologic, and hydraulic modelling, the study assesses the potential impacts of climate change on stormwater runoff volume and pollutant dynamics in a Canadian urban watershed (Calgary). A two-year field program was conducted to support the calibration and validation of the Storm Water Management Model (SWMM). Intensity–duration–frequency curves were employed to evaluate the impacts of climate change on peak flow rate and flooding duration. In addition, typical dry, average, and wet years were applied to continuously simulate stormwater runoff quantity and quality during the 2050s and 2080s. The results suggest substantial increases in peak flow rates and flooding durations, particularly for the 5-year return period rainfall, with 1-h, 4-h, and 24-h peak inflow rates increasing by 74.3% (170.7%), 89.2% (158.4%), and 64.1% (102.8%) in the 2050s (2080s) Furthermore, the runoff quantity is projected to rise by 2.4–10.2% in the 2050s and 11.8–17.5% in the 2080s. Total suspended solids (TSS), total nitrogen (TN), and total phosphorus (TP) loadings are anticipated to increase by 2.0–36.1%, 3.1–21.4%, and 4.1–20.7%, respectively. As a result, the current stormwater system could overload and stormwater quality is likely to deteriorate under the impact of climate change. The findings are beneficial for cold regions to develop adaptive strategies that enhance urban water security and environmental sustainability under climate change.

Analysis of changes in river connectivity during the urbanization process: a case study of the southeastern plain of Yinzhou, China.

Affected by human activities, the naturally occurring river network in the southeastern plain of Yinzhou has gradually evolved into a natural-artificial composite water system, and changes in river connectivity due to changes in river network systems have caused water security problems, including urban flooding. To clarify the river connectivity change and its relationship with the urbanization process, this paper discusses an evaluation method for river connectivity based on complex networks and cellular automata (CA) from the perspective of complex systems, quantitatively analyzes the spatial-temporal characteristics of the structural and functional river connectivity in the study area during the 1990s-2020s, and reveals the impact of river nodes and chains on the connectivity level under the disturbance of natural or human factors. The results contained the following revelations: ① River connectivity showed a decreasing trend in the initial and rapid development stages of urbanization from the 1990s to the 2010s and a limited increasing trend in the optimization and upgrading stages from the 2010s to the 2020s. ② River network degradation and ongoing connectivity decline are found in the northeastern part of the study area. The highest river connectivity exists in Dongqianhukaifaqu. ③ The number of river nodes and chains should be maintained at approximately 80% for normal river connectivity. The nodes of high degree in the inflow area are listed in the key protection areas. ④ Changes in river connectivity are significantly correlated with the urbanization process. Changes in the functional connectivity level affect the magnitude of a flood. This study provides a theoretical basis for river network connectivity improvement and flood prevention in plain areas.

Food intake in an Australian Aboriginal rural community facing food and water security challenges: A cross-sectional survey.

Researchers were invited by Aboriginal leaders to collaborate on this study which aimed to assess food intake in the Walgett Aboriginal community to inform long-term community-led efforts to improve food and water security and nutrition. Aboriginal adults living in or near Walgett, a remote community in north-west NSW, Australia, completed an adapted Menzies Remote Short-item Dietary Assessment Tool, which was administered verbally and face-to-face in early 2022. Aboriginal people were involved in the survey design, training and collection, and analysis of data. Descriptive statistics were tabulated, overall and by gender, age, and location. Differences by sex, age group (18-44 years versus ≥45 years), and location (Walgett town or other) were determined using a chi-square test. A total of 242 participants completed the survey; 55% were female. Three-quarters of participants reported meeting the recommendations for discretionary foods (73%); however, more than half (56%) exceeded the recommended maximum serves of sugar-sweetened beverages. The proportion of participants meeting core food group guidelines was 72% for meat, 36% for fruit, 20% for bread and cereals, 6% for dairy, and 3% for vegetables. Overall, none of the participants met the recommended serves of all food groups outlined in the Australian Dietary Guidelines. Findings show that Walgett Aboriginal community members surveyed were consuming a healthier diet than national data reported for Aboriginal and Torres Strait Islander people in Australia. However, none of the participants were meeting all of the national dietary guidelines, placing them at increased risk of diet-related chronic disease. Local Aboriginal community-led efforts to improve food and water security should include specific strategies to improve nutrition.

