Elham M. Ali, Naglaa Zanaty, Nesren Khairy, Islam Abou El-Magd
{"title":"Harnessing EO data for short-term surveillance and projections of the Nile Delta coastline and sea-level dynamics","authors":"Elham M. Ali, Naglaa Zanaty, Nesren Khairy, Islam Abou El-Magd","doi":"10.1016/j.indic.2025.100961","DOIUrl":"10.1016/j.indic.2025.100961","url":null,"abstract":"<div><div>The northern coastal zone of Egypt is a complex, resource-rich ecosystem, home to nearly 45 % of the country's population and featuring diverse infrastructures, including urban centers, industrial estates, harbors, and agricultural lands. However, this region is highly vulnerable to climate change, particularly coastal erosion and Sea Level Rise (SLR). This study utilizes earth observation techniques to assess these risks, employing data from Landsat 8, Sentinel-2, Digital Elevation Model (DEM), and sea level datasets. The analysis of various SLR scenarios (1m, 2m, and 3m) indicates significant flooding risks. A 1-m rise could inundate approximately 5097 km<sup>2</sup>, affecting nearly 10 million people, while a 3-m rise may submerge 11,444 km<sup>2</sup>, displacing around 16 million residents. Additionally, coastal erosion analysis from 2010 to 2020 revealed considerable land loss, with approximately 4.662 km<sup>2</sup> eroded over the decade at an average rate of −0.46 km<sup>2</sup> per year. For the short-term analysis (2010–2015), about −2.181 Km<sup>2</sup> of coastal areas were eroded, with an erosion rate of −0.44 km<sup>2</sup>/year. El-Behira, Alexandria, Kafr El-Sheik, and Port Said are the most vulnerable locations. These environmental threats pose severe socio-economic risks, potentially costing billions of dollars due to damage to infrastructure, agriculture, and local industries. This study underscores the urgent need for adaptive coastal management strategies to mitigate long-term risks and enhance the resilience of the Nile Delta region.</div></div>","PeriodicalId":36171,"journal":{"name":"Environmental and Sustainability Indicators","volume":"28 ","pages":"Article 100961"},"PeriodicalIF":5.6,"publicationDate":"2025-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145267091","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}
Giulio Cascone, Paolo Guarnaccia, Giuseppe Timpanaro
{"title":"Innovation in inner areas: How Living Labs support green transition and bio-district success","authors":"Giulio Cascone, Paolo Guarnaccia, Giuseppe Timpanaro","doi":"10.1016/j.indic.2025.100969","DOIUrl":"10.1016/j.indic.2025.100969","url":null,"abstract":"<div><div>Bio-districts represent an innovative governance tool that fosters cooperation among farmers, institutions, and other local actors to promote environmental sustainability, economic resilience, and social cohesion in rural areas. However their implementation requires the active engagement of farmers, whose willingness to participate is influenced by a range of psychological and institutional factors. This study investigates the factors influencing organic farmers’ intention to join a potential Bio-district in the Calatino area (Sicily, Italy), applying an Extended Theory of Planned Behaviour (ETPB) framework that includes Perceived Utility and Trust in Government. A survey was conducted with 143 organic and transitioning farmers. Data were collected through a participatory Living Lab approach, which provided space for dialogue, knowledge exchange, and co-learning. The results show that Attitude (β = 0.649; p < 0.001) and Subjective Norms (β = 0.231; p < 0.01) positively influence the Intention to join the Bio-district, while Perceived Behavioural Control is not significant. Furthermore, Perceived Utility (β = 0.410; p = 0.001) and Trust in Government (β = 0.173; p = 0.055) indirectly influence Intention through Attitude. The participatory approach of the Living Lab facilitated data collection and encouraged farmer involvement, providing a shared learning environment and helping to build trust among local actors. The study offers concrete recommendations for public policy: strengthening institutional trust, communicating the tangible benefits of membership, and adopting participatory tools can promote the adoption of sustainable agricultural models in marginal rural contexts.</div></div>","PeriodicalId":36171,"journal":{"name":"Environmental and Sustainability Indicators","volume":"28 ","pages":"Article 100969"},"PeriodicalIF":5.6,"publicationDate":"2025-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145267092","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}
Hong Chang , Lei Shi , Yahong Liu , Siyuan Guo , Jianming Niu
