Water Security Assessment Research Articles

Water security assessment and prediction for coastal Urban Agglomeration: a case study in the Pearl River Delta, east China

Water security is a critical challenge for coastal urban regions due to rapid population growth, urbanization, and environmental vulnerability. This study provides a comprehensive water security assessment and prediction of the Pearl River Delta Urban Agglomeration, one of China’s most economically advanced yet environmentally vulnerable coastal regions. The Driving Force-Pressure-State-Impact-Response (DPSIR) conceptual framework was utilized to establish a water security evaluation index system, with indicator weights determined through the entropy method. The single-indicator quantification, multi-indicator aggregation, and multi-criteria integration (SMI-P) method was employed for a thorough assessment. Using a combination of coordination and hindrance degree models, we identified the key factors impacting water security. The findings reveal significant improvements in the region’s water security status, progressing from slightly unsafe to generally safe between 2012 and 2021. The coupling coordination degree increased from barely coordinated to intermediate coordination, with key obstacle factors identified. Predictive analysis using the grey prediction model forecasts further improvements, with water security expected to reach 0.651 by 2026. This study offers valuable insights for policymakers to enhance water resource management practices and promote sustainable development in coastal urban regions.

Integrated assessment of water security in D-8 countries

In terms of evaluating the water security situation of communities, it is necessary to use appropriate indicators. To do this, composite indicators are especially useful for policy-making on water resources, aiming to enhance water security, implementation, and monitoring of policy actions. The composite indicators of water security at the national level reflect the country's status in terms of water resource sustainability, human well-being, and water environment. In this study, the composite indicators of water security for D-8 countries were investigated in various dimensions using the data envelopment analysis model. Moreover, the status of selected countries was examined with regard to indicators related to the dimension of water security sustainability. The results provided by the proposed model showed that Malaysia, Bangladesh, Indonesia, Nigeria, and Turkey have better positions regarding the sustainability dimension compared to other countries. The water exploitation intensity in these countries was less than 40 %. Furthermore, the level of water availability in Malaysia, Bangladesh, and Indonesia was higher than 7000 cubic meters per person. It is worth noting that Low exploitation intensity and high availability of water in a country increased its water security in terms of sustainability dimension. The low water availability and very high water exploitation in Iran, Pakistan, and Egypt exacerbate their insecurity in the sustainability dimension. Due to the importance of the sustainability dimension in determining the water security status of countries, it is recommended to take this dimension into account.

Assessment of Future Water Security under Climate Change: Practical Water Allocation Scenarios in a Drought-Prone Watershed in South Korea

Seomijn River Basin has numerous hydraulic structures designed to satisfy water demands and mitigate future droughts. However, the increasing water demand and export to neighboring areas cause water deficits and conflicts between water users. Therefore, practical strategies to mitigate the potential damage from climate change are essential. In this study, we aimed to propose practical strategies under climate change by examining the future water security of the Seomjin River Basin under five different water allocation scenarios referenced from the practical policies of various countries. Future climate models determined based on extreme precipitation indices of the ETCCDI were used to investigate their impact on water security, which was evaluated using unmet demand; demand coverage; reliability, resilience, and vulnerability; and aggregation index metrics. We found that prioritizing domestic and industrial water use is the optimal water security strategy, and unconditional allocation of instream flow can cause a significant water deficit for other water uses. However, prioritizing all water uses equally also proved effective under some conditions. Thus, our study highlights the importance of adaptive management and suggests that the optimal water allocation strategy lies in its flexibility in response to varying circumstances.

Enhancing water security: Statistical measurement and spatiotemporal analysis

Water security is essential for ensuring energy security, sustainable development, and human survival. However, due to a series of challenges, including rising water demand, environmental pollution, and water resource shortages, the global water security situation remains concerning and poses a threat to global sustainable development. To assess water security in China, this study uses data from 30 provinces in China from 2012 to 2021. A comprehensive evaluation method was applied to determine the level of water resource security in China. The Dagum Gini coefficient, Moran index, and spatial model were used to clarify regional differentiation characteristics and the driving factors. The results indicate that while China's water resource security is relatively low, it has shown steady improvement in recent years. Significant regional disparities exist in water resource security across China, with notable spatial characteristics, and socio-economic factors are the primary causes of these differences. Based on the above research, we put forward policy recommendations from the aspects of water resources management, public participation and inter-regional water resources cooperation, to provide reference for water resources security in developing countries.