THE SOCIAL DIMENSIONS OF CLIMATE CHANGE IN VIET NAM

Global trends in inequality and climate change are closely related. The poorest and most vulnerable individuals suffer the worst effects of climate change while making the smallest contributions to the situation. Millions of people who are vulnerable are being hit disproportionately hard by the effects of climate change, including extreme weather, health issues, food, water, and livelihood security, migration and forced displacement, loss of cultural identity, and other threats. Children, people with disabilities, ethnic minorities, older people, and other socially marginalized groups are some social groups that are particularly vulnerable to crises. Their geographic locations, financial, socioeconomic, cultural, and gender statuses, as well as their access to resources, services, decision-making authority, and justice, are the core reasons of their vulnerability. The paper presents some of the social dimensions of climate change in Viet Nam, including its impacts on migration, various vulnerable subjects, human rights, health, and businesses. Comments, discussions, and suggestions have also been provided in this paper.

Global-scale water security and desertification management amidst climate change.

Deserts and semi-arid environments are habitats torare species, rich cultural heritage, and essential ecological processes. Approximately 46% of the world's surface area is covered by drylands (arid, semi-arid, and dry sub-humid areas), where 3 billion people live and unfortunately witness water insecurity and desertification implications. In this context, the present study argued that reduced dryland ecosystem services and decreased ecosystem health have resulted from the individual and compounding impacts of desertification, water scarcity, and climate change. At 1.5°C, 2°C, and 3°C of global warming, under the shared socio-economic pathway SSP2, the number of people living in drylands who will be affected by various effects on water, energy, and land sectors is projected to reach 951 million, 1152 million, and 1285 million, respectively. Due to combinations of land use change, rainfall variations, fire suppression, and CO2 fertilization, as well as unsustainable management, widespread woody encroachment has occurred in many shrublands and savannas in Africa, Australia, North America, and South America. This hasaltered biodiversity and reduces ecosystem services, such as water availability and grazing potential. The north side of the Mediterranean, southern Africa, and North and South America are projected to have the most semiarid expansion. Contrarily, drylands are expected to shrinkin India, northern China, eastern equatorial Africa, and the southern Sahara. Growing research evidence highlights the adoption of policy frameworks deriving the solutions from soil land management (SLM), indigenous and local knowledge (ILK), early warning systems coupled with adaptation and mitigation responses, and targets of sustainable development goals (SDGs).

Dams, dams and more dams: Issues in evaluating business cases for dam expansion in Australia

Abstract Conventional interventions for mitigating flood risk and increasing water security often focus on large-scale engineering solutions despite evidence of significant cost overruns and negative environmental impacts. This study is an example of participatory research in water economics, motivated (and requested) by concerns from downstream communities and Indigenous stakeholders that impacts of a proposed dam upgrade and storage increase were not adequately considered. We reviewed the preliminary benefit-cost analysis (BCA) of the proposed AUD$2.1 billion investment to expand the Wyangala Dam in Australia and conducted a new BCA incorporating downstream community perspectives. The original economic analysis favoured the proposed investment, but it underestimated costs and overestimated benefits. Our economic analysis was complemented with a qualitative analysis of downstream community perspectives, plus a quantitative analysis indicating that project costs were underestimated by a minimum of 116%. In comparison, benefits were overestimated by 56%. Neglecting the potential impact of climate change also severely overestimated the original benefit-cost ratio. Based on our calculations, expanding the dam was unlikely to yield a net social benefit. In 2023, a new government decided the dam expansion was too expensive. We recommend policymakers prioritise independent evaluations and community engagement for BCAs on large-scale water infrastructure projects to ensure equitable investment decisions that maximise social welfare and adequate environmental assessment.