{"title":"Livelihoods as mediators: Unraveling the ecosystem services-human well-being nexus in the desert steppe of inner Mongolia, China","authors":"Hong Chang , Lei Shi , Yahong Liu , Siyuan Guo , Jianming Niu","doi":"10.1016/j.indic.2025.100968","DOIUrl":"10.1016/j.indic.2025.100968","url":null,"abstract":"<div><div>Ecosystem services (ES) and Human well-being (HWB) constitute two fundamental components of sustainable development. However, the intricate interdependence and feedback between them are difficult to quantify. Livelihoods serve as critical mediators between ES and HWB, providing a novel approach to examine their interactions. This study took desert steppe area of Inner Mongolia, China as the study area, by integrating the sustainable livelihood framework, analyzed livelihoods, well-being, and ES at the household scale, revealed the interactions among ES, livelihoods, and HWB at three levels by the path analysis model. Results showed natural and financial capitals were the main constraints on pastoral livelihoods. ES (grass yield, water yield, soil conservation, and carbon storage) increased southward, while firewood supply and carrying capacity of livestock showed spatial heterogeneity. Objective well-being (OWB) remained low despite high subjective well-being (SWB), reflecting material-psychological disparities. Overall, ES enhanced OWB, while livelihood capitals paradoxically degraded ES yet improved OWB. At the subtypes level, regulatory service positively impacted OWB, natural capital negatively affected provisioning and regulatory service. Natural, physical, human, and social capitals improved OWB. At the indicator level, livelihood capitals, such as adult male labor and other factors were identified as critical mediated factors. The study advances ES-HWB theoretical frameworks, offering actionable insights for balancing ecological conservation and pastoral households’ well-being in arid ecosystems.</div></div>","PeriodicalId":36171,"journal":{"name":"Environmental and Sustainability Indicators","volume":"28 ","pages":"Article 100968"},"PeriodicalIF":5.6,"publicationDate":"2025-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145267093","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}
An Thinh Nguyen , Thi Thanh Thuy Vu , Thi Phuong Nhung Nguyen , Ngoc Trinh Phuong , Ngoc Anh Le , Thao Do Thi , Trang Le Huyen
{"title":"Sustainable agritourism monitoring: An expert Delphi study on provincial-level indicators in Vietnam","authors":"An Thinh Nguyen , Thi Thanh Thuy Vu , Thi Phuong Nhung Nguyen , Ngoc Trinh Phuong , Ngoc Anh Le , Thao Do Thi , Trang Le Huyen","doi":"10.1016/j.indic.2025.100966","DOIUrl":"10.1016/j.indic.2025.100966","url":null,"abstract":"<div><div>Despite agritourism’s potential, the lack of a standardized and context-specific sustainability monitoring framework limits the effection of policy and management in Vietnam. This study addresses the lack of validated provincial-level indicators related to local socio-economic and environmental contexts. Using the Expert Delphi method, we developed a comprehensive indicator framework for establishing a structured and measurable approach to monitoring the development of agritourism, ensuring long-term sustainability while maximizing economic, socio-cultural and environmental benefits. The Expert Delphi technique facilitates the development of a rigorous, consensus-driven set of sustainability indicators, ensuring both practical applicability and scientific reliability. The expert panel comprised 23 members with multidisciplinary backgrounds in agritourism, including 60.87 % are middle managers from universities and research institutes and 39.13 % are senior managers and researchers from academic institutions and the private sector. Most of experts have both theoretical expertise and practical experience (65.22 %). The panel’s diverse knowledge base and professional backgrounds provided a solid foundation for iterative questionnaire evaluation throughout the Delphi process. Through three rounds of expert discussions and evaluations, a consensus is reached on a final set of 46 sustainability indicators, systematically categorized into five fundamental dimensions: Economic (economic benefits, seasonality, jobs, competitiveness of enterprises …), Social (the impact on local communities and visitors, local community's awareness, security and safety, gender equality, child labour …), Environmental (protection and rational use, surrounding environment quality, waste management, promoting green and circular economy …), Cultural (legal basis, conservation and development, communication, the integrity and authenticity …) and Governance (marketing, diversification of products and services, digital transformation, green productivity …). This structured framework offers a comprehensive mechanism for assessing agritourism sustainability, encompassing economic viability, cultural heritage preservation, environmental conservation and governance effectiveness. By aligning the proposed framework with existing rural development strategies, this study contributes to a coordinated, evidence-based approach that strengthens the sustainability, resilience and economic viability of Vietnam’s agritourism sector.</div></div>","PeriodicalId":36171,"journal":{"name":"Environmental and Sustainability Indicators","volume":"28 ","pages":"Article 100966"},"PeriodicalIF":5.6,"publicationDate":"2025-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145267097","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}