Water Security Characteristics of Existing Water Service Provision Systems in Informal Settlements within Nairobi County, Kenya

Attainment of water security in urban informal settlements in developing countries can be a complex undertaking due to various factors that affect water service provision, such as insufficient water quantities, unreliable water supply, aging pipes, and infrastructure coverage, among others. In addition to this, the territorial behaviour and therefore a siloed approach of service providers propagate water insecurity. This situation has an impact on the socio-economic development, peace and political stability, water-related disasters, and waterborne diseases in many urban informal settlements in developing countries. The study sought to assess water security characteristics in informal settlements in Nairobi County. The research was informed by the systems theory. The study adopted a descriptive research design. The research targeted a population of 2,511,991 people living in the informal settlements and 544 water service providers (formal utilities and small-scale vendors) operating in the informal settlements. Both probabilistic and non-probabilistic sampling methods were used in this study to select the respondents. Data was collected from a sample of 388 households and 62 water vendors from nine slums in 12 sub-counties. A household questionnaire was used to collect data. Data was analysed using descriptive and inferential statistics. From the findings, only 0.4% of households met all six parameters (availability, access, quantity, quality, affordability, and reliability) of water security. Most of the households satisfied four parameters, 30% met three parameters, 20.8% met two parameters, 11.7% met five parameters, and 5.3% met one parameter. This pointed to a situation where water security is a major concern in Nairobi’s Informal Settlements (INSEs). The existing water structures of service provision influenced only three of the six water security factors, and that is, availability, access, and quality. The level of structure did not have any impact on quantity, affordability, or reliability of water services. The study therefore concludes that the provision of infrastructure alone may not necessarily lead to overall household water security. The research findings show that integration is possible along the three levels—water production, water delivery infrastructure, and service levels experienced by the households. It was however noticed that a household could depend on multiple sources and therefore experience various levels of services. The study recommends that the national and county governments and stakeholders in the water sector, while planning water service provision and infrastructure development, should ensure that efforts towards attaining universal access to water through availability, access, quantity, quality, affordability, and reliability should have a targeted approach to reach those who are most water insecure.

Towards the sustainable development of water security: A new copula-based risk assessment system

Water security is deeply intertwined with ecosystems, society and the economy, and is a frequent focal point of sustainable development. This study investigates the water security (WS) of Inner Mongolia, a dryland region in northern China. Specifically, an indicator system integrating the principles of Stability (S), Cooperation (C), and Resilience (R) was constructed to quantitatively and comprehensively assess water security. Risk probability was calculated by the constructed system by combining its output with a copula function. The findings revealed that: (1) WS-SCR levels in the study area gradually increased from 2001 to 2021. The periods multi-year average was 0.42, which is at the threshold level of security; (2) Based on a standard deviation ellipse, the spatial distribution of WS-SCR levels changed from northeast to southwest and back to northeast. The centroid of change shifted from east to west and back to east; (3) Key drivers influencing water security included GDP per capita (S3), agricultural irrigation water consumption per unit area (C4), comprehensive water use per capita (C5), reclaimed water use rate (C8), fertilizer application per unit of farmland (R4), and population density (R5); (4) The S-C, S-R, and C-R relationships within the study area were best modelled by the Clayton copula function, whereas the S-C-R relationship was most accurately modelled by using a Frank copula function. The three-dimensional joint risk probability S-C-R (S≤0.4, C≤0.4, R≤0.4) is 0.226; the probability that R was insecure increased with increasing S or C index values. This study provides a scientific foundation for the long-term planning and management of sustainable water security development in Eurasian drylands.