Inequalities in Water Insecurity in Kenya: A Multidimensional Approach

Water insecurity is a global concern likely to be compounded by increases in population and climate change. Existing water insecurity measurement methods capture multidimensional deprivation only at regional or sub-regional levels. Such estimates do not capture heterogeneous household experiences of water supply, proximity to water sources and affordability, which can vary substantially from regional averages. Accurate measurement requires a method that captures the incidence and intensity of a household’s simultaneous deprivation in dimensions of water accessibility, affordability, sufficiency and safety. We propose such a method and assess related inequalities using an approach analogous to the Alkire–Foster methodology for multidimensional poverty. Using household-level data from the Kenya Integrated Household Budget Survey 2015/16, we find that 63% of the Kenyan population experience multiple deprivation in water access. The dimensions of water affordability and sufficiency contribute most to multidimensional water insecurity, highlighting the need to ensure an adequate supply of affordable water. Disparities by household place of residence, dwelling type, and socio-economic status are evident. The estimates of multidimensional water insecurity are robust to different deprivation and poverty cutoffs. Our analysis is an invitation to rethink water insecurity metrics, allowing water deprivation to be measured more frequently and with greater precision to understand its impact clearly.

Sustainable Business Models: An Empirical Analysis of Environmental Sustainability in Leading Manufacturing Companies

This study thoroughly investigates the role of sustainable business models in enhancing environmental sustainability in leading manufacturing companies. Guided by the United Nations Sustainable Development Goals (SDGs), we empirically analyse the integration of sustainability goals into corporate strategies. This study identifies sustainable business models based on an analysis of the sustainability reports published on the website, examining the strategies and action plans declared by 30 companies that are leaders in the sustainability industry, according to their Dow Jones Sustainability Index World (DJSI World) and S&P Global ESG Scores. The strategies considered are aligned with the following specific sustainability development goals: 6 (water security); 7 (renewable energy); 12 (responsible consumption and production); and 13 (climate action). The dataset contains several variables, each reflecting a particular facet of a company’s environmental sustainability, as follows: energy consumption; greenhouse gas emissions; waste management strategies; and water conservation initiatives. We use a multidimensional data analysis technique called multiple correspondence analysis (MCA). After using MCA, we use a hierarchical clustering algorithm with the aim of classifying the different companies. Our findings underscore the presence of seven clusters of companies. Compared to the well-established literature on the topic of sustainable business, the innovative contribution of this study is linked to the identification of reaction time as a strategic variable explaining the different sustainable business models. The study makes it clear that the different business models are linked to reaction time to strategic alignment with environmental objectives. The country in which the company is based is also important. This study provides practical insights for companies aiming to align their practices with SDGs. In fact, the time variable provides important information in this regard and makes it possible to identify different approaches to sustainability as well as strong and weak sustainable business models; the former are characterised by a medium long-term strategic orientation towards environmental sustainability, which can be interpreted as the desire to undertake more solid and structured environmental sustainability strategies.

Examining Trends in the Food–Energy–Water Security Nexus and Its Relationships with Human Development, Population Growth, and Conflict

Abundant and accessible food, energy, and water are essential to the functioning of human societies and individual health and happiness. However, growing populations, intensifying climate change, and violent instability undermine resource security. We used data from the recently updated Pardee RAND Food–Energy–Water (FEW) Index and the INFORM risk model to assess global and regional trends in resource security and relationships with the Human Development Index (HDI), internal conflict risk, and population growth. Our analysis finds that resource security has modestly improved with an average global FEW Index improvement of 2.61%, but this figure masks significant regional disparities, with several countries in Sub-Saharan Africa and South Asia regressing in terms of food and water security. We observe continued high correlations between HDI and the FEW Index (0.8664) and also find the FEW Index to be highly correlated with national income per capita (0.6547). We also find that at a global level, there is a significant negative association between trends in the FEW Index and population growth (−0.4724) during the study period, suggesting that a growing proportion of the global population is experiencing resource insecurity. Finally, our analysis suggests that several resource-insecure countries are also conflict-prone and these nations tended to do worse over the study period than similarly resource-insecure states that were internally stable.

Detection and Measurement of Bacterial Contaminants in Stored River Water Consumed in Ekpoma