Mohammed Sultan Alsubaie , Muhammad Tanveer , Haider Mahmood
{"title":"The moderating effect of geopolitical risk in the nexus between trade openness, FDI, and carbon emissions in Saudi Arabia","authors":"Mohammed Sultan Alsubaie , Muhammad Tanveer , Haider Mahmood","doi":"10.1016/j.indic.2025.100967","DOIUrl":"10.1016/j.indic.2025.100967","url":null,"abstract":"<div><div>Geopolitical Risk (GPR) can directly impact a country's environmental conditions and may also have indirect effects through Foreign Direct Investment (FDI) and trade. This study investigates the determinants of CO<sub>2</sub> emissions by examining the roles of income, Trade Openness (TO), FDI, and GPR in the Environmental Kuznets Curve (EKC) framework in Saudi Arabia from 1985 to 2023. Moreover, the moderating role of GPR is also investigated in the relationships between TO, FDI, and the environment. The results show that the EKC hypothesis is substantiated, and FDI and TO raise CO<sub>2</sub> emissions. Moreover, GPR is found to significantly increase emissions. Thus, GPR weakens institutional commitment to environmental regulations and deters clean energy investments. In addition, the interaction terms of GPR with TO and FDI reveal that under high geopolitical risk, the environmental impacts of TO and FDI are increased. Thus, geopolitical uncertainty amplifies the negative environmental externalities of globalization. The findings of this research suggest regulating TO, FDI, and GPR to enhance environmental sustainability.</div></div>","PeriodicalId":36171,"journal":{"name":"Environmental and Sustainability Indicators","volume":"28 ","pages":"Article 100967"},"PeriodicalIF":5.6,"publicationDate":"2025-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145266686","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":"Spatial correlation network, driving factors and planning application of land green use efficiency in Zhejiang Province, China","authors":"Caiyao Xu , Yan Ren , Fanbin Kong","doi":"10.1016/j.indic.2025.100963","DOIUrl":"10.1016/j.indic.2025.100963","url":null,"abstract":"<div><div>Exploring land green use efficiency (LGUE) is crucial for optimizing land allocation and spatial planning, especially in land-constrained regions. Using 2001–2023 panel data from 90 counties of Zhejiang Province, this study constructs a LGUE spatial correlation matrix using a modified gravity model, applies social network analysis (SNA) to examine LGUE spatial correlation network (SCN) evolution, and uses spatial Durbin model to identify drivers. The findings reveal that: (1) LGUE exhibits a \"first rise then decline\" trend with spatial polarization. (2) The SCN optimized, correlation pairs increasing from 70 in 2001 to 254 in 2023, forming a Hangzhou-Ningbo-Zhoushan radial pattern. (3) Network structure featured \"stable connectivity but loose cohesion\": connectivity remained 1, density 0.12–0.17, efficiency down to 0.7794 from 2001 to 2023, while hierarchical degree up to 0.3045 post-2015, (4) 90 counties were classified into four functional blocks. (5) Core areas concentrated in four metropolitan zones (Hangzhou, Ningbo, Jinhua, Yiwu), aligning with the \"dual-core, quad-polar\" plan, but key areas like Yiwu and Ninghai remained peripheral, with \"multiple clusters\" yet to form. (6) Econometric results show economic development, government intervention, openness, and population density positively impacted LGUE, while energy consumption intensity, industrial structure advancement, and rationalization had negative effects, with significant heterogeneity between core and peripheral zones. This study deepens the understanding of LGUE's spatiotemporal and network traits, constructs a systematic measurement framework, and provides targeted support for enhancing LGUE and optimizing land planning in Zhejiang Province and other similar regions.</div></div>","PeriodicalId":36171,"journal":{"name":"Environmental and Sustainability Indicators","volume":"28 ","pages":"Article 100963"},"PeriodicalIF":5.6,"publicationDate":"2025-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145266685","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}
Zacharius Marnus Smit , Paulus Johannes Malan , Gert Nicolaas Smit , Francois Deacon