Ecohydrological and hydrogeological dynamics of groundwater springs in Eastern Himalaya, India

Groundwater springs are critical to achieving Sustainable Development Goals (SDG 6, access to clean water) in the Himalaya and remain highly vulnerable to climate change and land-use and land cover change. In a first from Eastern Himalaya, we analysed the relative controls of land-use, precipitation, soil properties, and hydrogeology on the diel and seasonal variability in three representative springs using high-frequency discharge monitoring. Kamrang spring is a high-discharge depression spring fed by a homogenous aquifer, whereas Mamley and Gaddi show dual-flow characteristics attributed to primary matrix-based flows and secondary conduit (karst) or unconsolidated storage-based flows, respectively. The first reports of strong diel fluctuations in springflows show significantly higher amplitude in the depression spring (22 ± 41 l min−1) than the fracture (15 ± 26 l min−1) and karst springs (12 ± 24 l min−1), attributed to evapotranspiration and hydrogeology, respectively. The forest spring (Gaddi, low soil hydraulic conductivity, Ksat) showed a faster response at intense precipitation (>30 mm h−1), whereas the agriculture springs (Kamrang and Mamley, high Ksat) showed the lowest lags at low-moderate intensities (<20 mm h−1). The depression spring showed high recharge potential, whereas the karst and fracture springs were constrained by their relatively smaller recharge area and low Ksat, respectively. The per capita daily water availability was barely sufficient to support the minimum (20 l) and mandated (55 l) requirements for 30–70% and 2–47% of days a year, respectively. Thus, future precipitation intensification and land-use change will disproportionately impact the >5th-order karst and fracture springs. The study provides an integrated analytical framework for understanding Himalayan springs, which are critical for achieving SDG 6 (access to clean water) and a baseline for developing appropriate springshed models for effective management of freshwater ecosystems (SDG 15) against future climate change impacts (SDG 13), as well as informing the water security assessment in the Himalaya.

Water-suitable reclamation can mitigate the amplified agricultural water stress driven by climate change in arid inland basin

The escalation of water scarcity poses a significant challenge to the sustainability of irrigated agriculture in arid regions, with climate change further amplifying the unpredictability of water resources for agricultural purposes. Despite the critical nature of this issue, there is a lack of research identifying effective adaptation strategies and establishing water-suitable thresholds for agricultural development. This study modified a conventional approach for estimating irrigation water use (IWU) in the Heihe agricultural area of Northwest China, integrating the distributed hydrological components of the Soil and Water Assessment Tool (SWAT) model. It modeled IWU and surface water availability across three representative concentration pathways (RCPs) and conducted an extensive analysis of agricultural water scarcity for the period 2021–2050. The study established threshold levels for water-suitable agricultural development based on predicted local water resource conditions. Findings suggested a trend towards warmer and wetter conditions in the Heihe agricultural area over the next three decades. The anticipated average IWU, predicted by five general circulation models (GCMs), was expected to reach 26.785 × 108 m3 (RCP2.6), 26.827 × 108 m3 (RCP4.5), and 26.865 × 108 m3 (RCP8.5). These projections indicated an increase of 0.815 × 108 m3, 0.857 × 108 m3, and 0.895 × 108 m3, respectively, in comparison to the historical period spanning from 1985 to 2014. Streamflow was anticipated to diminish by 0.28 × 108 m3 (RCP2.6), 0.46 × 108 m3 (RCP4.5), and 0.23 × 108 m3 (RCP8.5). The predicted agricultural water scarcity index (WSI) was 1.764 (RCP2.6), 1.789 (RCP4.5), and 1.763 (RCP8.5), indicating a worsening of agricultural water use shortages due to climate change. The study identified controlling the scale of cultivation as the most effective adaptation strategy, recommending that water-suitable agricultural reclamation in the Heihe agricultural area be confined to 25 × 104 ha. This research offers a comprehensive assessment of future water security in an arid inland basin, providing valuable insights into the sustainable development of global irrigated agriculture and adaptation strategies in response to climate change.

A Framework Using Applied Process Analysis Methods to Assess Water Security in the Vu Gia–Thu Bon River Basin, Vietnam

A Framework Using Applied Process Analysis Methods to Assess Water Security in the Vu Gia–Thu Bon River Basin, Vietnam

Risk assessment of agricultural green water security in Northeast China under climate change

Risk assessment of agricultural green water security in Northeast China under climate change

Integrated water-population interactions framework: An application to assess water security in Iran