This study was conducted in Ekpoma, a town dependent on rainwater and river water from nearby areas because of a lack of groundwater sources, and the physicochemical and bacteriological (heterotrophic plate count [HPC], total coliform count [TCC], and fecal coliform count [FCC]) properties of 123 stored river water samples grouped into five collection districts (EK1 to EK5). The results were compared with regulatory standards and previous regional studies to identify water quality trends. While most physicochemical properties met drinking water standards, 74% of samples had pH values > 8.5. Twenty-seven samples were fit for drinking, with EK4 having the highest number of bacterio-logically unsuitable samples. Ten bacterial species were identified, with Gram-negative short-rod species such as Escherichia coli, Klebsiella pneumoniae, and Salmonella typhimurium being predominant. HPC values varied from 367 × 10⁴ to 1320 × 10⁴ CFU/mL, with EK2 (2505 × 10⁴ CFU/mL) and EK5 (1320 × 10⁴ CFU/mL) showing particularly high counts. The TCC values ranged from 1049 × 10⁴ to 4400 × 10⁴ CFU/mL, and the FCC values from 130 × 10⁴ to 800 × 10⁴ CFU/mL, all exceeding WHO limits (1.0 × 102 CFU/mL). Historical data show no improvement in water quality, emphasizing the need for individuals to treat water properly before consumption. The findings provide baseline data for local water authorities and serve as a wake-up call for adequate water treatment, storage interventions, and community education on water security. Additionally, this study offers a practical process for improving the quality of water stored in similar regions.

Climate‐resilient irrigation: Essential changes to balance food production and water security on a livable planet

AbstractClimate‐resilient irrigation is a necessity for sustainable development, aligning with broader goals of poverty alleviation, food security and environmental stewardship. By embracing adaptive strategies and fostering collaborative efforts, communities can navigate the challenges posed by a changing climate, safeguarding livelihoods and ecosystems. Climate‐resilient irrigation can improve coping measures and build resilience for communities through pathways which help improve agriculture. The relationship between agriculture, irrigation, water resources and climate change calls for an evolution of traditional irrigation practices towards climate‐resilient irrigation approaches, such as farmer‐led irrigation development; innovation and modernization to ensure the long‐term viability and functionality of irrigation systems and infrastructure; financing mechanisms to support the transition towards climate resilience; partnerships between governments, international organizations and the private sector to mobilize resources effectively; and efficient service delivery mechanisms, promoting equitable access and effective management of water resources. Emphasizing the need climate‐resilient irrigation to balance food production and water security, this essay advocates a paradigm shift towards sustainable water management, ensuring resilience in the face of climate uncertainties while safeguarding agricultural productivity and environmental integrity for a livable planet.

Achieving water security through a multi‐stakeholder networked approach: The case of “water beyond Europe”

Achieving water security through a multi‐stakeholder networked approach: The case of “water beyond Europe”

Navigating the Currents: Land Use Challenges Amidst Water and Food Security Debates and Social Media Misperceptions

This research aims to understand the complexities of energy deployment requiring nexus governance solutions. Nexus governance involves coordinating decision-making across policy areas and sectors, seeking compromise among stakeholders with varying positions. The challenge lies in coordinating diverse sectors and stakeholders amidst potentially conflicting priorities and interests. Moreover, social media significantly influence stakeholders’ perceptions and actions, serving as a platform for idea exchange and mobilization but also contributing to echo chambers and polarization. This study examines the impact of social media on perceptions of the oil shale project in Al Attarat, Jordan, focusing on the intersections of social, economic, and environmental concerns. The findings highlight that social media significantly influences public discourse, often skewing perceptions with misperceptions about land use, water, and food security. Analyzing key social media narratives reveals that food security is a primary concern, with energy and water security also gaining attention, though less prominently. Furthermore, misinformation has exacerbated tensions among stakeholders, leading to polarized views and resistance to proposed governance solutions. This research underscores the need for effective strategies to counter misinformation and promote informed dialogue.

Assessing biosocial vectors in water contamination, the incidence of water-borne illnesses, and insecurity in Kathmandu, Nepal

ABSTRACT In this study, we use water quality tests, epidemiological data, and ethnographic interviews gathered in Kathmandu in 2017 to provide an interdisciplinary analysis of water insecurity, illness, and targeted responses. Our findings fit the pattern of the past 20 years: the concentration of coliform bacteria across water sources remains unsafe. Our epidemiological data documents high rates of water-borne infectious diseases consistent with fecal contamination of water sources. Our ethnographic interviews suggest that social marginalization, poverty, and dislocation are major drivers in the incidence of illness. Evaluating some of the collective responses to water insecurity and contamination, we argue that effectively addressing water pollution, scarcity, and health outcomes in Kathmandu requires redirecting the focus of programs and the primary methods of implementation. Instead of large-scale top-down infrastructural interventions such as the Melamchi Water Supply Project, programs should target women's leadership in and subsidize funding for small-scale, community-managed interventions.