{"title":"Drought impact on woody plant leaf phenology and browse availability in a semi-arid environment","authors":"Zacharius Marnus Smit , Paulus Johannes Malan , Gert Nicolaas Smit , Francois Deacon","doi":"10.1016/j.indic.2025.100960","DOIUrl":"10.1016/j.indic.2025.100960","url":null,"abstract":"<div><div>The phenology of plants is influenced by numerous environmental factors such as temperature, day length and rainfall. Droughts are characterised by below average rainfall and above average temperatures and are likely to impact plant phenology. In the semi-arid and arid environments of South Africa, droughts occur frequently but are predicted to become more common because of climate change. The impact of drought and climate change on woody plant phenology can be detrimental to wildlife and livestock that are reliant on woody plants as a food source. To determine the potential impact of drought on woody plant phenology and ultimately leaf biomass available to browsing herbivores, the leaf phenology and leaf biomass of eighteen woody species were determined over a 24-month period during a prolonged drought. It was found that drought affected all species studied as it altered periods of growth and dormancy in plants. Specifically, the drought resulted in deciduous species flushing new leaves later in the season while the dropping of leaves occurred much sooner than normal. In evergreen species total leaf carriage was reduces. Consequently, the drought also resulted in prolonged periods of reduced browse availability. The study also found that reduces rainfall over longer periods (i.e. 6 months) had the greatest effect on leave phenology. It was concluded that intense drought can result in severe food limitations. Increased drought frequencies due to climate change may therefore reduce the productivity of the Kalahari region. It is likely that land managers will have to become even more pragmatic in the management of wildlife populations, specifically focusing on stocking rates and the mix of species maintained.</div></div>","PeriodicalId":36171,"journal":{"name":"Environmental and Sustainability Indicators","volume":"28 ","pages":"Article 100960"},"PeriodicalIF":5.6,"publicationDate":"2025-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145267121","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}
Linjuan He , Zhuoma Gesang , Qun'ou Jiang , Ziyun Zhen , Weihang Zhao , Yao Xiao
{"title":"Unveiling disparities: a surface deformation analysis influenced by the human activities and natural conditions in the middle Yarlung Zangbo River Valley","authors":"Linjuan He , Zhuoma Gesang , Qun'ou Jiang , Ziyun Zhen , Weihang Zhao , Yao Xiao","doi":"10.1016/j.indic.2025.100959","DOIUrl":"10.1016/j.indic.2025.100959","url":null,"abstract":"<div><div>The middle reaches of Yarlung Zangbo River Valley lie at the boundary zone between the Eurasian Plate and the Indian Plate. Geological disasters caused by the deformation of its surface pose a great threat to people's production and life. Using Sentinel-1A imagery (2017–2022), this study applied SBAS-InSAR and discrete wavelet transform to analyze surface deformation patterns and trends in the typical area of the middle reaches of the Yarlung Zangbo River Valley. It further unveiled disparities in surface deformation under the influence of human activities and natural conditions. Results indicated that the deformation rates from 2017 to 2022 ranged from −59.38 to 25.50mm/a. It exhibited a slight uplift trend, with the northern section being relatively stable, while the southern part showed uneven deformation. Seasonal subsidence is pronounced, with greater deformation in spring and summer compared to autumn and winter. Among human activities, mining had the most significant impact on surface deformation, reaching −4.29mm/a, followed by agriculture and road construction at −2.60mm/a and −1.40 mm/a, respectively. In terms of natural factors, precipitation was identified as a key driver of surface deformation, with land cultivation, river erosion, and surface load all closely related to precipitation levels. Overall, natural conditions, and human activities had alternating effects on surface evolution. Most of the area showed a slight upward changing trend, except in some areas severely disturbed by human activities. These findings provided crucial insights for developing strategies to address surface deformation in the Yarlung Zangbo River Valley.</div></div>","PeriodicalId":36171,"journal":{"name":"Environmental and Sustainability Indicators","volume":"28 ","pages":"Article 100959"},"PeriodicalIF":5.6,"publicationDate":"2025-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145220630","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}
Xueqing Wang , Jingang Wang , Jing Yao , Jiarui Niu , Yulin Hou