While dynamic water security models related to food and livelihood security have advanced significantly in recent decades, the inclusion of demographic variables in these models is often limited to merely population growth. As many countries have either completed or are in the process of completing the demographic transition, population growth alone may no longer be the predominant demographic variable influencing water security models. Therefore, there is a discernible need for more comprehensive water security models to consider the simultaneous impact of various demographic variables on different aspects of water security. Inspired by the contemporary environmental demography perspectives, we introduce a generic integrated framework for integrated water-population interactions (IWPI) which explores the overlooked impacts of demographic transitions on different aspects of water security. Demographic shifts can impact food and water consumption and agricultural employment. Recognizing these dynamics is essential as countries advance through demographic transitions and face mounting pressures on water resources. The Integrated Water-Population Interaction (IWPI) framework was implemented in Iran through the Water-Population System Dynamics (WPSD) model. The model shows that population size, household composition and urbanization significantly affect domestic water consumption. It also reveals how changes in educational and occupational structures impact livelihood security and food self-sufficiency under water constraints. We introduce a novel population metric for water security assessment in Iran, offering policy-makers a tool to assess and address water insecurities that can affect the population in different ways. Our findings recommend realistic food self-sufficiency targets, flexible water resource planning and policies that integrate population dynamics with water, food and livelihood security to ensure sustainable outcomes in Iran.

Urban water security assessment: investigating inequalities using a multi-scale approach

Abstract Water security is a multi-faceted concept that encompasses dimensions such as water quantity, quality, human health, well-being, water hazards, and governance. The evaluation of water security is an important step towards understanding and improving it, particularly in urban settings where disparities resulting from unequal distribution of population and resources are present and often evade citywide assessments. To address the diversity of the urban space, we propose a multi-level assessment approach based on downscaling the spatial dimension. Using a comprehensive indicator-based framework, we evaluate the city of Campinas in Brazil across citywide and intra-city scales. Employing the Theil index to measure inequality, the results reveal nuanced disparities less apparent at broader scales. Despite an overall favourable water security condition, spatial heterogeneity is still noticeable in the urban area of Campinas. The methodology highlights different aspects, such as vegetation cover, social green areas, and wastewater collection, which are inequitably distributed in the urban area. This integrated approach, linking inequality and water security assessment, has the potential to unveil specific needs within urban areas, helping guide targeted interventions to improve water security levels for all.

Review of water scarcity assessments: Highlights of Mexico's water situation

AbstractThis article examines the situation of water scarcity and security in Mexico, with a focus on the drinking water supply issue in rural communities and the challenges posed by assessment methodologies. We conducted a comprehensive literature review to update the available information on the water crisis in Mexico and its impact on rural communities in the country, as well as the methodologies employed to assess water security and the methodological challenges associated with them. Among the most noteworthy findings is the persistent challenge in evaluating water scarcity and its implications for communities, due to the lack of consensus on the most precise methodology. Nevertheless, current methodological approaches suggest the integration of physical models with pertinent social, economic, and political data. The literature broadly agrees on the severity of the water scarcity crisis and the clear link between rural poverty and inadequate access to drinking water. Water scarcity is both a contributing factor to and a consequence of poverty, stemming from a complex interplay of socioeconomic pressures, inadequate institutional responses, and deficient water management. The paper concludes that water scarcity involves intricate interactions among various factors, encompassing physical water scarcity, pollution, and the impacts of climate change on the water cycle, and most critically, the complexities inherent in water management and regulatory frameworks. Therefore, the integration of well‐informed policies, effective management practices, and collaborative efforts is crucial for ensuring a prosperous and sustainable future. Effective water management can effectively mitigate the challenges of water scarcity and alleviate poverty.This article is categorized under: Engineering Water &gt; Water, Health, and Sanitation Human Water &gt; Rights to Water Science of Water &gt; Water and Environmental Change

Analysis of the evolution of water culture and water security in the Weihe River Basin over a 100 year-period