Upwind Moisture Controls on Interannual Variations of Precipitation and Vegetation in China's Drylands

AbstractDryland precipitation depends on upwind and local moisture sources via moisture recycling. How upwind moisture variations affect interannual variations of downwind precipitation and vegetation in China's drylands remains unclear. We used high‐resolution moisture tracking data sets and found terrestrial moisture (93%) was the dominant moisture source for China's drylands, especially from drylands themselves (46%). In most dryland grids, we observed strong correlations between precipitation and upwind moisture sources from 2003 to 2022 (median r = 0.55), with a more significant effect in drier areas. These demonstrated the upwind moisture control on interannual variations of dryland precipitation, in which internal moisture from drylands exceeds the influence of external terrestrial sources. The upwind moisture variations, especially the recycled moisture of drylands, propagate to influence downwind vegetation greenness in precipitation‐sensitive dryland areas. Our findings revealed that upwind moisture variations induced by climate or land‐cover changes have important implications for water and food security in China's drylands.

Conjunctive use in water resource management: current trends and future directions

ABSTRACT Water scarcity and the nееd for sustainable water management practices are pressing global challenges. Conjunctive use, a united management of both surface water and groundwater resources, is being progressively considered as one of the fundamental approaches to solving these issues. This paper gives a detailed overview of the conjunctive use in water resource management considering the present tendencies and directions of development in this sphere. The present study relies on a diverse variety of literature resources which integrate the new techniques, equipment, and policies in respect to conjunctive use. It covers important issues like hydrological modeling, innovative groundwater recharge methods, and integrating conjunctive use techniques into adaptive management system. Moreover, the review also evaluates the roles of different parties, such as government agencies, communities, and industries, involved in the conjunctive use approaches and the promotion of collaborative governance mechanisms. This review identifies that while the conjunctive use approaches are very promising for solutions to water security, fragmented management and poor data integration constrain them. The paper conducts an all-embracing analysis that pinpoints the upcoming problems and solutions, and discovers the need for extensive research and innovation to make the conjunctive water resources management more efficient and resilient.

“In the dry season, our suffering doubles”: Barriers to water access in poor urban settlements in Ghana

If current trends of water insecurity continue, nearly two-thirds of the world’s population will live in water-scarce conditions by 2025. Nevertheless, qualitative studies on barriers to water access, particularly in informal settlements, remain limited. This study used in-depth interviews to examine the daily barriers to water access faced by urban poor households in Ghana. A total of 30 (n = 30) semi-structured in-depth interviews were conducted with residents in water-insecure areas in Tamale and Accra, Ghana. Four themes emerged from our analysis: lack of financial resources, distance and travel time, land and topography, and poor water infrastructure. Sustainable Development Goal Six cannot be achieved if the water needs of the urban poor, particularly those who dwell in informal settlements, are unmet. Thus, governments and systems must implement measures to eliminate inequalities and inequities in water distribution.

Assessment of CROPWAT 8.0 model accuracy under deficit irrigation scheduling: A sustainable path toward smart water supply

ABSTRACT As the world confronts mounting challenges to water security, efficient irrigation becomes ever more critical. Escalating water scarcity challenges necessitate innovative smart irrigation solutions. This study investigates the potential of integrating deficit irrigation (DI) with the CROPWAT 8.0 model for sustainable and water-productive irrigation. This research evaluated the model's accuracy in generating DI schedules at 70% field capacity (FC) (T1) compared to schedules derived from frequency domain reflectometry (FDR) soil moisture sensors at 70% FC (T2). The results demonstrated economic viability and strong accuracy for T1 with consistently lower values of mean absolute error (3.6165 and 4.3987) and root mean square error (4.4447 and 5.5055) while compared to T2 across two years. In addition, T1 achieved significant water savings (43.47 and 45.16%) alongside higher water productivity (8.11 and 8.22 kg m−3), respectively, for both the years compared to full irrigation (FI). These findings highlight CROPWAT 8.0 model–driven DI scheduling as a promising smart irrigation approach for tackling water scarcity, offering economic benefits to farmers while promoting water security.