{"title":"Driving mechanism of urban heat island spread in the central-southern Liaoning urban agglomerations, China (2013–2020)","authors":"Xueqing Wang , Jingang Wang , Jing Yao , Jiarui Niu , Yulin Hou","doi":"10.1016/j.indic.2025.100962","DOIUrl":"10.1016/j.indic.2025.100962","url":null,"abstract":"<div><div>Urban Heat Island (UHI) spread has transitioned from a localized phenomenon to a region-wide challenge. However, previous research focusing on individual cities limits understanding of how UHI propagates across city clusters, where socio-economic and natural factors interact across administrative boundaries. This study examines cross-boundary drivers of UHI spread in the Central-southern Liaoning Urban Agglomerations (CSLUA) from 2013 to 2020 using spatial econometric models. The results reveal that: (1) The reduction in non-UHI areas in CSLUA was accompanied by substantial expansion of moderate and strong heat island zones. Urban heat does not respect administrative boundaries, and urban cores function as “thermal hubs,” exporting heat to adjacent areas through spillover effects. (2) Vegetation demonstrates paradoxical effects: NDVI has a negative direct effect on UHI locally, but a positive indirect effect on UHI in adjacent areas. This positive indirect effect does not indicate high NDVI counties aggravate their neighbors; it reflects that high NDVI counties receive heat pressure from neighboring urbanized counties with low NDVI, high temperatures, dense impervious surfaces, and intensive development. (3) Population density has a positive indirect effect on UHI, while GDP exhibits a negative indirect effect, suggesting mitigation via industrial restructuring and ecological investment. These findings provide new insights into the drivers of cross-city UHI spread and call for a shift from city-centric greening to agglomeration-scale land use governance. Prioritizing forest-water corridor networks, ecological infrastructure, and coordinated population relocation is essential to decouple urban growth from thermal intensification and build climate-resilient urban systems.</div></div>","PeriodicalId":36171,"journal":{"name":"Environmental and Sustainability Indicators","volume":"28 ","pages":"Article 100962"},"PeriodicalIF":5.6,"publicationDate":"2025-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145267095","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}
Joel Onyango , John P. Simaika , Nzula Kitaka , Kenneth Irvine
{"title":"Assessment of combined nutrients and pesticides grey water footprint in a sub-Saharan African lake catchment","authors":"Joel Onyango , John P. Simaika , Nzula Kitaka , Kenneth Irvine","doi":"10.1016/j.indic.2025.100958","DOIUrl":"10.1016/j.indic.2025.100958","url":null,"abstract":"<div><div>Water scarcity and pollution are pressing challenges in agricultural catchments. This study quantified the Grey Water Footprint (GWF) of nutrients and pesticide residues in the Lake Naivasha catchment, Kenya, and assessed spatial patterns of pollution stress. Mean daily discharge ranged from 0.03 ± 0.01 m<sup>3</sup> s<sup>−1</sup> at Little Gilgil (G2) to 2.95 ± 1.78 m<sup>3</sup> s<sup>−1</sup> at Malewa Highway Bridge (M5). The highest nutrient-related GWF was recorded for total phosphorus at Karati (K1), 5.3 × 10<sup>6</sup> ± 1.6 × 10<sup>6</sup> mm<sup>3</sup> year<sup>−1</sup>, while the lowest values were observed at the downstream Malewa sites (M4 and M5). For pesticides, cyclodienes peaked at K1 with values ranging from 1.59 × 10<sup>5</sup> ± 3.52 × 10<sup>4</sup> mm<sup>3</sup> year<sup>−1</sup> for dieldrin to 81.9 ± 32.7 mm<sup>3</sup> year<sup>−1</sup> for methoxychlor, while DDT and HCH groups ranged from 0.34 ± 0.08 mm<sup>3</sup> year<sup>−1</sup> for γ-HCH at Malewa to 3.80 × 10<sup>6</sup> ± 1.67 × 10<sup>6</sup> mm<sup>3</sup> year<sup>−1</sup> for pp-DDT at Karati. The Integrated Grey Water Footprint (IGWF) showed that pesticides dominated pollution stress at most sites, except Karati where phosphorus loads were highest. Grey Water Stress (GWS) exceeded unity (>1) at Karati, indicating that pollutant loads surpassed the river's assimilative capacity, while other sites remained below capacity, ranging from 2 to 4 % at Malewa (M1) to 10–20 % at Little Gilgil (G2). These findings highlight pollution hotspots in low-flow sub-catchments, driven by intensive farming and settlements, and underscore the urgent need for integrated water quality standards and advanced monitoring strategies to safeguard aquatic ecosystems and promote sustainable water management in sub-Saharan Africa.</div></div>","PeriodicalId":36171,"journal":{"name":"Environmental and Sustainability Indicators","volume":"28 ","pages":"Article 100958"},"PeriodicalIF":5.6,"publicationDate":"2025-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145220629","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}