The significance of water culture in addressing water crises and ensuring water security has garnered considerable attention, emerging as a focal point in global change and water science research. Water culture is a societal adaptation to changes in hydrological systems. However, this needs to be acknowledged within contemporary discourse on water security governance. This study utilized historical policy document data from many sources, including local municipal records from Shaanxi and Gansu, and water conservancy records. It aimed to identify the significant nodes and stages of policy transformation in the Weihe River Basin (WRB) during the last century (1949–2020). This study employed a content analysis method to elucidate the evolutionary patterns of water culture in the study region during the previous century. Drawing on the co-evolution framework, our investigation delved into the reciprocal relationship between changes in water culture and the evolution of water security in the WRB. Our findings indicated that water culture transformation in the WRB has undergone four significant stages: the Disaster-Resistant Hydraulic (1949–1966), Irrigation Hydraulic (1967–1998), Resources Hydraulic (1999–2010), and Ecological Hydraulic (2011–2020) phases. Water security assessment showed that policy attention varied across the different stages. The disaster-resistant hydraulic phase primarily addressed water-related disaster concerns, whereas the irrigation hydraulic phase emphasized the scarcity of water resources. The resource hydraulic phase focused on ensuring the security of the water environment, while the ecological hydraulic phase placed emphasis on safeguarding water sustainability. Moreover, we found that prevailing water policies prioritize resolving isolated issues; however, water security is a multifaceted systemic matter that requires a comprehensive approach. This study has the potential to offer policy makers a more comprehensive and systematic perspective, enabling them to enhance their understanding of the underlying nature of the problems. Additionally, this study can assist in developing future water security policies.

Water security assessment for effective water resource management based on multi-temporal blue and green water footprints

Climate change and land use change have significantly altered the water cycle, thus affecting watershed water security. Quantitative assessment of water security using the water footprint concept can improve water resource management at the watershed scale. Therefore, this study aims to investigate the impacts of climate change and land use change on water security based on the water footprint concept, with the goal of enhancing water resource management at the watershed level. In this study, we employed the Soil and Water Assessment Tool (SWAT) to quantify the spatial and temporal distribution of blue and green water resources in the Weihe River Basin (WRB), China. Multiple water security evaluation indicators, including scarcity and vulnerability, were integrated to quantify water security. Significantly, statistical analysis methods were employed to identify key factors influencing the changes in blue and green water. The results indicate that the interannual and monthly coefficient of variation for blue water is higher than that for green water, with the order being blue water > green water storage > green water flow. Hotspots of the blue water crisis are concentrated from February to July, with agricultural water use exhibiting the highest crisis (BWvulnerability = 0.814), while hotspots of the green water crisis are concentrated from April to October. Blue water is primarily influenced by climate change, particularly precipitation, while the changes in green water flow and green water storage are influenced by the interactive effects of climate change and land use change. Specifically, in the upstream, blue water is mainly influenced by precipitation (r = 0.703), while green water is influenced by precipitation, temperature, and pasture. In the midstream, blue water is mainly influenced by precipitation, temperature, and agriculture, while green water is additionally influenced by forest and pasture. In the downstream, the key influencing factors for blue and green water are similar to those in the midstream, with the difference that blue water is negatively correlated with the population (r = -0.421). Developing water-saving agriculture can effectively improve water security in the midstream and downstream. This study has identified key factors for optimizing the allocation of water resources upstream, midstream, and downstream, providing valuable insights for future research on water security at the basin scale.

Assessing inequalities in urban water security through geospatial analysis

Water security, which is key for sustainable development, has been broadly investigated through different spatial scales, time frames and perspectives, as a multi-dimensional concept. Fast growth and the diversity of the urban environment add to the challenges of reaching good levels of water security in cities. Yet, few studies have focused on evaluating the heterogeneous distribution of water security in urban areas, which is a key step to highlight where inequalities in large cities are present and how to best guide interventions. The objective of this research is to investigate the spatial heterogeneity of urban water security as well as quantifying inequalities using the new assessment presented in this paper. A holistic indicator-based evaluation framework to intra-urban sectors of the city of Campinas in Brazil is applied, followed by an inequality analysis to describe the distribution of water security aspects. A spatial correlation analysis is then carried out to identify patterns for high inequality indicators. Results show that even though Campinas has established good overall water security conditions, spatial heterogeneity is still noticeable in the urban area. Quantification of inequality by the Theil index highlighted aspects, such as vegetation cover, social green areas, and wastewater collection, that are inequitably distributed in the urban area. The subsequent analysis of spatial patterns exposed areas on the outskirts of the city where infrastructure challenges and social vulnerability coincide. This novel approach has been therefore successfully validated in a city in Brazil, and it has been demonstrated that our water security assessment framework identifies what are the main water security challenges and where they are in the city. For the first time we show that associating spatial and inequality analysis with conventional evaluation of urban water security has the potential to help target areas in need and tackle specific water security issues in the urban area. This is crucial to inform urban planning and policy making for a sustainable and inclusive urban water management strategy.

Associations between water insecurity and mental health outcomes among lesbian, gay, bisexual, transgender and queer persons in Bangkok, Thailand and Mumbai, India: Cross-sectional survey findings

Abstract Background Water insecurity disproportionally affects socially marginalized populations and may harm mental health. Lesbian, gay, bisexual, transgender and queer (LGBTQ) persons are at the nexus of social marginalization and mental health disparities; however, they are understudied in water insecurity research. Yet LGBTQ persons likely have distinct water needs. We explored associations between water insecurity and mental health outcomes among LGBTQ adults in Mumbai, India and Bangkok, Thailand. Methods This cross-sectional survey with a sample of LGBTQ adults in Mumbai and Bangkok assessed associations between water insecurity and mental health outcomes, including anxiety symptoms, depression symptoms, loneliness, alcohol misuse, COVID-19 stress and resilience. We conducted multivariable logistic and linear regression analyses to examine associations between water insecurity and mental health outcomes. Results Water insecurity prevalence was 28.9% in Mumbai and 18.6% in Bangkok samples. In adjusted analyses, in both sites, water insecurity was associated with higher likelihood of depression symptoms, anxiety symptoms, COVID-19 stress, alcohol misuse and loneliness. In Mumbai, water insecurity was also associated with reduced resilience. Conclusion Water insecurity was common among LGBTQ participants in Bangkok and Mumbai and associated with poorer well-being. Findings signal the importance of assessing water security as a stressor harmful to LGBTQ mental health.

Assessing Water Security and Coupling Coordination in the Lancang–Mekong River Basin for Sustainable Development

Water security is crucial for the sustainable development of regional water resources. Here, we utilize the Driver-Pressure-State-Impact-Response (DPSIR) framework to construct an indicator system for assessing water security in the Lancang–Mekong River Basin (LMRB). This study also delves into the level of development in the coupling coordination between the economic and social systems and the water resources systems in the basin. The findings reveal that the overall water security situation in the LMRB is satisfactory, with three countries (China, Laos, and Vietnam) surpassing the “safe” threshold and three countries (Thailand, Cambodia, and Myanmar) “Basically safe”. However, water security issues persist, particularly in relation to water pollution and scarcity. Seasonal water shortages and water-related disasters arise due to uneven rainfall distribution throughout the year and inadequate regulating facilities such as wetlands and reservoirs. In addition, the overall coupling coordination level in the LMRB is low, ranging between 0.3 and 0.4, corresponding to a moderate imbalance level in the assessment criteria system. Specifically, Laos and China exhibit the highest coupling coordination level, with a degree of 0.36, whereas Thailand and Myanmar demonstrate the lowest level, with degrees of 0.33 and 0.31, respectively. Overall, our results offer a scientific foundation for the sustainable development of countries within the LMRB.

The development of water security index in urbanized sub-Himalayan region: the study of Jammu city

ABSTRACT As small and medium-sized cities of Himalayan and Sub-Himalayan India are rapidly urbanizing, certain structural issues like water management, climate change, the economic conditions, and poor urban planning contribute to growing water insecurity. The Jammu city in India’s sub-Himalayan region relies heavily on water from the Tawi River, a tributary of the Chenab River, and also from the groundwater sources for personal and commercial uses. As the city stares at uncertain future scenario, implementing city-specific equitable water supply strategies is the only way forward. This research using Water Security Assessment Framework with five major dimensions (water supply and sanitation; water productivity; water-related disasters; water environment; and water governance) and twelve related indicators, quantifies the water security index for Jammu city. It further finds that the sub-Himalayan city needs a comprehensive and integrated strategy for planning and managing urban water.

Assessing Water Security in the Jordan River Basin: Temporal Changes for Precipitation, Evapotranspiration and Land Cover

Assessing Water Security in the Jordan River Basin: Temporal Changes for Precipitation, Evapotranspiration and Land Cover